L2 / L3 Switches Internet Protocol (IP) Configuration
Contents
1. State is Init Virtual IP address is 100 100 100 1 Virtual MAC address is 00 00 5e 00 01 64 Master router is 0 0 0 0 Associated IP addresses 100 100 100 1 Advertise time is 100 secs Current priority is 254 Configured priority is 254 may preempt Configured Authentication Authentication key is pwd2 vlan10 vrID 200 State is Init Virtual IP address is 10 10 10 1 Virtual MAC address is 00 00 5e 00 01 c8 Master router is 0 0 0 0 Associated IP addresses 10 10 10 1 Advertise time is 255 secs Current priority is 100 Configured priority is 100 may preempt Configured Authentication Authentication key is pwd1 END Supermicro L2 L3 Switches Configuration Guide2. Follow the steps below to configure the DHCP Client Step Command Description Step 1 configure terminal Enters the configuration mode Step 2 interface vlan lt vlan id 1 4069 gt interface Enters the interface configuration loopback lt interface id 1 100 gt mode to specify the interface to be configured as a Layer 3 interface or loopback Step 3 no switchport Configures the router port Step 3 ip address dhcp Specifies which DHCP client to obtain the IP address from the DHCP server Step 4 exit Exits the interface configuration mode Step 5 renew dhcp vlan lt vlan id 1 4069 gt lt interface Optional Configures the DHCP client type gt lt interface id gt lease renew procedure Step 6 release dhcp vlan lt vlan id 1 4069 gt lt interface Optional Configures the DHCP client type gt lt interface id gt release procedure Step 7 end Exits the configuration mode Step 8 show ip interface Display the Layer 3 interface configuration Oo The VLAN should be created before configuring the VLAN client on that particular VLAN The no ip address dhcp command deletes the DHCP client configuration The example below shows the commands used to configure a DHCP Client SMIS config interface Gi 0 22 SMIS config if no switchport SMIS config if ip address dhcp Supermicro L2 L3 Switches Configuration Guide SMIS config if end SMISH show i
3. 0 0 0 8 is directly connected vlan20 C 192 168 100 0 24 is directly connected mgmt 1 4Static Route A static route defines an explicit path between two routers Manual reconfiguration of static routes is required whenever network changes occur Static routes use less bandwidth than dynamic routes No CPU cycles are used to calculate and analyze routing updates Routers forward packets using either route information from manually configured route table entries or by using the route information calculated with dynamic routing algorithms Use of Static Routes Supermicro L2 L3 Switches Configuration Guide Static routes can be used in environments where network traffic is predictable and the network design is simple Static routes are also useful for specifying a gateway of last resort a default router to which all non routable packets are sent Follow the steps below to configure a static route Step Command Description Step 1 configure terminal Enters the configuration mode Step 2 ip route lt prefix gt lt mask gt lt next hop gt Vlan lt vlan Configures the static route The VLAN id id 1 4069 gt lt interface type gt lt interface id gt and interface for this static route nullo lt distance 1 255 gt private Prefix The destination network IP address the route leads to Mask A valid IP subnet mask 1 4 1 Next hop specifies the next hop IP address Null Specifies a nu
4. host from its known IP address This mapping of MAC addresses to IP addresses is stored in a table called the ARP cache ARP is part of all Supermicro switches systems that run IP Though Supermicro switches are Layer 3 switches that forward packets based on IP address ARP is required for certain cases like default gateways or for pinging within the same subnet 1 5 1 1 Cache Timeout The ARP cache can contain both dynamic learned entries and static user configured entries Dynamic ARP entries are created in the ARP cache when the Layer 3 switch learns a devices MAC address from an ARP request or from the ARP reply from a device ARP entries are refreshed periodically otherwise they will time out and be deleted from the ARP cache 1 5 1 2 ARP Request Retry ARP requests can be resent by a device before confirming the host as unreachable The number of times ARP requests can be retransmitted is user configurable in Supermicro switches 1 5 1 3 Static ARP For hosts that do not support dynamic Address Resolution Protocol ARP static entries can be added by defining the static mapping between an IP address a 32 bit address and a Media Access Control MAC address a 48 bit address Static ARP entries in the ARP cache never time out The entries remain in the ARP table until they are removed by the user configuration Supermicro L2 L3 Switches Configuration Guide Defaults Parameter Default Value ARP request retries
5. information to the requesting client such as the IP address of the DNS server the default router and other configuration parameters 1 6 1 2 Additional Parameter Default Router amp DNS The DHCP server can be configured to assign additional parameters to the DHCP clients such as the IP address of the Domain Name System DNS server and the default router Supermicro L2 L3 Switches Configuration Guide The default route IP address should be on the same subnet as the client When a DHCP client requests an IP address the DHCP server accesses the default router list to select another router that the DHCP client is to use as the first hop for forwarding messages 1 6 1 3 Excluding IP Addresses By default the DHCP Server assumes all IP addresses in the configured DHCP address pool are available for assigning to DHCP clients If a particular address or range of addresses should not be assigned to DHCP clients users can configure these as excluded IP addresses 1 6 1 4 Utilization Threshold A DHCP address pool has a threshold associated with it If a pool s outstanding addresses exceed the high utilization threshold and SNMP trap signaling is enabled SNMP is notified 1 6 1 5 Lease DHCP supports three mechanisms for IP address allocation Automatic allocation the DHCP server assigns a permanent IP address to a client Dynamic allocation the DHCP server assigns an IP address to a client from the address pool for either a li
6. interface provides logical routing interfaces to VLANs on Layer Supermicro L2 L3 Switches Configuration Guide 2 switches lt is also called aSwitch Virtual Interface SVI Jand handles processing for all the packets associated with that VLAN Follow the steps below to configure a Logical Layer3 Interface Step Command Description Step 1 configure terminal Enters the configuration mode Step 2 Create a Layer 2 VLAN and add all required ports For details on configuring a Layer 2 VLAN refer to the VLAN Config guide at www supermicro com Step 3 interface vlan lt vlan id 1 4069 gt Entersthe interface configuration mode to specify the interface to be configured as a Layer 3 interface Step 4 ip address lt ip address gt lt ip address gt prefix Configures the IP address length lt subnet mask gt secondary ip address A valid IPv4 address ip address prefix length A valid IPv4 address with a prefix length of value 1 32 subnet mask A valid IP subnet mask Secondary Assigns multiple IP addresses to network interfaces Step 5 end Exits the configuration mode Step 6 show ip interface Displays the Layer 3 interface information The no ip address lt ip_addr gt command deletes the Layer 3 VLAN interface and resets it as a Layer2 VLAN The example below shows the commands used to configure a Logical Layer3 interface SMISH configure termina
7. 2 L3 Switches Configuration Guide DHCP pool index None DHCP network IP None Excluded address None Domain name None DNS server None NetBIOS name server None NetBIOS node type None DHCP option None Lease 3600 Utilization threshold 75 Default router None Hardware address None Client ID None Bootfile None Next server None DHCP ping None Offer reuse 5 1 6 1 9 1 Enabling a DHCP Server The DHCP server is disabled by default in Supermicro switches Follow the steps below to enable a DHCP server Step Command Description Step 1 configure terminal Enters the configuration mode Step2 service dhcp server Enable the DHCP server Step 3 end Exits the configuration mode Step 4 show ipdhcp server information Displays the DHCP server configuration details O The DHCP relay must be disabled before enabling the DHCP server The noservice dhcp server command disables the DHCP server 1 6 1 9 2 Configuring the DHCPPool Follow the steps below to configure the DHCP server pool Step Command Description Step 1 configure terminal Enters the configuration mode Step 2 ipdhcp pool lt index 1 2147483647 gt Creates a name for the DHCP server Supermicro L2 L3 Switches Configuration Guide address pool and enters the DHCP pool configuration mode Step 3 network lt ne
8. 3 ARP cache timeout 300 Static ARP entries None Follow the steps below to configure the ARP Step Command Description Step 1 configure terminal Enters the configuration mode Step 2 arp timeout lt seconds 30 86400 gt Optional Sets the length of time in seconds an Address Resolution Protocol ARP cache entry stays in the cache The range is 30 86400 seconds Note If there are frequent changes to cache entries in a network a shorter ARP timeout is recommended Step 3 arp lt ip address gt lt hardware address gt Vlan lt vlan Optional Globally associates an IP id 1 4069 gt lt interface type gt lt interface id gt address with a MAC address in the ARP Linuxvlan lt interface name gt Cpu0 cache ip address IP address in four part dotted decimal format corresponding to the local data link address hardware address Local data link address a 48 bit address Linuxvlan Interface name of a Linux VLAN interface Cpu0 Out of band management interface Step 4 iparp max retries lt value 2 10 gt Optional Sets the maximum number of ARP request retries in the range of 2 10 Step 5 end Exits the configuration mode Step 6 show iparp Displays the ARP table entries show iparp summary Displays a summary of the ARP table including dynamic and static entries show iparp information Displays the ARP configuration details Supermicro L2 L3 Switches Conf
9. County in the State of California USA The State of California County of Santa Clara shall be the exclusive venue for the resolution of any such disputes Super Micro s total liability for all claims will not exceed the price paid for the hardware product FCC Statement This equipment has been tested and found to comply with the limits for a Class A digital device pursuant to Part 15 of the FCC Rules These limits are designed to provide reasonable protection against harmful interference when the equipment is operated in a commercial environment This equipment generates uses and can radiate radio frequency energy and if not installed and used in accordance with the manufacturer s instruction manual may cause harmful interference with radio communications Operation of this equipment in a residential area is likely to cause harmful interference in which case you will be required to correct the interference at your own expense California Best Management Practices Regulations for Perchlorate Materials This Perchlorate warning applies only to products containing CR Manganese Dioxide Lithium coin cells Perchlorate Material special handling may apply See http www dtsc ca gov hazardouswaste perchlorate for further details Manual Revision 1 0 Release Date September 26 2013 Unless you request and receive written permission from Super Micro Computer Inc you may not copy any part of this document Information in this document is s
10. E 0 DHCPRELEASE 0 DHCPINFORM 0 Message Sent DHCPOFFER 0 DHCPACK 0 DHCPNAK 0 1 6 7 DHCP Client Supermicro switches can function as a Dynamic Host Configuration Protocol DHCP client to obtain configuration parameters such as an IP address from the DHCP server DHCP Discover DHCP Offer DHCP Request Q DHCP Ack DHCP DHCP Client Server Figure IP 3 DHCP Client 1 6 7 1 Release Client The release dhcpcommand starts the process to immediately release a DHCP lease for the specified interface After the lease is released the interface address is de configured Supermicro L2 L3 Switches Configuration Guide 1 6 7 2 Renew Client The DHCP client lease can be renewed by user configuration The renew dhcp command advances the DHCP lease timer to the next stage after which a DHCP REQUEST packet is sent to renew or rebind the lease e If the lease is currently in a BOUND state the lease is advanced to the RENEW state and a DHCPRENEW request is sent If there is no response to the RENEW request the interface remains in the RENEW state and the lease timer will advance to the REBIND state beforesending a REBIND request If a NAK response is sent in response to the RENEW request the interface IP address is de configured The original IP address for the interface must then be assigned by the DHCP server e If the lease is currently in a RENEW state the timer is advanced to the REBIND state and a DHCPREBIND request is sent
11. L3 Switches Configuration Guide Supermicro switches support Dynamic Host Configuration Protocol DHCP server DHCP client and DHCP relay agent functionality 1 6 1 DHCP Server The DHCP server implementation in Supermicro switches maintains a database of available IP addresses and configuration information When the DHCP server receives a request from a DHCP client the DHCP server determines the network to which the DHCP client is connected The DHCP server then allocates an IP address or prefix that is appropriate for the client DHCP servers typically grant IP addresses to clients only for a limited interval DHCP clients must either renew their IP address before that interval has expired or must stop using the address once the interval has expired The DHCP server can also be configured to assign additional parameters like default routers the IP address of the Domain Name System DNS server etc The DHCP server can accept broadcasts from locally attached LAN segments or from DHCP requests that have been forwarded by other DHCP relay agents within the network DHCP Discover DHCP Offer DHCP Request A DHCP Ack DHCP DHCP Server Client Figure IP 2 DHCP Server 1 6 1 1 DHCP Address Pool The DHCP server in Supermicro switches accepts requests for address assignment and renewals It assigns the addresses from predefined groups of addresses contained within DHCP address pools These address pools can also be configured to supply additional
12. SUPERMICRO L2 L3 Switches Internet Protocol IP Configuration Guide Revision 1 0 The information in this USER S MANUAL has been carefully reviewed and is believed to be accurate The vendor assumes no responsibility for any inaccuracies that may be contained in this document makes no commitment to update or to keep current the information in this manual or to notify any person organization of the updates Please Note For the most up to date version of this manual please see our web site at www supermicro com Super Micro Computer Inc Supermicro reserves the right to make changes to the product described in this manual at any time and without notice This product including software if any and documentation may not in gf67cbbwhole or in part be copied photocopied reproduced translated or reduced to any medium or machine without prior written consent IN NO EVENT WILL SUPERMICRO BE LIABLE FOR DIRECT INDIRECT SPECIAL INCIDENTAL SPECULATIVE OR CONSEQUENTIAL DAMAGES ARISING FROM THE USE OR INABILITY TO USETHIS PRODUCT OR DOCUMENTATION EVEN IF ADVISED OF THE POSSIBILITY OF SUCHDAMAGES IN PARTICULAR SUPERMICRO SHALL NOT HAVE LIABILITY FOR ANY HARDWARE SOFTWARE OR DATA STORED OR USED WITH THE PRODUCT INCLUDING THE COSTS OFREPAIRING REPLACING INTEGRATING INSTALLING OR RECOVERING SUCH HARDWARE SOFTWARE OR DATA Any disputes arising between manufacturer and customer shall be governed by the laws of Santa Clara
13. ay agent then retransmits the response on the local network Supermicro L2 L3 Switches Configuration Guide 1 6 8 1 Relay Agent Information Option The relay agent information option option 82 includes additional information about the DHCP relay agent when forwarding client originated DHCP packets to a DHCP server The relay agent will automatically add the circuit identifier sub option and the remote ID sub option to the relay agent information option and forward it to the DHCP server 1 6 8 2 Circuit ID Sub option In a Circuit ID agent sub option 1 is an ASCII string that identifies the interface on which a client DHCP packet is received 1 6 8 3 Remote ID Sub option In a Remote ID agent sub option 2 is an ASCII string assigned by the relay agent that securely identifies the client Defaults Parameter Default Value DHCP Relay status Disabled Relay Information Option Disabled Circuit ID None Remote ID None Follow the steps below to configure the DHCP relay Step Command Description Step 1 configure terminal Enters the configuration mode Step 2 service dhcp relay Enables the DHCP relay Step 3 ipdhcp server lt ucast_addr gt Configures the DHCP server IP address Step 4 ipdhcp relay information option Optional Enables the DHCP relay agent information option to be sent by the DHCP relay agent Step 5 ipdhcp relay circuit id lt circuit id gt Optional Spe
14. boot process of a DHCP client Step 4 ipdhcp option lt code 1 2147483647 gt This option can be used to configure ascii lt string gt hex lt Hex String gt ip the DHCP options for all pools lt address gt Step5 ipdhcp ping packets server offer reuse Optional Specifies that the DHCP lt timeout 1 120 gt server should ping a pool address before assigning it Server offer reuse Specifies the maximum timeframe after which an offered IP address can be returned to the pool of free addresses Step 6 end Exits the configuration mode Step 7 show ipdhcp server information Displays the DHCP server configuration details show ipdhcp server statistics Displays DHCP packet statistics O These commands delete values or resets the default values as applicable no ipdhcpbootfile no ipdhcp next server no ipdhcp option lt code 1 2147483647 gt no ipdhcp ping packets server offer reuse binding lt ip address gt The example below shows the commands used to configure DHCP Server SMISH configure terminal SMIS config service dhcp server SMIS config ipdhcp server 100 100 100 1 SMIS config ipdhcp pool 1 SMIS dhcp config network 200 200 0 0 255 255 0 0 SMIS dhcp config excluded address 200 200 20 20 200 200 20 30 SMIS dhcp config dns server 10 10 10 1 SMIS dhcp config domain name supermicro com SMIS dhcp config netbios name server 172 16 1 3 SMIS dhcp config netbios nod
15. cifies the Circuit ID sub option Step 6 ipdhcp relay remote id lt remote id name gt Optional Specifies Remote ID sub option Step 7 end Exits the configuration mode Step 8 show ipdhcp relay information Displays the DHCP relay configuration O The DHCP Server must be disabled before enabling the DHCP relay These commands delete values or reset default values as applicable noservice dhcp relay Supermicro L2 L3 Switches Configuration Guide no ipdhcp server lt ip address gt no ipdhcp relay information option no ipdhcp relay circuit id no ipdhcp relay remote id The example below shows the commands used to configure the DHCP relay SMIS configure terminal SMIS config service dhcp relay SMIS config ipdhcp server 172 1 3 15 SMIS config ipdhcp relay information option SMIS config end SMIS show ipdhcp relay information DHCP Relay Enabled DHCP Relay Servers only Enabled DHCP server 1 172 1 3 15 DHCP Relay RAI option Enabled Debug Level 0x0 No of Packets inserted RAI option O No of Packets inserted circuit ID suboption O No of Packets inserted remote ID suboption O No of Packets inserted subnet mask suboption O No of Packets dropped O No of Packets which did not have an RAI option inserted O 1 7VRRP There are several ways a LAN client can determine which router should be the first hop to a particular remote destination The client can use a dynamic process or a static c
16. e mac address Specifies the MAC address of a DHCP client in dotted hexadecimal notation 1 6 5 string ASCll format representation of a MAC address 1 6 6 address Specifies the IP address and network mask for a manual binding to a DHCP client Step 14 end Exits the configuration mode Step 15 show ipdhcp server pools Displays the DHCP pool configuration The no ipdhcp pool lt index 1 2147483647 gt command deletes the DHCP pool configuration These commands delete values or reset to default values as applicable no network no excluded address lt low address gt lt high address gt no domain name no dns server no netbios name server no netbios node type no default router no option lt code 1 2147483647 gt no lease no utilization threshold no host hardware type lt host hardware type 1 2147483647 gt client identifier lt client mac address gt option lt code 1 2147483647 gt 1 6 6 1 1 Configuring Other Parameters Follow the steps below to configure the DHCP server parameters Step Command Description Supermicro L2 L3 Switches Configuration Guide Step 1 configure terminal Enters the configuration mode Step 2 ipdhcpbootfile lt bootfile 63 gt Optional Specifies the name of the default boot image for a DHCP client Step 3 ipdhcp next server lt ip address gt Optional Configures the next server in the
17. e type h node SMIS dhcp config option 19 hex 1 Supermicro L2 L3 Switches Configuration Guide SMIS dhcp config lease infinite SMIS dhcp config utilization threshold 50 SMIS dhcp config host hardware type 1 client identifier 00 A0 23 C9 12 FF option 10 IP 10 10 10 1 SMIS dhcp config default router 192 168 1 10 SMIS dhcp config exit SMIS config ipdhcpbootfileabcboot SMIS config ipdhcp next server 172 17 10 3 SMIS config ipdhcp ping packets SMIS config end SMIS show ipdhcp server information DHCP server status Enabled Send ping packets Enabled Debug level None Server address reuse timeout 5 secs Next server address 172 17 10 3 Boot file name abcboot SMIS show ipdhcp server pools Pool Id 1 Subnet 200 200 0 0 Subnet mask 255 255 0 0 Lease time 2147483647 secs Utilization threshold 50 Start Ip 200 200 0 1 End Ip 200 200 255 255 Exclude address start IP 200 200 20 20 Exclude address end IP 200 200 20 30 Subnet Options Code 1 Value 255 255 0 0 Code 3 Value 192 168 1 10 Code 6 Value 10 10 10 1 Code 15 Value supermicro com Code 19 Value 1 Code 44 Value 172 16 1 3 Code 46 Value 8 Host Options Supermicro L2 L3 Switches Configuration Guide Hardware type 1 Client identifier 00 a0 23 c9 12 ff Code 10 Value 10 10 10 1 SMIS show ipdhcp server statistics Address pools 1 Message Received DHCPDISCOVER 0 DHCPREQUEST 0 DHCPDECLIN
18. egrated circuits ASICs which are hardware chips that can route traffic at very high speeds These ASICs are installed on the switching engine of a Layer 3 switch which traditionally switches frames at Layer 2 The ASICs allow the switching engine to also switch frames that contain packets sent between different VLANs Each ASIC is programmed with the information required to route traffic from one VLAN to another without having to pass the traffic through the CPU of the routing engine Advantages of Inter VLAN routing in L3 switches Supermicro L2 L3 Switches Configuration Guide e Layer 3 switches are much more cost effective than routers for delivering high speed inter VLAN routing e Layer 3 switches are enhanced Layer 2 switches and therefore have the same high port densities as Layer 2 switches Routers on the other hand typically have a much lower port density e Layer 3 switches can be configured to operate as a normal Layer 2 switch or Layer 3 switch as required Application of Inter VLAN routing The network can be divided based on the group or function of itsdevices For example an engineering department VLAN would only have devices associated with the engineering department while an HR VLAN would only have HR related devices With Inter VLAN routing the devices in each VLAN can talk to one another without all the devices being in the same broadcast domain To WAN via Router VLAN 100 VLAN 200 Layer3 Swi
19. er 3 interfaces support functionalities similar to a traditional router Routed ports are physical ports on the switch that act like a router interface with an IP address configured they do not belong to any VLAN Supermicro switches support Secondary IP addresses which are used when the same physical segment of the switch interface that is connected serves multiple logical networks Supermicro L2 L3 Switches Configuration Guide Follow the steps below to configure a Physical Layer3 Interface Step Command Description Step 1 configure terminal Enters the configuration mode Step 2 interface lt interface type gt lt interface id gt Enters the interface configuration or mode interface range lt interface type gt lt interface id gt 1 2 2 interface type may be any of the following gigabitethernet gi extreme ethernet ex qx ethernet qx 1 2 3 interface id is in slot port format for all physical interfaces To configure multiple interfaces use the interface range command To provide a range use a hyphen between the start and end interface numbers E g int range gi 0 1 10 1 2 4 To provide multiple interfaces or ranges separate with a comma E g int range gi 0 1 10 gi 0 20 1 2 5 If multiple interfaces are provided the next step will perform the particular configuration on all these interfaces Step 3 no switchport Configures the router por
20. er hosts on an IP network without prior setup of transmission channels or data paths UDP is suitable when error checking and correction is either not necessary or performed in the application avoiding the overhead of such processing at the network interface level The following features of IP implementation in Supermicro switches are covered in this document Layer3 Interface Inter VLAN routing Static Route ARP DHCP VRRP 1 2Layer 3 Interface The network layer or Layer 3 handles the routing of data in packets acrosslogical internetwork paths The data link layer or Layer 2 contains protocols that control the physical layer Layer 1 and data framing for transmission on the physical medium The Layer 2 function of filtering and forwarding data in frames between two segments on a LAN is known as bridging Supermicro switches support three types of Layer 3 interfaces e The Layer 3VLAN Interface combines the functionality of routing and bridging e The physical Layer 3 interface allows the switch to be configured like a traditional router It is also referred as a Routed Interface e The Loopback Interface is a logical interface that is always up It is not tied to any physical interface therefore it does not go down unless it is administratively shut down The Layer3 interface is used to e Allow traffic to be routed between VLANs e Provide Layer 3 IP connectivity to the switch 1 2 1 Physical L3 Interface The physical Lay
21. iguration Guide O These commands delete values or reset to default values as applicable no arp timeout no arp lt ip address gt no iparp max retries The example below shows the commands used to configure the ARP SMIS configure terminal SMIS config arp timeout 800 SMIS config iparp max retries 10 SMIS config arp 10 0 0 0 48 2C 6A 1E 59 3D vlan 1 SMIS config end SMIS show iparp Address Hardware Address Type Interface Mapping 10 0 0 0 48 2c 6a 1e 59 3d ARPA vlan1 Static SMISH show iparp summary 1 IP ARP entries with O of them incomplete SMIS show iparp information ARP Configurations Maximum number of ARP request retries is 10 ARP cache timeout is 800 seconds 1 6DHCP The Dynamic Host Configuration Protocol DHCP is based on the Bootstrap Protocol BOOTP which can automatically allocate reusable network addresses and configuration options to Internet hosts DHCP is built on a client server model where designated DHCP servers allocate network addresses and deliver configuration parameters to DHCP clients When a DHCP client requests an IP address from a DHCP server the client sends a DHCPDISCOVER broadcast message to locate a DHCP server A relay agent forwards the packets between the DHCP client and the server A DHCP server offers configuration parameters such as an IP address MAC address domain name and a lease for the IP address to the client in a DHCPOFFER unicast message Supermicro L2
22. l SMIS config vlan 10 SMIS config vlan ports Gi 0 22 untagged SMIS config vlan exit SMIS config interface vlan 10 SMIS config if ip address 10 10 10 1 255 255 255 0 SMIS config if end Supermicro L2 L3 Switches Configuration Guide le SMIS show ip interface mgmt is up line protocol is down Internet address is 192 168 100 102 24 Broadcast address is 192 168 100 255 Gateway 0 0 0 0 vlan10 is up line protocol is up Internet address is 10 10 10 1 24 Broadcast address is 10 10 10 255 1 2 9 Loopback Interface Supermicro switches support a loopback interface which is a virtual interface and is not connected to any other device Loopback interfaces are very useful since they will never go down unless the entire router goes down This is useful for managing routers because there will always be at least one active interface on the routers the loopback interface Follow the steps below to configure loopback interface Step Command Description Step 1 configure terminal Enters the configuration mode Step 2 interface loopback lt interface id 1 100 gt Enters interface configuration mode to specify the interface to be configured as a Layer 3 interface Step 3 ip address lt ip address gt lt ip address gt prefix Configure IP address length lt subnet mask gt ip address A valid IPv4 address ip address prefix length A valid IPv4 address with a prefix length of value 1 32
23. ll interface 1 4 2 Distance Specifies the administrative distance in the range of 1 to 255 The default is 1 Private Specifies whether this route can be shared with other routes when RIP is enabled Step 3 end Exits the configuration mode Step 4 show ip route lt ip address gt lt mask gt bgp Displays the route information connected ospf rip static summary When an interface goes down static routes through that interface are removed from the IP routing table When the next hop for the address is unreachable the static route is removed from the IP routing table The no ip route lt prefix gt lt mask gt lt next hop gt Vlan lt vlan id 1 4069 gt lt interface type gt lt interface id gt nullO private command deletes the static route Supermicro L2 L3 Switches Configuration Guide The example below shows the commands used to configure a static route SMISH configure terminal SMIS config vlan 10 SMIS config vlan ports Gi 0 21 untagged SMIS config vlan exit SMIS config interface vlan 10 SMIS config if H ip address 10 10 10 1 SMIS config if H exit SMIS config ip route 200 200 200 0 255 255 255 0 10 10 10 2 SMIS config end SMISH show ip route static S 200 200 200 0 24 1 via 10 10 10 2 1 5ARP The Address Resolution Protocol ARP feature finds the hardware address also known as the Media Access Control MAC address of a
24. micro L2 L3 Switches Configuration Guide no interface Vlan lt vlan id 1 4069 gt lt interface type gt lt interface id gt no vrrp lt vrid 1 255 gt ipv4 lt ucast_addr gt secondary no vrrp lt vrid 1 255 gt priority no vrrp lt vrid 1 255 gt preempt no vrrp lt vrid 1 255 gt text authentication no vrrp lt vrid 1 255 gt timer The example below shows the commands used to configure a VRRP SMISH configure terminal SMIS config vlan 10 SMIS config vlan ports Gi 0 15 untagged SMIS config vlan exit SMIS config interface vlan 10 SMIS config if ip address 172 1 10 1 SMIS config if end SMISH configure terminal SMIS config router vrrp SMIS config vrrp interface vlan 10 SMIS config vrrp if vrrp 200 ipv4 10 10 10 1 SMIS config vrrp if vrrp 200 preempt SMIS config vrrp if vrrp 200 priority 100 SMIS config vrrp if vrrp 200 text authentication pwd1 SMIS config vrrp if vrrp 200 timer 255 SMIS config vrrp if vrrp 100 ipv4 100 100 100 1 SMIS config vrrp if vrrp 100 priority 254 SMIS config vrrp if vrrp 100 text authentication pwd2 SMIS config vrrp if vrrp 100 timer 100 SMIS config vrrp if end SMIS show vrrp P indicates configured to preempt Interface vrlD Priority P State Master AddrVRouterAddr vlan10 100 254 P Init 0 0 0 0 100 100 100 1 vlan10 200 100 P Init 0 0 0 0 10 10 10 1 SMIS show vrrp detail vlan10 vriD 100 Supermicro L2 L3 Switches Configuration Guide
25. mited period of time called a lease or until the client relinquishes the address Manual allocation the network administrator assigns an IP address to a client and DHCP is used simply to convey the assigned address to the client 1 6 1 6 Options and Sub options Configuration parameters and control information are available inthe options field of the DHCP message This can be used when additional information need not be stored in DHCP client rather it can be transmitted by the DHCP server to the client Some DHCP clients send a client identifier DHCP option 61 in the DHCP packet to the DHCP server Configuring manual bindings for such clients is done in the client identifier DHCP pool configuration To configure manual bindings for clients who do not send a client identifier option configure the hardware address DHCP pool configuration 1 6 1 7 Boot File The boot file is used to store the boot image for the client The boot image is generally the operating system the Dynamic Host Configuration Protocol DHCP client uses to load 1 6 1 8 DHCP Ping The DHCP server pings a pool address twice before assigning a particular address to a requesting client If the ping is unanswered the DHCP server assumes that the address is not in use and assigns the address to the requesting client 1 6 1 9 DHCP Server Configuration Defaults Parameter Default Value DHCP server status Disabled DHCP server IP address None Supermicro L
26. nly if the original master recovers or the new master fails 1 7 1 3 Periodic Advertisement The VRRP master sends VRRP advertisements to other VRRP routers in the same group to communicate the priority and state of the master Supermicro switches encapsulate the VRRP advertisements in IP packets and send them to the IP multicast address assigned to the VRRP group Supermicro switches send the advertisements once every second by default but you can configure a different advertisement interval 1 7 1 4 Authentication VRRP supports the following authentication functions No authentication e Plain text authentication VRRP rejects packets in any of the following cases The authentication schemes differ on the router and in the incoming packet e Text authentication strings differ on the router and in the incoming packet O VRRP is not a replacement for existing dynamic protocols Defaults Parameter Default Value VRRP Status Disabled VRID 0 Priority 100 Supermicro L2 L3 Switches Configuration Guide Authentication None Pre empt Disabled Advertisement interval 1 Follow the steps below to configure VRRP Step Command Description Step 1 configure terminal Enters the configuration mode Step 2 router vrrp Enables VRRP in the switch Step3 interface vlan lt vlan id 1 4069 gt lt interface Specifies the interface on which VRRP is type gt lt i
27. nterface id gt to be configured Step4 vrrp lt vrid 1 255 gt ipv4 lt ucast_addr gt secondary Configures the virtual IPv4 address for the specified VRRP group This address should be in the same subnet as the IPv4address of the interface Secondary Specifies VRRP routers to accept the packets sent to the virtual router s IP address Step 5 vrrp lt vrid 1 255 gt priority lt priority 1 254 gt Sets the priority level used to select the active router in a VRRP group The default is 100 for backups and 255 for a master that has an interface IP address equal to the virtual IP address Step 6 vrrp lt vrid 1 255 gt preempt Optional Enables preemption Step 7 vrrp lt vrid 1 255 gt text authentication Optional Assigns the simple text lt password gt authentication option and specifies the keyname password The keyname range is from 1 to 255 characters We recommend that you use at least 16 characters The text password is up to eight alphanumeric characters Step 8 vrrp lt vrid 1 255 gt timer lt interval 1 255 secs gt Optional Sets the VRRP advertisement interval time Step9 end Exits the configuration mode Step 10 show vrrp Displays the VRRP configuration show vrrp detail Displays the VRRP configuration with additional details like advertisement timer authentication details etc O These commands delete values or reset todefault values as applicable no router vrrp Super
28. onfiguration Examples of dynamic router discovery are Proxy ARP routing protocol s and ICMP Router Discovery Protocol IRDP client The drawback to dynamic discovery protocols is that they incur some configuration and processing overhead on the LAN client Also in the event of a router failure the process of switching to another router can be slow Supermicro L2 L3 Switches Configuration Guide Switch A SW A Switch B SW B VRI Backup VR2 Master VR1 Master VR2 Backup Client1 Client2 Client3 Client4 Gateway SW A Gateway SW B Gateway SW A Gateway SW B Figure IP 4 VRRP An alternative to dynamic discovery protocols is to statically configure a default router on the client This approach simplifies client configuration and processing but creates a single point of failure If the default gateway fails the LAN client is limited to communicating only on the local IP network segment and is cut off from the rest of the network VRRP can solve the static configuration problem VRRP enables a group of routers to form a single virtual router The LAN clients can then be configured with the virtual router as their default gateway Virtual Router Redundancy Protocol VRRP is an election protocol that dynamically assigns responsibility for one or more virtual routers to the VRRP routers on a LAN allowing several routers on a multi access link to utilize the same virtual IP address In a VRRP configuration one router i
29. p interface Gi0 22 is up line protocol is up Internet Address is 192 168 1 6 24 Broadcast address is 192 168 1 255 IP address allocation method is dynamic IP address allocation protocol is dhcp mgmt is up line protocol is down Internet address is 192 168 100 102 24 Broadcast address is 192 168 100 255 Gateway is 0 0 0 0 1 6 8 DHCP RelayAgent In small networks with only one IP subnet DHCP clients can communicate directly with DHCP servers In large networks DHCP servers provide IP addresses for multiple subnets In such cases a DHCP client that has not yet obtained an IP address from the DHCP server cannot communicate with the DHCP server using IP routing A DHCP relay agent forwards DHCP packets between clients and servers when they are not on the same physical subnet DHCP Discover DHCP Discover gt DHCP Offer E DHCP Offer m aT jj DHCP Request DHCP Request gt lt DHCPAk DHCP Ack DIE DHCP Relay Agent DHCP Client Optional Server Figure IP 4 DHCP Relay Agent The relay agent receives the broadcast from the DHCP client and unicasts it to one or more DHCP servers The relay agent stores its own IP address in the GIADDR field of the DHCP packet The DHCP server uses the GIADDR to determine the subnet on which the relay agent received the broadcast and allocates an IP address on that subnet When the DHCP server replies to the client it unicasts the reply to the GIADDR address The rel
30. ration Guide corresponding length values Options 19 20 27 29 30 31 34 36 39 46 must have a length of 1 Options 12 14 15 17 18 40 43 47 64 66 67 must have a length gt 1 Option 16 must have minimum length of 4 and the value must be an IP address Option 25 can have a length of 2 or 2 n Option 68 must have length of 4 and the value must be an IP address Options 1 11 41 42 44 45 48 49 65 69 70 76 must have a length of 4 and the value must be an IP address Options 21 33 must have a minimum length as 8 or 8 n Options 0 255 50 60 are non configurable options Step 10 lease lt days 0 365 gt lt hours 0 23 gt lt minutes Optional Specifies the duration of the 0 59 gt infinite lease The infinite keyword specifies that the duration of the lease is unlimited Step 11 utilization threshold lt integer 0 100 gt Optional Configures the utilization mark of the current address poolsize Step 12 default router lt ip address gt Optional Specifies the IP address of the default router for a DHCP client Step 13 host hardware type lt type 1 2147483647 gt Optional Specifies the hardware MAC client identifier lt mac address gt option lt code 1 2147483647 gt ascii lt string gt hex lt Hex String gt ip lt address gt address of the DHCP client 1 6 4 Supermicro L2 L3 Switches Configuration Guid
31. rticular sub section however the contents might vary across these product models In those sections the differences are clearly identified with reference to a particular model s If any particular model is not referenced the reader can safely assume that the content is applicable to all the above listed models O Throughout this document the common term switch refers to any of the above listed Supermicro switch models unless a particular model is noted 1 1IP Overview Internet Protocol IP the foundation of the IP protocol suite is a packet based protocol used for the exchange of data over computer networks IP is a network layer that contains addressing and control information to allow routing of data packets IP handles addressing fragmentation reassembly and protocol de multiplexing Supermicro switches support both TCP and UDP at the transport layer for maximum flexibility in services e Transmission Control Protocol TCP is a connection oriented protocol built upon the IP layer TCP specifies the format of data and acknowledgments used in the transfer of data and also the Supermicro L2 L3 Switches Configuration Guide procedures used to ensure that the data arrives in correct order With TCP multiple applications on a system can communicate concurrently as it handles all de multiplexing of the incoming traffic among the application programs e With UDP applications can send messages also called datagrams to oth
32. s elected as the virtual router master with the other routers acting as backups in case the virtual router master fails 1 7 1 1 Priority The VRRP priority determines the role of each VRRP router If a VRRP router owns the virtual IP address and the IP address of the physical interface this router functions as the master The priority of the Supermicro L2 L3 Switches Configuration Guide master is 255 Priority also determines the backup router in case the master fails the backup router with next highest priority is elected as the master For example if Router A the master in a LAN topology fails VRRP must determine if backups B or C should take over If Router B has priority 101 and Router C has default priority of100 VRRP selects Router B to become the master because it has the higher priority If routers B and C have default priority of 100 VRRP selects the backup with the higher IP address to become the master 1 7 1 2 Preemption VRRP uses preemption to determine what happens after a VRRP backup router becomes the master With preemption enabled by default VRRP switches to a backup if that backup comes online with ahigher priority than the new master For example if Router A is the master and fails VRRP selects Router B next in order of priority If Router C comes online with a higher priority than Router B VRRP selects Router C as the new master even though Router B has not failed If preemption is disabled VRRP switches o
33. subnet mask A valid IP subnet mask NOTE Subnet mask should be 32 bit for loopback interface Step 4 no shutdown Enable the loopback interface Step 5 end Exits the configuration mode Step 6 show ip interface Displays the Layer 3 interface configuration show interface loopback lt 1 100 gt Display the loopback interface Supermicro L2 L3 Switches Configuration Guide le O IP Routing is not supported on loopback interfaces The nointerface loopback lt interface id 1 100 gt command deletes the loopback interface SMIS configure terminal SMIS config interface loopback 1 SMIS config if ip address 100 1 1 1 32 SMIS config if no shutdown SMIS config if end SMIS show interface loopback 1 Interface Status Protocol Description loopback1upup SMISH show ip interface mgmt is up line protocol is down Internet address is 192 168 100 102 24 Broadcast address is 192 168 100 255 Gateway 0 0 0 0 loopback is up line protocol is up Internet address is 100 1 1 1 32 Broadcast address is 100 1 1 1 1 3Inter VLAN Routing VLANs enable splitting traffic across several manageable broadcast domains Devices within a VLAN can communicate with one another without requiring routing Whenever hosts in one VLAN need to communicate with hosts in another VLAN the traffic must be routed between them This is known as Inter VLAN Routing Supermicro switches use application specific int
34. t Step 4 ip address lt ip address gt lt ip address gt prefix Configures the IP address length lt subnet mask gt secondary ip address A valid IPv4 address ip address prefix length A valid IPv4 Supermicro L2 L3 Switches Configuration Guide le address with a prefix length of value 1 32 subnet mask A valid IP subnet mask 1 2 6 Secondary Assigns multiple IP addresses to network interfaces Step 5 end Exits the configuration mode Step 6 showip interface Displays the Layer 3 interface information 1 2 7 O IP Routing is enabled by default in Supermicro switches gt The switchport command deletes the Physical Layer 3 interface and the interface is reset as a Layer2 interface The example below shows the commands used to configure a Physical Layer3 Interface SMISH configure terminal SMIS config interface Gi 0 22 SMIS config if no switchport SMIS config if ip address 20 20 20 1 255 255 255 0 SMIS config if end SMIS show ip interface Gi0 22 is up line protocol is up Internet address is 20 20 20 1 24 Broadcast address is20 20 20 255 mgmt is up line protocol is down Internet address is 192 168 100 102 24 Broadcast address is192 168 100 255 Gateway 0 0 0 0 1 2 8 Layer 3 VLAN Interface VLANs typically operate at Layer 2 When aLayer2 VLAN is configured with an IP address it behaves as a logical Layer 3 VLAN interface A L3 VLAN
35. tch Figure IP 1 Inter VLAN Routing Follow the steps below to configure Inter VLAN routing 1 Create two Layer 3 interface VLANs 2 Configure an IP address for both interfaces of these Layer 3 VLANs Execute show ip route to check if the VLAN routes specified by VLAN IP address are displayed as connected routes The routing table has an entry for each VLAN interface subnet therefore devices in VLAN 10 can communicate with devices in VLAN 20 and vice versa The example below shows the commands used to configure Inter VLAN routing SMIS configure terminal Supermicro L2 L3 Switches Configuration Guide SMIS config vlan 10 SMIS config vlan ports Gi 0 21 untagged SMIS config vlan exit SMIS config interface vlan 10 SMIS config if ip address 10 10 10 1 255 255 255 0 SMIS config if H exit SMIS config vlan 20 SMIS config vlan ports Gi 0 22 untagged SMIS config vlan exit SMIS config interface vlan 20 SMIS config if ip address 20 20 20 1255 255 255 0 SMIS config if H end SMIS show ip interface mgmt is up line protocol is down Internet address is 192 168 100 102 24 Broadcast address is 192 168 100 255 Gateway 0 0 0 0 vlan10 is up line protocol is up Internet address is 10 10 10 1 24 Broadcast address is 10 10 10 255 vlan20 is up line protocol is up Internet address is 20 20 20 1 8 Broadcast address is 20 255 255 255 SMIS show ip route C 10 10 10 0 24 is directly connected vlan10 C 20
36. twork IP gt lt mask gt lt prefix Specifies the subnet network number length 1 31 gt lt start ip gt lt end ip gt and mask of the DHCP address pool Network ip A valid IPv4 address prefix length A valid IPv4 address with a prefix length value of 1 32 mask A valid IP subnet mask start ip and end ip specifies the address pool range Step 4 excluded address lt low address gt lt high address gt Optional Specifies the range of IP addresses that the DHCP server must not assign to DHCP clients in the range of low address to high address Step 5 domain name lt domain 63 gt Optional Specifies the domain name for the client Step 6 dns server lt ip address gt Optional Specifies the IP address of a DNS server that is available to a DHCP client Step 7 netbios name server lt ip address gt Optional Specifies the NetBIOS WINS server that is available to a Microsoft DHCP client Step 8 netbios node type lt 0 FF gt b node h node Optional Specifies the NetBIOS node m node p node type for a Microsoft DHCP client 1 6 2 b node Broadcast node h node Hybrid node m node Mixed node p node Peer to peer node Step9 option lt code 1 2147483647 gt ascii lt string gt Optional Configures the DHCP server hex lt Hex String gt ip lt address gt options 1 6 3 Configurable DHCP options with their Supermicro L2 L3 Switches Configu
37. ubject to change without notice Other products and companies referred to herein are trademarks or registered trademarks of their respective companies or mark holders Copyright 2013 by Super Micro Computer Inc All rights reserved Printed in the United States of America Supermicro L2 L3 Switches Configuration Guide Contents 1 IP Contiguration Guide nia dO doda di dasaka aii 4 1 1 IPOVEIVIEWisconami coopera ponia apo J mn 4 1 2 EN 5222582 1e i eee eee ee E E do zd 5 1 2 1 Physical L3 Interface s is a anin dirt iaa 5 1 2 2 Layer 3 VLAN Interface otras d a 7 1 2 3 Loopback Interface secre aie ties eee Ge a he eee 9 1 3 Ihter VLAN ROUTINE isc did 10 1 4 Statie ROUTE a 12 1 5 NN 14 1 6 DA PP A A n ii 16 1 6 1 ples an nk eje 17 1 6 2 DHCP CIEN see rak a ona id 25 1 6 3 DHCP Relay Agent he ian taj onl Woe een een aati 27 1 7 VIR IR cscs Se techs occ o a E E i a SD E o GR na 29 Supermicro L2 L3 Switches Configuration Guide 1 IP Configuration Guide This document describes the system features supported in Supermicro Layer 2 Layer 3 switch products This document covers the system configurations for the below listed Supermicro switch products Top of Rack Switches Blade Switches e SSE G24 TG4 e SBM GEM X2C e SSE G48 TG4 e SBM GEM X2C e SSE X24S e SBM GEM X3S e SSE X3348S e SBM XEM X10SM e SSE X3348T The majority of this document applies to the above listed Supermicro switch products In any pa
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