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User Manual for POF Controller

1. choose SET_FIELD 2 Click SET_FIELD and FieldName choose a field in the pull down menu 3 Input value and mask of the field In this action field name is DMAC Field value is 123456789ABC Field mask is fFF 5 2 3 Configure Action 2 OUTPUT 1 Click Action and New Action choose OUTPUT 2 Click OUTPUT and outputPortID choose a port in the pull down menu 3 Input metadata offset bit metadata length bit and packet offset byte In this action output port ID is 2 Metadata offset is 0 Metadata length is 0 Packet offset is O 5 2 4 Configure Action 3 SET FIELD Same as action1 set field DMAC Value is 23456789ABCD mask is ffffffffffff 5 2 5 Configure Action 4 OUTPUT Same as action2 output port is 3 Attention DMAC is based on your test environment here is the Mac address of Tester OutputPortID is based on your switch Different switches may have different network cards and different port ID Here ports ID of network card that packet output are 2 and 3 5 3 Configure Other Tables Configuration of First Flow Table L2 Flow Table L3 Parse Flow Table and L3 Flow Table is same as IPv4 unicast use case The only difference is L3 Flow Table doesn t have instruction action SET FIELD OUTPUT The third instruction is Group and the configuration is as f
2. GOTO_TABLE and then click Next TableID choose IPvX Flow Table in the pull down menu create connection between IPvX Parse Flow Table and IPvX Flow Table 3 Click Packet Offset byte input the packet offset with the value 0 4 Click Submit in the bottom to confirm the configuration of IPvX Parse Flow Table 2013 7 18 Page 39 Total 41 6 6 Configure IPvX Flow Table 6 6 1 Choose Table Click the diamond of IPvX Flow Table 6 6 2 Add Entry 1 Click Flow Entry click the plus icon in the left of Flow Entries to add an entry 2 Click the new generated flow entry click Priority and input priority of the entry 3 Click Entry Field choose a key field input value and mask of the key field Input 0 for ignored match fields In this entry entry priority is 1 Entry field DIP value 1122334455667788 and mask fiffftititfffff 6 6 3 Configure Instruction Action 1 SET_FIELD 1 Click Instruction and New Instruction Item choose APPLY ACTIONS 2 Click APPLY ACTIONS and Add New Action choose SET FIELD 3 Click SET_FIELD and FieldName choose a field in the pull down menu 4 Input value and mask of the field In this instruction field name is DMAC Field value is 123456789ABC Field mask is ffffffffffff Attention DMAC is based on your test environment here is th
3. choose a key field input value and mask of the key field Input 0 for ignored match fields In this entry entry priority is 1 Entry field V value 4 and mask f Entry field IHL value 5 and mask f Other entry fields value 0 and mask 0 4 6 3 Configure Instruction Action 1 GOTO_TABLE 1 Click Instruction and New Instruction Item choose GOTO_TABLE 2 Click GOTO_TABLE and then click Next TableID choose L3 Flow Table in the pull down menu create connection between L3 Parse Flow Table and L3 Flow Table 3 Click Packet Offset byte input the packet offset with the value 0 4 Click Submit in the bottom to confirm the configuration of L3 Parse Flow Table 2013 7 18 Page 31 Total 41 4 7 Configure L3 Flow Table 4 7 1 Choose Table Click the diamond of L3 Flow Table 4 7 2 Add Entry 1 Click Flow Entry click the plus icon in the left of Flow Entries to add an entry 2 Click the new generated flow entry click Priority and input priority of the entry 3 Click Entry Field choose a key field input value and mask of the key field Input 0 for ignored match fields In this entry entry priority is 1 Entry field VPNID value 0100 and mask ffff Entry field DIP value 44332211 and mask fffffffP Attention VpnID v
4. groups meters counters instructions actions and metadata Below are some differences between POF and OpenFlow version 1 3 1 POF has no push MPLS push PBB and push VLAN actions These actions are replaced with the ADD_FIELD action 2 POF has no pop MPLS pop PBB and pop VLAN actions These actions are replaced with the DELETE_ FIELD action 3 POF has no decrement TTL action It is replaced with the MODIFY_FIELD action 4 The SET_FIELD action in POF does not have any protocol specific parameters like OFPXMT_OFB_IPV4_SRC and OFPXMT_OFB_TCP_SRC Instead the position and length of the filed in the packet are used as parameters These differences reflect the protocol oblivious nature of POF The forwarding plane does not need to understand the protocol type and the meaning of each field The protocol header fields are abstracted as simple offset and length tuples 2013 7 18 Page 5 Total 41 2 Glossary Metadata a register used to carry global information from one table to the next MM masked match table type The matching key can have arbitrary bits masked as don t care bits A typical example is ACL table LPM longest prefix match table type A typical example is IP FIB EM exact match table type A typical example is L2 MAC table VPN virtual private network VRF VPN routing and forwarding 2013 7 18 Page 6 Total 41 3 FEATURES This section describes the functions of the POF Controller Please re
5. 2 5 MAC 3 Type Input the offset of the metadata field Add New Action fieldName 1 DMAC SET FIELD FROM METADATA Metadata Offsetfbit ADD FIELD 1 2 3 Switches use this action to push tags such as VLAN or MPLS tag Click Instruction and New Instruction Item choose APPLY ACTIONS Click APPLY ACTIONS and Add New Action choose ADD FIELD Click ADD FIELD and Field Name input name of the new field 2013 7 18 Page 21 Total 41 Ad d M EIN A ctio A Fie name ADD FIELD Field Position Field Lenathibit Field Value 4 Input field position field length and field value Add New Action Field name TAG 12345673 ADD FIELD Field Position 96 Field Lengthibit 32 Field Value MODIFY FIELD Switches use this action to modify a field with an increment 1 Click Instruction and New Instruction Item choose APPLY ACTIONS 2 Click APPLY ACTIONS and Add New Action choose MODIFY FIELD 3 Click MODIFY FIELD and Field Name choose a field in the pull down menu 4 Inputincrement of the field Add New Action Field Mame 6 TTL x MODIFY FIELD Increment Refer to Section 4 7 3 for the configuration DELETE FIELD Switches use this action to pop tags such as VLAN or MPLS tag 1 Click Instruction and New Instruction Item choose APPLY ACTIONS 2 Click APPLY ACTIO
6. New Instruction item field name WRITE METADATA field offset bit field length bit field value 3 Click field value input the decimal value of the field J E I stru ctio n ite m fie id Mame 1 a VP ID WRITE METADATA field offset bit 8 field lengthibit 16 field value Refer to Section 3 7 and 4 5 3 3 10 5 WRITE_METADATA_FROM_PACKET Specify that the metadata field value is sourced from the input packet field 2013 7 18 Page 19 Total 41 1 Click Instruction and New Instruction Item choose WRITE_METADATA_FROM_PACKET 2 Click WRITE METADATA FROM PACKET and metadata name choose a field in the pull down menu J Er Fl str W Hi on ite ITI meta d ata Name WRITE METADATA FROM PAc metadata offset bit write length bit 1 Input Port 1 VPHID field offset bit 3 Click field offset and input the offset of the packet field J E n str W cti an ite m meta d dta name 1 i Y P M ID WIRITE METADATA FROM PAC Metadata offset bit 8 write length bit 16 field offset bit 3 10 6 APPLY ACTIONS SET FIELD A field includes name value and mask The field is from the packet template Switches use this action to write a field with a new value 1 Click Instruction and New Instruction Item choose APPLY ACTIONS 2 Click APPLY ACTIONS and Add New Action choose SET FIELD New Instruction ite
7. also be used as a part of the match fields for the flow entry in the table o Offset the field position in the metadata structure o Length length of the field The name is convenient for user configuration in GUI but meaningless to the POF enabled switch To reference a metadata field the switch uses just the offset and the length 2013 7 18 Page 11 Total 41 1 Double click Metadata label in the line Protocol TOE CO 2 Take turns to input name and length of each field and click OK to submit the field Name VPNID Offset 8 Length 16 O fi 3 Click SAVE confirm metadata configuration 4 Click the Metadata label in the line Protocol to see metadata configuration Refer to Section 4 2 for the configuration Attention Metadata definition 1s based on the switch Different switches may have different metadata size and different field definition In our switch the first 32bit of metadata is fixed to keep some packet information automatically get from hardware before POF process the other part is freely defined 3 8 Device Information Click the ch icon in the lower right corner to display device information Device information includes Oo Device info all the devices connected to the controller Device Table Resource Last 10 Error Msg Last 10 Packetin Msg Device R Total Port Hum Connected Port Num Total Table Num 30460152 0 45 15 eo Port info port information of
8. automatically get from hardware before POF process in our switch Input port is a fixed field for port ID of packet input and is automatically get from hardware before POF process in our switch VpnID is a freely defined field for VRF ID share by IPv4 and IPv6 2013 7 18 Page 27 Total 41 4 3 Add Tables 4 3 1 First Flow Table 1 2 3 4 5 Click the plus icon in the left of Add New Table add a new table Click the diamond to configure the new table First Flow Table name is fixed to FirstEntryTable Click Table Type choose the type in pull down menu Click Table Size input the table size press Enter to confirm Click Table Field double click the key fields in the protocol window to choose table field the selected field will turn green The click order is the key order Click SUBMIT to confirm table field configuration Key Length is automatically generated In this use case FirstEntryTable size 1s 128 FirstEntry Table type is OF_MM_TABLE FirstEntry Table fields are Dmac and Type Click SUBMIT in the bottom choose OK in the pop up window to confirm table configuration 4 3 2 L2 Flow Table 1 2 3 4 5 6 Click the plus icon in the left of Add New Table add a new table Click the diamond to configure the new table Click Table Name input the table name press Enter to confirm Cl
9. size is 128 L2 Flow Table type is OF_MM_TABLE L2 Flow Table fields are V IHL TOS Flags amp Offset TTL Protocol SIP and DIP 6 Click SUBMIT in the bottom choose OK in the pop up window to confirm table configuration 4 34 L3 Flow Table 1 Click the plus icon in the left of Add New Table add a new table Click the diamond to configure the new table 2 Click Table Name input the table name press Enter to confirm 3 Click Table Type choose the type in pull down menu 4 Click Table Size input the table size press Enter to confirm 5 Click Table Field double click the key fields in the protocol window to choose table field the selected field will turn green The click order is the key order Click SUBMIT to confirm table field configuration Key Length is automatically generated In this use case L2 Flow Table name is L3 Flow Table L2 Flow Table size is 128 L2 Flow Table type is OF LPM TABLE L2 Flow Table fields are VPNID in metadata and DIP 6 Click SUBMIT in the bottom choose OK in the pop up window to confirm table configuration 2013 7 18 Page 29 Total 41 4 4 Configure First Flow Table 4 4 1 Choose Table Click the diamond of First Flow Table 4 4 2 Add Entry 1 Click Flow Entry click the plus icon in the left of
10. the total number of the actions included in the group cumulated automatically Oo Action an ordered list of actions 1 Click Group button in menu bar Protocol Add New Protocol 2 Click Group and New Group to add a new group table Group Hew Group k 3 Click group and Group Type choose the type in pull down menu New Group SweitchID O OFPGT A he group Group Type OFPGT ALL OFPET SELECT Groupllo OFPGT_INDIRECT CounterID OFPGT FF ActionfMaum Action 4 Click Action and New Action configure actions of the group table See action configurations in the later chapters SwitchID O New Actoin SEMEEN Group Type OFPGT ALL 3ET_ FIELD COUNTER Groupld SET FIELD FROM METADATA CounterlID ADD FIELO ActionMum MODIFY FIELD Action Bsi M 0p1 86 2013 7 18 Page 8 Total 41 5 ActionNum and GroupID are automatically generated Click SAVE button to submit all group configurations Refer to Section 5 2 for the configuration 3 5 Configure Meter A meter measures the rate of packets assigned to 1t and enables controlling the rate of those packets Meters are attached directly to flow entries Any flow entry can specify a meter in its instruction The meter measures and controls the aggregated rate of all the flow entries to which it is attached POF Controller only defines the meter as a rate limiter The rate is the maximum output rate POF Controlle
11. Contents User Manual Or POR Controller aoine n A E ENNER l Ss A E E T E an Guatnere tance l A 1310076181 E e 0 PO SSS II re en rr N EE IIN PET 5 2 GOSS A Gy chet EN SK EN U tyota IAN SUUTA tl a 6 5 FEATURE ssa a e o tea 7 3 1 Nave anda AMA aussies dotada aa 7 SZ RESIZE WOW nassu ean STa masa S mi Se KANA sT ei a KS i t k et N k et t yt t v st eett tei 7 3 3 SEIS SINISIN maana A a R 7 3 4 Contreras MK ehe n 8 3 5 CO E o E E E ao A E T 9 3 6 COME tre POLO COW aces re artesian aa 10 3 7 contigure Motadal asasen E dvoianihatautead 11 3 8 Device tor E E eee Otan 12 3 9 Configure Flow E aDIC ansaan ast sanotaa aa a ia 13 SO Conie POW EN oie 16 AIOT GOTO TABLE init A mesat 17 910 2 GOTO DIRECT TABLE tdi dida 18 SAUS METER iia 19 3104 WRITE METADATA sa 19 3 10 5 WRITE METADATA FROM PACKET cocooocccccnnncoccncnnonccnnnnnanoss 19 OO APPLY ACTION Si as 20 SET FIELD dis 20 COUNTER cooler 21 SET_FIELD_FROM_METADATA coccccccnnccccnnnnccncnnonncnncnnonccncnnonnonos 21 ADD FIEED did dd 21 MODIFY Ple Ducados 22 DELETE TELDE 22 2013 7 18 Page 1 Total 41 User Manual for POF Controller GROUP aoa cg Nea ana asu du anaes Mangan tance 25 A TTK eet 23 DROP saca a pases 24 PACKE TIN stores ola kasvata 24 a IPA Unmkast Use Case Montiel 26 4 1 O m elt ei Dine eee 26 4 2 Baste Contour 27 4 3 A iAtetatt aanceaat ao Nat n mutta aa Pa KoT lutsiatee dont laeiramantienetad 28 Al ESC Table oia 28 2 120010 7 TA 0 caer ee ee S T
12. Flow Entries to add an entry 2 Click the new generated flow entry click Priority and input priority of the entry 3 Click Entry Field choose a key field input value and mask of the key field Input 0 for ignored match fields In this entry entry priority is 1 Entry field DMAC value 0 and mask 0 Entry field Type value 0800 and mask ffff 4 4 3 Configure Instruction Action 1 GOTO TABLE 1 Click Instruction and New Instruction Item choose GOTO_TABLE 2 Click GOTO_TABLE and then click Next TableID choose L2 Flow Table in the pull down menu create connection between First Flow Table and L2 Flow Table 3 Click Packet Offset byte input the packet offset with the value 0 4 Click Submit in the bottom to confirm the configuration of First Flow Table 4 5 Configure L2 Flow Table 4 5 1 Choose Table Click the diamond of L2 Flow Table 4 5 2 Add Entry 1 Click Flow Entry click the plus icon in the left of Flow Entries to add an entry 2 Click the new generated flow entry click Priority and input priority of the entry 3 Click Entry Field choose a key field input value and mask of the key field Input 0 for ignored match fields In this entry entry priority is 1 Entry field Input Port value 01 and mask ff 4 5 3 Configure Instruc
13. Input 0 for ignored match fields In this entry entry priority is 1 Entry field DMAC value 0 and mask 0 Entry field Type value 0888 and mask ffff 6 4 3 Configure Instruction Action 1 GOTO_TABLE 1 Click Instruction and New Instruction Item choose GOTO_TABLE 2 Click GOTO_TABLE and then click Next TableID choose IPvX Parse Flow Table in the pull down menu create connection between First Flow Table and IPvX Parse Flow Table 3 Click Packet Offset byte input the packet offset with the value 0 4 Click Submit in the bottom to confirm the configuration of First Flow Table 6 5 Configure IPvX Parse Flow Table 6 5 1 Choose Table Click the diamond of IPvX Parse Flow Table 6 5 2 Add Entry 1 Click Flow Entry click the plus icon in the left of Flow Entries to add an entry 2 Click the new generated flow entry click Priority and input priority of the entry 3 Click Entry Field choose a key field input value and mask of the key field Input 0 for ignored match fields In this entry entry priority is 1 Entry field Protocol value 0999 and mask ffff Other entry fields value 0 and mask 0 6 5 3 Configure instruction Action 1 GOTO_TABLE 1 Click Instruction and New Instruction Item choose GOTO_TABLE 2 Click
14. NS and Add New Action choose DELETE FIELD 3 Click DELETE FIELD input offset and length of the field to be deleted Add New Action Offsetibiti 96 DELETE FIEUD Lenathrbit CALCULATE_CHECKSUM When a packet field changes the checksum field of the packet needs to be updated For example when the IPv4 TTL decreases the checksum of IPv4 needs to be updated This action needs to set the offset length of the checksum field and the start position and the data range covered by the checksum calculation 2013 7 18 Page 22 Total 41 This action includes the following parameters eo Checksum Position the position of the checksum field in the packet O Checksum Length the length of the checksum field o Start Position the start position of the data for the checksum calculation in the packet o Cal Length the length of the data covered by the checksum calculation 1 Click Instruction and New Instruction Item choose APPLY ACTIONS 2 Click APPLY ACTIONS and Add New Action choose CALCULATE CHECKSUM 3 Click CALCULATE_CHECKSUM input checksum position checksum length start position and cal length Add New Action checkSum Position 192 160 CALCULATE CHECKSUM checkSum Length 16 start Position 112 cal Length Refer to Section 4 7 4 for the configuration GROUP Attach one group entry to the flow entry All the actions included in the group wi
15. SOIN ete een en een eon oe ee eee tea 28 4 5 7 E aise TOW A ec nemtasaetentenaaea aabertaeat enters 29 LA 125 TOW A E m 29 4 4 Contisure First Plow Table sacd a icon 30 et WGCHOOSE TAD le esse a E a 30 A A adas 30 4 4 3 Configure Instruction Action 1 GOTO TABLE ooonccnnccnnnncnnnno 30 4 5 Comte ate L2 Flow Table olaaa 30 ASN EROS Lal ies 30 4 92 ET 30 4 5 3 Configure Instruction Action 1 WRITE METADATA 30 4 5 4 Configure Instruction Action 2 GOTO TABLE ooocccnnccnnnncnnnno 31 4 6 Contisure L gt Parse Flow LablS ns 31 SA A nes N N 31 BOD AO EAN ad 31 4 6 3 Configure Instruction Action 1 GOTO_TABLE oooccccnccnnnncnnnns 31 4 7 Contistre Lo Flow Tablero 32 Ai NS O A N E E a2 AZ AA Te INAV sige ctestasnes min n E a N e SEN a T aE 52 4 7 3 Configure Instruction Action 1 MODIFY FIELD 32 4 7 4 Configure Instruction Action 2 CALCULATE CHECKSUM 32 2013 7 18 Page 2 Total 41 4 7 5 Configure Instruction Action 3 SET FIELD ooocccnccnnnnccnnnicnnnns 32 4 7 6 Configure Instruction Action 4 OUTPUT ooccccnccnnnnccnnnccnnnicnnnns 33 4 8 SAA A tal S n aa an oe en ERE erent pe eae 33 S APT Multicast Use Case PUtorial 23 5 sents ais 34 5 1 ONCE VIO W lassa Gastesmsadaeinaas aubasmo N Sas Anaa aan L ISTAa N Kaon othL sinat kea carey Alesmai maake v t 34 92 Contistire Group Table AASEN 34 SZ Create Group Table naa te 34 22 Conheure Actio
16. The configure process of the IPv4 unicast use case is as follows 4 2 Basic Configuration First select the switch in the pull down menu on the right side of Switch Second configure protocol of the flow 1 Click plus icon on the right side of Protocol 2 Take turns to input name and length of each field and click OK to submit the field 3 Click SAVE enter protocol name and click SAVE to confirm protocol configuration In this use case protocol fields are Dmac 48b1t Smac 48b1t Type 16bit V 4b1t IHL 4bit TOS 8bit TotalLength 16bit ID 16bit Flags amp Offset 16bit TTL 8bit Protocol 8bit Checksum 16bit SIP 32bit and DIP 32bit Protocol name is ETH IPv4 4 Click the protocol name label in the line Protocol to see the protocol configuration Last configure metadata of the flow 1 Double click Metadata label in the line Protocol 2 Take turns to input name and length of each field and click OK to submit the field In this use case metadata fields are Packet Length 16bit Input port 8bit Rsvd 8bit VpnID 16bit 3 Click SAVE confirm metadata configuration 4 Click the Metadata label in the line Protocol to see metadata configuration Packet Length is a fixed field for packet length in bytes and is
17. a packet template named IPv4 can be defined to include all the IPv4 header fields The Ethernet packets are processed in the first flow table get a matched flow entry and then go to the second flow table for IPv4 processing We can also define a packet template to cover layer 2 layer 3 and layer 4 headers even the payload data 1 Click plus icon on the right side of Protocol Protocol 2 Take turns to input name and length of each field and click OK to submit the field Offset of the field 1s automatically generated WOOD YE N Mame Type Offset 96 Length 16 O i 2013 7 18 Page 10 Total 41 3 Click SAVE enter protocol name and click SAVE to confirm protocol configuration Enter Protocol Name 4 Click the protocol name label in the line Protocol to see the protocol configuration Refer to Section 4 2 for the configuration 3 7 Configure Metadata POF enabled switch contains multiple flow tables The POF pipeline processing defines how packets interact with those flow tables Metadata is in fact a register that is used to carry global information between tables A table process can record a value in the metadata and the value can be used in another table process The metadata contains multiple fields Each field is referenced by the following items e Name user defined string for reference in instructions WRITE METADATA and WRITE METADATA FROM PACKET A metadata field can
18. all the devices Each of the network cards will have a Port ID 2013 7 18 Page 12 Total 41 Device Table Resource Last 10 Error Msg Last 10 Packetin Msg Device ID L Port ID ares Mame Config state Current Feature 9b450152 0021904560152 jetho 00010000 00000004 00000003 Choose POFEnable in the rank OpenFlow Enabled to enable POF forwarding for a port Packetin Msg Current Feature Advertised o suportted Peer Current Speed Max Speed OpenFlow Enabl 10000003 0000000a 0000000a 00000000 00000000 POFEnable Flow table resource the number of counter meter group table and table entry supported by each device Device EE ee en ee Last 10 Error Msg Last 10 Packetin Msg Device ID Type Counter W Meter Mum Group Mum 90460152 OFRRT FLOW TABLE 1024 1024 O Recent error messages Last 10error messages Packet In messages Last 10 packet in messages 3 9 Configure Flow Table A flow table descriptor includes the following fields e Table ID uniquely identifying one table assigned automatically o Table Name a user defined string for reference in GUI Oo Switch ID the device ID select one device for flow table o Table Type select one from MM LPM EM and linear The type determines how to execute the match process to get a flow entry in the table For an MM table the non wildcard bits in the match keys will be omitted in the match process For an LPM table t
19. alue 0100 is hexadecimal equals to decimal 0256 in 4 5 3 4 7 3 Configure Instruction Action 1 MODIFY FIELD 1 Click Instruction and New Instruction Item choose APPLY ACTIONS 2 Click APPLY ACTIONS and Add New Action choose MODIFY FIELD 3 Click MODIFY FIELD and Field Name choose a field in the pull down menu 4 Input increment of the field In this instruction field name is TTL Increment is 1 4 7 4 Configure Instruction Action 2 CALCULATE CHECKSUM 1 Click Instruction and New Instruction Item choose APPLY ACTIONS 2 Click APPLY ACTIONS and Add New Action choose CALCULATE CHECKSUM 3 Click CALCULATE_CHECKSUM input checksum position checksum length start position and cal length In this instruction checksum position is 192 Checksum length is 16 Start position is 112 Cal length is 160 4 7 5 Configure Instruction Action 3 SET FIELD 1 Click Instruction and New Instruction Item choose APPLY ACTIONS 2013 7 18 Page 32 Total 41 2 Click APPLY ACTIONS and Add New Action choose SET FIELD 3 Click SET_FIELD and FieldName choose a field in the pull down menu 4 Input value and mask of the field In this instruction field name is DMAC Field value is 123456789ABC Field mask is ffffffffffff Attent
20. e Mac address of Tester 6 6 4 Configure Instruction Action 2 OUTPUT 1 Click Instruction and New Instruction Item choose APPLY ACTIONS 2 Click APPLY ACTIONS and Add New Action choose OUTPUT 3 Click OUTPUT and outputPortID choose a port in the pull down menu 4 Input metadata offset bit metadata length bit and packet offset byte In this instruction output port ID is 2 Metadata offset is 0 Metadata length is 0 Packet offset is 0 5 Click Submit in the bottom to confirm the configuration of L3 Flow Table Attention OutputPortID is based on your switch Different switches may have different network cards and different port ID Here port ID of network card that packet output is 2 2013 7 18 Page 40 Total 41 6 7 Run Use Case Use tester to send following packet to POF switch Eth IPVX Dmac 48 Smac 48 Type 16 DIP 64 SIP 64 Protocol 16 010203040506 0708090A0BOC 0888 1122334455667788 8877665544332211 0999 2013 7 18 Page 41 Total 41
21. econd configure protocol of the flow 1 Click plus icon on the right side of Protocol 2 Take turns to input name and length of each field and click OK to submit the field 3 Click SAVE enter protocol name and click SAVE to confirm protocol configuration In this use case protocol fields are Dmac 48b1t Smac 48b1t Type 16bit DIP 64bit SIP 64b1t Protocol 16 Protocol name is ETH IPyX 4 Click the protocol name label in the line Protocol to see the protocol configuration Last configure metadata of the flow 1 Double click Metadata label in the line Protocol 2 Take turns to input name and length of each field and click OK to submit the field In this use case no user defined field is needed so metadata fields are fixed fields Packet Length 16bit Input port 8bit Rsvd 8bit 3 Click SAVE confirm metadata configuration 4 Click the Metadata label in the line Protocol to see metadata configuration 6 3 Add Tables 6 3 1 First Flow Table 1 Click the plus icon in the left of Add New Table add a new table Click the diamond to configure the new table First Flow Table name is fixed to FirstEntry Table 2 Click Table Type choose the type in pull down menu 3 Click Table Size input the table size press Enter to confirm 4 Click Table F
22. fer to the use cases for detailed configurations 3 1 Save and Load data To simplify the configuration POF controller can save all the configuration data into one file The configuration data can be loaded from the file for later usage Click File button in menu bar and choose Save Load to save load data Add New Proto p Add New Proto Max3creen Exit Max Screen Exit 3 2 Resize Window The GUI is full screen mode when startup In full screen mode click File and Max Screen to switch to max screen mode In max screen mode click File and Full Screen to switch to full screen mode Save Load Max Screen k Exit Add New Protoco 3 3 Select Switch Select the switch in the pull down menu on the right side of Switch 2013 7 18 Page 7 Total 41 3 4 Configure Group A group entry contains an ordered list of actions The ability for a flow entry to point to a group enables additional methods of forwarding A group entry includes the following items O Group type OFPGT_ALL Execute all actions in the group This group is used for multicast or broadcast forwarding The options OFPGT_SELECT OFPGT_INDIRECT OFPGT_FF are not supported in POF o Switch ID the device ID select one device for group O Group ID uniquely identifying the group assigned automatically Oo Counter ID updated when packets are processed by a group assigned automatically o Action Num
23. he entry with the longest matching prefix with the key 1s returned For an EM table the match key has to be matched bit by bit For a linear table an index is used to retrieve a table entry o Table Size size of the table should not exceed the resource limit of the device O Key length length of match key calculated automatically after selecting the table fields o Table Field the match fields selected to execute the match process against the table The match key source is from packet data or from metadata A direct table does not need to set 2013 7 18 Page 13 Total 41 the table field o Flow entry a flow table contains a number of flow entries A MM LPM or EM table needs to execute the match process to find the matching flow entry A direct table uses the entry index in the GOTO_DIRECT_TABLE instruction to retrieve the table entry directly 1 Click the plus icon in the left of Add New Table add a new table Click the diamond to configure the new table 2 Click Table Name input the table name press Enter to confirm Table ID y L2 Flow Table Table Mame NewTable SwitchID 9b460152 3 Click Table Type choose the type in pull down menu FirstEntry Table L Flow Tabl f A Hi Table Table ID Table Name L2 Flow Table OF MM TABLE OF LPM TABLE OF EM TABLE Table Type OF LINEAR TABLE SwitchID 9b460152 4 Click Table Size input the table size press Enter to co
24. ick Table Type choose the type in pull down menu Click Table Size input the table size press Enter to confirm Click Table Field double click the key fields in the protocol window to choose table field the selected field will turn green The click order is the key order Click SUBMIT to confirm table field configuration Key Length is automatically generated In this use case L2 Flow Table name is L2 Flow Table L2 Flow Table size is 128 L2 Flow Table type is OF MM TABLE L2 Flow Table field is Input Port in metadata Click SUBMIT in the bottom choose OK in the pop up window to confirm table configuration 2013 7 18 Page 28 Total 41 4 3 3 L3 Parse Flow Table 1 Click the plus icon in the left of Add New Table add a new table Click the diamond to configure the new table 2 Click Table Name input the table name press Enter to confirm 3 Click Table Type choose the type in pull down menu 4 Click Table Size input the table size press Enter to confirm 5 Click Table Field double click the key fields in the protocol window to choose table field the selected field will turn green The click order is the key order Click SUBMIT to confirm table field configuration Key Length is automatically generated In this use case L2 Flow Table name is L3 Parse Flow Table L2 Flow Table
25. ield double click the key fields in the protocol window to choose table field the selected field will turn green The click order is the key order Click SUBMIT to confirm table field configuration Key Length is automatically generated In this use case FirstEntryTable size is 128 FirstEntryTable type is OF MM TABLE FirstEntryTable fields are Dmac and Type 5 Click SUBMIT in the bottom choose OK in the pop up window to confirm table configuration 2013 7 18 Page 37 Total 41 6 3 2 IPvX Parse Flow Table 1 2 3 4 5 6 Click the plus icon in the left of Add New Table add a new table Click the diamond to configure the new table Click Table Name input the table name press Enter to confirm Click Table Type choose the type in pull down menu Click Table Size input the table size press Enter to confirm Click Table Field double click the key fields in the protocol window to choose table field the selected field will turn green The click order is the key order Click SUBMIT to confirm table field configuration Key Length is automatically generated In this use case IPvX Parse Flow Table name is IPvX Parse Flow Table IPvX Parse Flow Table size is 128 IPvX Parse Flow Table type is OF MM TABLE IPvX Parse Flow Table fields are DIP SIP and Protocol Clic
26. ion DMAC s based on your test environment here is the Mac address of Tester 4 7 6 Configure Instruction Action 4 OUTPUT 1 Click Instruction and New Instruction Item choose APPLY ACTIONS 2 Click APPLY ACTIONS and Add New Action choose OUTPUT 3 Click OUTPUT and outputPortID choose a port in the pull down menu 4 Input metadata offset bit metadata length bit and packet offset byte In this instruction output port ID is 2 Metadata offset is 0 Metadata length is 0 Packet offset is 0 5 Click Submit in the bottom to confirm the configuration of L3 Flow Table Attention OutputPortID is based on your switch Different switches may have different network cards and different port ID Here port ID of network card that packet output is 2 4 8 Run Use Case Use tester to send following packet to POF switch Eth IPv4 Dmac 48 Smac 48 Type 16 V 4 THL 4 TOS 8 TotalLength 16 010203040506 0708090A0BOC 0800 4 5 00 XXXX IPv4 ID 16 Flags_Offset 16 TTL 8 Protocol 8 checksum 16 SIP 32 DIP 32 0000 0000 64 06 XXXX 11223344 44332211 2013 7 18 Page 33 Total 41 5 IPv4 Multicast Use Case Tutorial 5 1 Overview In this use case POF switch should have at least two network cards The port IDs are 1 and 2 Send an ETH IPv4 packet to POF switch switch will multicast the packet f
27. k SUBMIT in the bottom choose OK in the pop up window to confirm table configuration 6 3 3 IPvX Flow Table 1 2 3 4 5 6 Click the plus icon in the left of Add New Table add a new table Click the diamond to configure the new table Click Table Name input the table name press Enter to confirm Click Table Type choose the type in pull down menu Click Table Size input the table size press Enter to confirm Click Table Field double click the key fields in the protocol window to choose table field the selected field will turn green The click order is the key order Click SUBMIT to confirm table field configuration Key Length is automatically generated In this use case IPvX Flow Table name is IPvX Flow Table IPvX Flow Table size is 128 IPvX Flow Table type is OF LPM TABLE IPvX Flow Table field is DIP Click SUBMIT in the bottom choose OK in the pop up window to confirm table configuration 6 4 Configure First Flow Table 6 4 1 Choose Table Click the diamond of First Flow Table 2013 7 18 Page 38 Total 41 6 4 2 Add Entry 1 Click Flow Entry click the plus icon in the left of Flow Entries to add an entry 2 Click the new generated flow entry click Priority and input priority of the entry 3 Click Entry Field choose a key field input value and mask of the key field
28. ll be executed step by step 1 Click Instruction and New Instruction Item choose APPLY ACTIONS 2 Click APPLY ACTIONS and Add New Action choose GROUP 3 Click GROUP and groupID choose group ID in the pull down menu Ad d M EV A ctio Pee qj rou HID ull GROUP Refer to Section 5 2 for the configuration OUTPUT The output action sets the output port It also decides how to assemble the output packet This action includes the following parameters Output port ID the ID of the output port Port ID of output network card Metadata Offset the offset of the metadata that will be appended in front of the packet e Metadata Length if not zero a part of the metadata will be appended in front of the packet This parameter denotes the length of the metadata that will be appended 2013 7 18 Page 23 Total 41 o Packet Offset if not zero the packet data bytes before this value will be trimmed off 1 Click Instruction and New Instruction Item choose APPLY ACTIONS 2 Click APPLY ACTIONS and Add New Action choose OUTPUT 3 Click OUTPUT and outputPortID choose a port in the pull down menu Add New Action outputP ortlD null OUTPUT metadata Offset bit O metadata Lengthibiti O packet Offsetihbyte O Add New Action outputPortlD 2 OUTPUT metadata Offsetfbif O metadata Lengthtbit O packet Off
29. m Add New Action SET_FIELD APPLY_ACTIONS COUNTER SET_FIELD_FROM_METADATA ADD FIELD MODIFY FIELD 3 Click SET FIELD and FieldName choose a field in the pull down menu Add New Action Fieldflame null SET FIELD valued 1 DMAR 2 5MA 3 Type DEELEY 4 Input hexadecimal value and mask of the field Add New Action FieldName 1 DMAC SET FIELD ValuedMma 112233445566 1 a i 2 Maski 2013 7 18 Page 20 Total 41 Refer to Section 4 7 5 for the configuration COUNTER 1 2 3 Add a counter in the entry Click Instruction and New Instruction Item choose APPLY ACTIONS Click APPLY ACTIONS and Add New Action choose COUNTER Click COUNTER and counter ID the counter ID is automatically generated New Instruction item Add New Action counterlD APPLY ACTIONS COUNTER SET_FIELD_FROM_METADATA The modified packet data field value can be from the metadata field The packet field value will be replaced by the metadata field value 1 2 3 Click Instruction and New Instruction Item choose APPLY ACTIONS Click APPLY ACTIONS and Add New Action choose SET FIELD FROM METADATA Click SET FIELD FROM METADATA and FieldName choose a field in the pull down menu Add New Action fieldName null SET FIELD FROM METADATA Metadata Offset bit 4 1 DMA
30. n I SET FIELD da 35 5 23 Conheure Action 2 OUTPUT coronas arado dardo inched 35 3 24 sConneure Action gt SET PIEGD aii 35 529 Eomtisute Acton A OUTPUT ao ana 35 5 Conticure Other Tables caca E 35 6 STP VX Use Case Tutorial lar 36 6 1 ONE VIC W a ooo ocios 36 6 2 Basic COM outa ON asar a 36 6 3 Ad die 37 03 1 First FOW Tablada 37 032 IPYX Parse Flow Talar tocan 38 0 30 IPVA Flow Tablas 38 6 4 Conte ure First Plow Table oa 38 OA Choose Tal iaa dai dd 38 642 Add EN A AS 39 6 4 3 Configure Instruction Action 1 GOTO_TABLE occcoccccnnccnnnncns 39 6 5 Conticure IPVA Parse Flow Tableta dd 39 Orde CHO PaDIS can ssa miles Saa 39 032 Ad EAU dida 39 6 5 3 Configure instruction Action 1 GOTO_TABLE ee 39 6 6 Conte Ure TIPS Flow Table aora 40 0 01 Choose Tabe iaa ad da 40 0 0 2 AATE NN susanna A 40 6 6 3 Configure Instruction Action 1 SET FIELD ooccccnccnnnnccnnnnnn 40 2013 7 18 Page 3 Total 41 6 6 4 Configure Instruction Action 2 OUTPUT 6 7 Run Use Casen desa dd 2013 7 18 Page 4 Total 41 1 Introduction This document describes the functions of the POF Protocol Oblivious Forwarding The content here is mainly about how to use the POF Controller GUI The target readers are the researchers developers and telecom engineers who relate to the router switch especially the software defined network The prototype supports most features of OpenFlow version 1 3 such as multiple tables
31. nfirm 2013 7 18 Page 14 Total 41 ircrentrye a 7 Flow sh mi Add New FirstEntry Table lv L2 Flow Tabl Table Table ID 123 Table Nara 2 Flow Table SwitchID 9b460152 Table Type OF MM TABLE Table Size 5 Click Table Field double click the key fields in the protocol window to choose table field the selected field will turn green The click order is the key order Click SUBMIT to confirm table field configuration Key Length is automatically generated Now select field above SUBMIT CANCEL 6 Click SUBMIT in the bottom choose OK in the pop up window to confirm table configuration Es 1 You have submitted the flow table 2013 7 18 Page 15 Total 41 Refer to use case for the configuration 3 10 Configure Flow Entry A flow entry includes the following items O Flow entry ID uniquely identifying one entry assigned automatically o Priority matching precedence of the flow entry O is the lowest priority The larger value means higher priority Oo Entry field packet data or metadata fields to match against These fields inherit from the table fields for a MM LPM and EM table No entry field needs to be set for a linear table An entry field contains ID name offset length value and mask The ID name offset and length inherit from the table field which cannot be modified Only the value and mask need to be set Oo Instruction the pipeline processing instructions
32. ollows 1 Click Instruction and New Instruction Item choose APPLY ACTIONS 2 Click APPLY ACTIONS and Add New Action choose GROUP 3 Click GROUP and groupID choose group ID 1 in the pull down menu create connection between L3 Flow Table and group table 2013 7 18 Page 35 Total 41 6 IPvX Use Case Tutorial 6 1 Overview POF switch Port ID 1 MAC 07 08 09 0A 0B 0C Tester MAC 01 02 03 04 05 06 IP 0x1122334455667788 MAC 12 34 56 78 9A BC IP 0x8877655544332211 In this use case you ll send an ETH IPvX packet to POF switch Following actions are needed to forward this packet First lookup first flow table to parse L2 header Second parse IPvX packet Finally get routing information modify fields in packet and send this packet IPvX Flow Table Three tables should be configured FIH First IPvX Parse Flow Table Flow Table SetField DMac GotoTable ETH First Flow Table Goto Table Keys DMAC and ETH Type Instructions GotoTable IPvX parse flow table IPvX Parse Flow Table Keys DIP SIP and Protocol Instructions GotoTable IPvX flow table IPvX Flow Table Keys DIP Instructions SetField Dmac and Output The configure process of the IPvX use case is as follows Reference the POF tutorial 6 2 Basic Configuration First select the switch in the pull down menu on the right side of Switch 2013 7 18 Page 36 Total 41 S
33. r supports only the pass or drop action to the packet When the output rate exceeds the rate specified by the meter the packet is dropped A meter includes the following items o Switch ID the device ID select one device for meter o Meter ID uniquely identifying one meter assigned automatically O Rate The maximum output rate The unit is kbps for the total frame length 1 Click Meter button in menu bar Protocol Add New Protoco 2 Input the meter rate click the icon to submit Meter ID is automatically generated 3 Click the icon if you want to delete a meter ID 4 Click SAVE button to submit all meter configurations MeterID MeterRate kbps 0 100 1 200 200 SAVE Cancel 2013 7 18 Page 9 Total 41 Attention The meter is single rate and we support only pass or drop action to the packet 3 6 Configure Protocol One packet contains multiple fields Each field includes a name an offset 1n bit unit and a length in bit unit The packet has a name too and the name can show the packet protocol In the latter table configuration 1t needs to select the packet name first and then select the fields of the packet POF Controller defines a packet template as only one protocol layer header For example a packet template named Ethernet can be defined to include these fields o Destination offset is O length is 48 Oo Source offset is 48 length is 48 o Type offset is 96 length is 16 Then
34. rom these output ports ETH First L3 Parse L3 Flow Table o able L2 Flow Table Flow Table Group Table ModField SetField TTL 1 DMac GotoTable teme racala CalChecksum Output VpnlD GototTable SetField key 1 GotoTable Group DMac Output o ETH First Flow Table L2 Flow Table L3 Parse Flow Table are same as IPv4 unicast use case o L3 Flow Table is similar to IPv4 unicast use case in 4 7 has different instructions e Group table is used for multicast encapsulate different L2 headers choose different output channels to send packet Actions Set Field Dmac Output Port1 Set Field Dmac and Output port2 Configure process of Ipv4 multicast use case 1s as follows 5 2 Configure Group Table Configuration of packet metadata and meter is same as IPv4 unicast use case 5 2 1 Create Group Table 1 Click Group button in menu bar 2 Click Group and New Group to add a new group table 3 Click group and Group Type choose the type in pull down menu In this use case Group Table type is OFPGT ALL 4 Click Action and New Action configure actions of the group table See action configurations in Section 5 2 2 to Section 5 2 5 5 ActionNum and GroupID are automatically generated Click SAVE button to submit all group configurations 2013 7 18 Page 34 Total 41 5 2 2 Configure Action 1 SET FIELD 1 Click Action and New Action
35. setibvie Please Ent Refer to Section 4 7 6 for the configuration DROP Usually an input packet will match some flow entry and eventually be output If the input packet matches the default flow entry it may take the drop action The default flow entry has wildcard match fields and the lowest priority 0 1 Click Instruction and New Instruction Item choose APPLY ACTIONS 2 Click APPLY ACTIONS and Add New Action choose DROP 3 Click DROP and drop reason choose reason in the pull down menu Add New Action drop reason null DROP OFPDT TIMEOUT N OFPDT HIT MISS OFPDT UNKNOW PACKET IN This action sends the packet to the controller 1 Click Instruction and New Instruction Item choose APPLY ACTIONS 2 Click APPLY ACTIONS and Add New Action choose PACKET IN 3 Click PACKET IN and packetin reason choose reason in the pull down menu 2013 7 18 Page 24 Total 41 Add New Action packetin reason null PACKET_IN OFPCPT TIMEOUT OFPCPT HY MISS OFPCPT UNKNOW 2013 7 18 Page 25 Total 41 4 IPv4 Unicast Use Case Tutorial 4 1 Overview POF switch Port ID 1 MAC 07 08 09 0A 0B 0C Tester MAC 01 02 03 04 05 06 IP 17 34 51 68 0x11223344 MAC 12 34 56 78 9A BC IP 68 51 34 17 0x44332211 MAC 23 45 67 89 AB CD IP 68 51 34 17 0x44332211 In this use case you ll send an ETH IPv4 packet to POF
36. switch Following actions are needed to forward this packet First lookup first flow table to parse L2 header Second get port control information through input port Third parse L3 packet and determine whether to do ACL according to the packet content Finally get routing information modify fields in packet and send L3 Parse L3 Flow Table Flow Table ModField TTL 1 this packet Four tables should be configured EIH First Flow Table L2 Flow Table CalChecksum WriteMetadata GotoTable VpnID GototTable SetField key 1 GotoTable DMac Output ETH First Flow Table It 1s equivalent to the L2 packet parse table Parse L2 header to get L3 packet type Keys DMAC and ETH Type Instructions GotoTable L2 Flow Table L2 Flow Table It is equivalent to the interface table Get VpnID for next table Keys input port from metadata Instructions WriteMetadata VpnID and GotoTable L3 Parse Flow Table L3 Parse Flow Table It is equivalent to the L3 packet parse table Parse L3 header and determine whether to do ACL in this use case go to L3 Flow Table directly Keys Version IHL TOS Flags amp Offset TTL Protocol SIP and DIP 2013 7 18 Page 26 Total 41 Instructions GotoTable L3 Flow Table L3 Flow Table It is equivalent to the FIB table Get output port modify packet and send packet Keys VpnID from metadata and DIP Instructions ModifyField TTL 1 CalChecksum SetField Dmac and Output
37. table ID denotes the next flow table O Entry Index denotes the index of the flow entry in the next flow table o Packet offset denotes the number of bytes that should be skipped before extracting match fields from the packet The match fields are denoted in the table field of the next table 1 Click Instruction and New Instruction Item choose GOTO_DIRECT_TABLE 2 Click GOTO_DIRECT_TABLE and nextTableID choose a next table ID in the pull down menu New Instruction item nextTableld GOTO_DIRECT_TABLE Entry Index Packet Offset byte 25 NewTable a p 1 2013 7 18 Page 18 Total 41 3 Click Packet Offset byte input the packet offset Entry Index is automatically generated PJ Eru instruction item nextTableld E 26 Direct Table 1 GOTO DIRECT TABLE Entry Index PacketOffset byte 3 10 3 METER Assign a meter ID for the flow entry 1 Click Instruction and New Instruction Item Choose METER 2 Click METER and meterID kbps choose a meter rate in the pull down menu Mew Instruction item meterlDikbps METER 3 10 4 WRITE METADATA Set the metadata field value for the subseguent processing The metadata field contains name offset length and value 1 Click Instruction and New Instruction Item choose WRITE METADATA 2 Click WRITE METADATA and field name choose a field in the pull down menu
38. tion Action 1 WRITE_METADATA 1 Click Instruction and New Instruction Item choose WRITE_METADATA 2 Click WRITE_METADATA and field name choose a field in the pull down menu 2013 7 18 Page 30 Total 41 3 Click field value input the value of the field In this instruction field name is VPNID Field value 1s 0256 Attention Input Port is based on your switch Different switches may have different network cards and different port ID Here port ID of network card that packet input is 1 VpnID value 0256 is decimal equals to hexadecimal 0100 in 4 7 2 4 54 Configure Instruction Action 2 GOTO TABLE 1 Click Instruction and New Instruction Item choose GOTO TABLE 2 Click GOTO TABLE and then click Next TableID choose L3 Parse Flow Table in the pull down menu create connection between L2 Flow Table and L3 Parse Flow Table 3 Click Packet Offset byte input the packet offset with the value 0 4 Click Submit in the bottom to confirm the configuration of L2 Flow Table 4 6 Configure L3 Parse Flow Table 4 6 1 Choose Table Click the diamond of L3 Parse Flow Table 4 6 2 Add Entry 1 Click Flow Entry click the plus icon in the left of Flow Entries to add an entry 2 Click the new generated flow entry click Priority and input priority of the entry 3 Click Entry Field
39. try Frig rity ale Flow Entry Entry Field Flow Entry Counter 3 10 1 GOTO_TABLE This instruction is used to direct the packet to the next flow table in the pipeline process The next flow table type should be MM LPM or EM This instruction includes the following parameters o Next table ID denotes the next flow table o Packet offset denotes the number of bytes that should be skipped before extracting match fields from the packet The match fields are denoted in the table field of the next table 1 Click Instruction and New Instruction Item choose GOTO_TABLE 2013 7 18 Page 17 Total 41 F Overy t j v I D J E ns 1 ruc 1 or 1 EITI G O T O J T A E L Priority 1 GOTO DIRECT TABLE Entry Field METER WRITE_METADATA Counter WRITE METADATA FROM PA APPLY ACTIONS 2 Click GOTO_TABLE and then click Next TableID choose a next table ID in the pull down menu J Ein i str W cti or ite mi MN ext Ta b E ID SSB ae saa oy oa Packet Offset byte 0 L2 Flow Tate 3 Click Packet Offset byte input the packet offset New Instruction item Next TablelD 0 L2 Flow Table GOTO TABLE Packet Offset byte Refer to for the configuration 3 10 2 GOTO_DIRECT_TABLE This instruction is used to direct the packet to the next flow table in the pipeline process The next flow table is a direct table This instruction includes the following parameters o Next
40. which will be executed when the flow entry is matched against packets O Counter count the number of times the flow entry is matched updated for each matching packet Refer to use case for the configuration 1 Click Flow Entry click the plus icon in the left of Flow Entries to add an entry TableID 1 Table Name L2 Flow Table SwitchID 00460152 Table Type OF_MM_TABLE Table Size 128 Key Length 8 Table Field Flow Entry 2 Click the new generated flow entry click Priority and input priority of the entry FlowentrylD Flow Entry Priority Entry Field Counter 2013 7 18 Page 16 Total 41 3 Click Entry Field choose a key field input hexadecimal value and mask of the key field Input 0 for ignored match fields FlowentryID name Type Priority 1 jal lt 3 offs Entry Field length 16 value Ox 0800 Counter maski Ox 4 Click Instruction configure instructions of the entry See action configurations in the later chapters 5 Click SUBMIT in the bottom choose OK in the pop up window to confirm entry configuration i You have submitted the flow entrys mH To modify an existing flow entry select the flow entry click the right mouse button and then select the item Modify Select the item Delete to delete the flow entry The figure below shows how to modify or delete a flow entry FlowentryID 0 Flow E n

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