Avaya Configuring VRRP Services User's Manual
Contents
1. Use the Marketing Collateral Catalog description link to place an order and to print the order form 304138 A Rev 00 xi Configuring VRRP Services How to Get Help For product assistance support contracts or information about educational services go to the following URL http www baynetworks com corporate contacts Or telephone the Bay Networks Technical Solutions Center at 800 2LANWAN xii 304138 A Rev 00 Chapter 1 VRRP Concepts This chapter describes VRRP concepts you need to know before you begin configuring a VRRP router Topic Page About VRRP 11 Master Virtual Router 1 2 Backup Virtual Routers 1 2 Critical IP Interfaces 1 2 VRRP Messaging 1 2 Planning Your Network 1 3 About VRRP The Virtual Router Redundancy Protocol VRRP which runs over IP enables you to configure router redundancy to protect a network from the irrecoverable failure of one or more IP interfaces VRRP manages a virtual router which is a software defined object that corresponds to an IP address on a LAN segment A virtual router typically exists on multiple routers running VRRP known as VRRP routers One of the VRRP routers acts as the master virtual router for an IP address while other VRRP routers act as backup virtual routers You identify each virtual router using a virtual router identifier VRID and a virtual router IP address All VRRP routers on a LAN segment must have the sam2. Configuring VRRP Services BayRS Version 13 10 Site Manager Software Version 7 10 Part No 304138 A Rev 00 November 1998 Bay Networks Where Information Flows Bay Networks Where Information Flows 4401 Great America Parkway 8 Federal Street Santa Clara CA 95054 Billerica MA 01821 Copyright 1998 Bay Networks Inc All rights reserved Printed in the USA November 1998 The information in this document is subject to change without notice The statements configurations technical data and recommendations in this document are believed to be accurate and reliable but are presented without express or implied warranty Users must take full responsibility for their applications of any products specified in this document The information in this document is proprietary to Bay Networks Inc The software described in this document is furnished under a license agreement and may only be used in accordance with the terms of that license A summary of the Software License is included in this document ACE AFN AN BCN BLN BN BNX CN FRE LN Optivity PPX Quick2Config and Bay Networks are registered trademarks and Advanced Remote Node ANH ARN ASN BayRS Switch Node System 5000 and the Bay Networks logo are trademarks of Bay Networks Inc All other trademarks and registered trademarks are the property of their respective owners Restricted Rights Legend Use duplication or disclosure by the United States Governm
3. System responds 1 In the Configuration Manager window choose Protocols The Protocols menu opens Choose IP The IP menu opens 3 Choose VRRP The IP VRRP Configuration Parameters window opens 4 Click on a virtual router instance ID to The configuration that pertains to the highlight it in the list of virtual routers highlighted router appears 5 Set the Critical IP Interface parameter Click on Help or see the parameter descriptions starting on page A 5 6 Click on Apply 7 Click on Done You return to the Configuration Manager window 3 6 304138 A Rev 00 Setting the Token Ring Address Customizing VRRP If you are running VRRP on a token ring network VRRP uses the token ring functional address you provide instead of a virtual router MAC address The token ring address identifies the token ring functional address for the virtual router MAC address that is configured on an IP interface over token ring Caution For all virtual routers running over token ring you must supply token ring functional addresses for virtual router MAC addresses or VRRP will fail To set the token ring address complete the following tasks You do this Site Manager Procedure System responds 1 In the Configuration Manager window choose Protocols The Protocols menu opens 2 Choose IP The IP menu opens 3 Choose VRRP The IP VRRP Con
4. characteristics 1 3 S support Bay Networks xii Index 1 T technical publications xi technical support xii text conventions x Token Ring Address parameter A 5 token ring address setting 3 7 token ring functional address 3 7 V virtual router configuring 2 1 disabling 3 2 enabling 3 2 virtual router ID VRID assigning 2 2 Virtual Router ID parameter A 2 Virtual Router IP Address parameter A 2 A 4 virtual router IP address assigning 2 2 VRRP advertisements 3 5 Index 2 304138 A Rev 00
5. gt Select Protocols gt IP gt VRRP Default Enable Options Enable Disable Function Enables or disables a virtual router on an interface Instructions Select Enable to Enable a virtual router on an interface Select Disable to disable a virtual router on an interface MIB Object ID 1 3 6 1 4 1 18 3 5 3 25 1 1 2 304138 A Rev 00 A 3 Configuring VRRP Services Parameter Path Default Options Function Instructions MIB Object ID Parameter Path Default Options Function Instructions MIB Object ID Parameter Path Default Options Function Instructions MIB Object ID Virtual RouterIP Address Configuration Manager gt Select Protocols gt IP gt VRRP None Any valid IP address in dotted decimal notation Identifies the IP address of the interface that the virtual router backs up Enter the IP address that you want the virtual router to back up Ensure that the primary IP address and the virtual router IP address are on the same subnet If the virtual router IP address is the same as the primary IP address you should set the priority to 255 and then this VRRP router when operating will always be the master virtual router 1 3 6 1 4 1 18 3 5 3 25 1 1 6 Priority Configuration Manager gt Select Protocols gt IP gt VRRP 100 1 to 255 Specifies the priority of the virtual router with respect to all virtual routers on the IP interface Enter a priority from 1 to 254 T
6. 1 1 1 1 Router B Wirtualrouter1 Virtualrouter Op IVRIP 132 128 128 30 VRIP 132 128 128 30 VRID s1 VRID 1 7 Priority 50 Priority 255 bt 132 128 128 10 132 128 128 30 VRIP 132 128 128 30 CRIP 1 1 1 1 Continuous ping 200 200 200 2 DG 132 128 128 128 30 Key DG Default gateway CRIP Critical IP interface address VRIP Virtual router IP address VRID Virtual router ID VR0003A Figure 1 3 Using VRRP with a Critical IP Interface 304138 A Rev 00 1 5 Configuring VRRP Services Figure 1 4 shows an invalid VRRP configuration that is the virtual router with primary IP address 1 1 1 1 is not configured on a VRRP router that has a physical interface with IP address 1 1 1 1 You must always configure a virtual router whose IP address physically exists on the LAN For example you must configure virtual router 1 on router A because the IP address of virtual router 1 is the same as the physical address of router A Router A Router B Router C IG sw ee eee ms xa ee Le SS SS Se ol M Virtual router 1 Virtual Router 1 VRIP 1 1 1 1 VRIP 1 1 1 1 i VRID 1 VRID 1 j N Priority 100 Priority 50 7 1 1 1 1 1 1 1 2 1 1 1 3 1 1 1 4 DG 1 1 1 1 Host Key DG Default gateway VRIP Virtual router IP address VRID Virtual router ID VR0004A Figure 1 4 Sample Invalid Virtual Router Configuration 1 6 304138 A Rev 00 Chapter 2 Starting VRRP Services Using Site Manager You
7. advertisements sent by the virtual router Ensure that the primary IP address and the virtual router IP address are on the same subnet 1 3 6 1 4 1 18 3 5 3 25 1 1 4 Virtual Router ID Configuration Manager gt Select Protocols gt IP gt VRRP gt Add None 1 to 255 Identifies the virtual router s ID VRID The router uses this number to calculate the MAC address The VRID must be unique on the LAN segment Enter the ID of the virtual router 1 3 6 1 4 1 18 3 5 3 25 1 1 5 Virtual Router IP Address Configuration Manager gt Select Protocols gt IP gt VRRP gt Add None Any valid IP address in dotted decimal notation Identifies the IP address that the virtual router backs up Ensure that the primary IP address and the virtual router IP address are on the same subnet If the virtual router IP address is the same as the primary IP address then this VRRP router when operating will always be the master virtual router 1 3 6 1 4 1 18 3 5 3 25 1 1 6 A 2 304138 A Rev 00 Site Manager Parameters VRRP Configuration Parameters The VRRP configuration parameters enable you to customize a virtual router You access these parameters from the IP VRRP Configuration Parameters window Figure A 2 md Enubla Virtual Bowker IP Address Priority Biri lewmani vera Critical IP Interac LPE Backup Figure A 2 IP VRRP Configuration Parameters Window Parameter Enable Path Configuration Manager
8. install a default route to VRRP router A s IP address 1 1 1 1 and the other half install a default route to VRRP router B s IP address 2 2 2 2 Using two different default routes has the effect of load balancing the outgoing traffic while also providing full redundancy Router A Router B running VRRP running VRRP Pa Se Se eel Ca J ed 1 N Virtual router 1 Master virtual J router for 1 1 1 1 Virtual router 1 7 Na Backup virtual 1 router for 1 1 1 1 pe Virtual router 2 Backup virtual Master rirtual router for 2 2 2 2 router for 2 2 2 2 do a ee sey ae SAE are ge ay eee LL Virtual Router 2 7 IP address IP address tida 2 2 2 2 DG 1 1 1 1 DG 1 1 1 1 DG 2 2 2 2 DG 2 2 2 2 Host Host Host Host 1 2 3 4 Key DG Default gateway VR0002A Figure 1 2 Using VRRP and Perfoming Load Balancing 1 4 304138 A Rev 00 VRRP Concepts The configuration in Figure 1 3 shows that IP address 1 1 1 1 provides connectivity to external networks If that connection fails and the virtual router 1 on router B continues to forward traffic you still lose connectivity to external networks However if you designate IP address 1 1 1 1 as the critical IP address for virtual router 1 on router B and IP address 1 1 1 1 fails then virtual router 1 on router A becomes the master virtual router and begins forwarding traffic 200 200 200 2 Router C 2 2 2 2 1 1 1 2 Router A 2 2 2
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10. must configure IP services on a router before you can configure VRRP See Configuring IP Services for information about how to configure IP You can create a basic virtual router configuration by supplying only the required configuration information and accepting the default values for all other Site Manager parameters Configuring a Virtual Router When configuring a virtual router you must supply the following e Primary IP address The primary IP address associates a virtual router with the IP address of the physical interface You cannot change the primary IP address after you configure a virtual router If this primary IP address matches the virtual router IP address and the virtual router has the highest priority of 255 then this VRRP router becomes the master virtual router if it is available Caution You should not configure an Ethernet interface as the master virtual router on an ANH router 304138 A Rev 00 24 Configuring VRRP Services e Virtual router ID The virtual router ID VRID identifies the virtual router VRRP uses the virtual router ID to calculate the virtual router s virtual MAC address If the virtual router is in the primary virtual router state it responds to all ARP requests using the IP address of the virtual router with its virtual MAC address not its physical MAC address You cannot change the virtual router ID after you configure a virtual router e Virtual router IP address The v
11. without specific prior written permission SUCH PORTIONS OF THE SOFTWARE ARE PROVIDED AS IS AND WITHOUT ANY EXPRESS OR IMPLIED WARRANTIES INCLUDING WITHOUT LIMITATION THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE In addition the program and information contained herein are licensed only pursuant to a license agreement that contains restrictions on use and disclosure that may incorporate by reference certain limitations and notices imposed by third parties Bay Networks Inc Software License Agreement NOTICE Please carefully read this license agreement before copying or using the accompanying software or installing the hardware unit with pre enabled software each of which is referred to as Software in this Agreement BY COPYING OR USING THE SOFTWARE YOU ACCEPT ALL OF THE TERMS AND CONDITIONS OF THIS LICENSE AGREEMENT THE TERMS EXPRESSED IN THIS AGREEMENT ARE THE ONLY TERMS UNDER WHICH BAY NETWORKS WILL PERMIT YOU TO USE THE SOFTWARE If you do not accept these 304138 A Rev 00 terms and conditions return the product unused and in the original shipping container within 30 days of purchase to obtain a credit for the full purchase price 1 License Grant Bay Networks Inc Bay Networks grants the end user of the Software Licensee a personal nonexclusive nontransferable license a to use the Software either on a single computer or if applicable on a single authoriz
12. Quick Starting Routers Configuring BayStack Remote Access or Connecting ASN Routers to a Network Make sure that you are running the latest version of Bay Networks BayRS and Site Manager software For information about upgrading BayRS and Site Manager see the upgrading guide for your version of BayRS 304138 A Rev 00 ix Configuring VRRP Services Text Conventions This guide uses the following text conventions bold text brackets italic text separator 5 vertical line Indicates text that you need to enter and command names and options Example Enter show ip alerts routes Example Use the dinfo command Indicate optional elements in syntax descriptions Do not type the brackets when entering the command Example If the command syntax is show ip interfaces alerts you can enter either show ip interfaces or show ip interfaces alerts Indicates file and directory names new terms book titles and variables in command syntax descriptions Where a variable is two or more words the words are connected by an underscore Example If the command syntax is show at lt valid_route gt valid_route is one variable and you substitute one value for it Shows menu paths Example Protocols gt IP identifies the IP option on the Protocols menu Separates choices for command keywords and arguments Enter only one of the choices Do not type the vertical line when entering the command E
13. S IT AND AGREES TO BE BOUND BY ITS TERMS AND CONDITIONS LICENSEE FURTHER AGREES THAT THIS AGREEMENT IS THE ENTIRE AND EXCLUSIVE AGREEMENT BETWEEN BAY NETWORKS AND LICENSEE WHICH SUPERSEDES ALL PRIOR ORAL AND WRITTEN AGREEMENTS AND COMMUNICATIONS BETWEEN THE PARTIES PERTAINING TO THE SUBJECT MATTER OF THIS AGREEMENT NO DIFFERENT OR ADDITIONAL TERMS WILL BE ENFORCEABLE AGAINST BAY NETWORKS UNLESS BAY NETWORKS GIVES ITS EXPRESS WRITTEN CONSENT INCLUDING AN EXPRESS WAIVER OF THE TERMS OF THIS AGREEMENT iv 304138 A Rev 00 Contents Preface ba fs leas a Peete ee eres teen ent ere Ret ere cere deter AE mer nace er erty ix TED DN ett ca AGAIN AA AA AGAD x PTO pama NA NEPAL NBA ce pee AA aMaaSeTTIN xi Bay Networks Technical PUGAY NB cccccsccccusssccodssibaensscksceecuscsececuussceocuss anandan xi Fow to Get HEIN aaa KK be cece ce ceeds Deed Seca ie eet eden eg ee eda cee xii Chapter 1 VRRP Concepts ADDU UAAP AANGAT GA AGNO AA 1 1 paga CIN ROUTINE BAN AR ANAN AA 1 2 Bacup virtual MS sis Seas ced asics a wus ce asda a a ka AG 1 2 CEIRGGN al AA AA AA 1 2 LG a bal AA E 1 2 a AA 1 3 Sample GONIGUKANANG aaa AGA 1 3 Chapter 2 Starting VRRP Services Using Site Manager COMTI TG KALUPAAN 2 1 Chapter 3 Customizing VRRP Disabling and Reenabling a Virtual Router sser PE E R 3 2 Changing the IP Address Backed Up by a Virtual Router 0 ceeccceeeeeeeeeeeeeteeeeeneeees 3 3 Setting the Priority of the Virtual OUI susisruntsiiniasan aaa as
14. ace Address 3 6 3 7 Setting the Token Ring Address Caution If you are configuring virtual routers on the IP interface used as the Site Manager management console you should not add or modify a backup virtual router before you create a master virtual router Otherwise you can lose connectivity to the router when dynamically configuring virtual routers Use local or remote mode when configuring a virtual router 304138 A Rev 00 3 1 Configuring VRRP Services Disabling and Reenabling a Virtual Router When you first configure a virtual router by default Site Manager enables that virtual router To disable or reenable a virtual router complete the following tasks Site Manager Procedure You do this System responds 1 In the Configuration Manager window choose Protocols The Protocols menu opens Choose IP The IP menu opens 3 Choose VRRP The IP VRRP Configuration Parameters window opens or see the parameter description on page A 3 4 Click on a virtual router instance ID to The configuration that pertains to the highlight it in the list of virtual routers highlighted virtual router appears 5 Set the Enable parameter Click on Help 6 Click on Apply 7 Click on Done You return to the Configuration Manager window 304138 A Rev 00 Customizing VRRP Changing the IP Address Backed Up by a Virtual Router When you first config
15. ana ans 3 4 Setting the Advertisement Interval umaamin 3 5 Setting the Critical IP Interface Address sisoiiniiniicniiiinianaina nia 3 6 Seting the Token Ring Aes cece csturdaces oatagienedaneeah anpaaetetaesassesoncianet metakaarimnepeees 3 7 304138 A Rev 00 V Appendix A Site Manager Parameters Add Virtual Router Pakambtarg ua aa a naaa A 1 VRRP Configuration Parameters Lutes eee reece PAT T aa paunan a A 3 Glossary Index vi 304138 A Rev 00 Figures Figure 1 1 Using VRRP with One Master and One Backup Virtual Router 1 3 Figure 1 2 Using VRRP and Perfoming Load Balancing ccscceseeeeeeeeeteees 1 4 Figure 1 3 Using VRRP with a Critical IP InternaACe manmanan 1 5 Figure 1 4 Sample Invalid Virtual Router Configuration ccccccsseeeeeseeeeeteeeeneeeee 1 6 Figure A 1 Add Virtual Router Window GAGANA aNG eee Shenae rete ere re A 1 Figure A 2 IP VRRP Configuration Parameters Window ceceeeseeeseeesteeeneeeees A 3 304138 A Rev 00 vii Preface This guide describes the Virtual Router Redundancy Protocol VRRP and what you do to start and customize VRRP services on a Bay Networks router Before You Begin Before using this guide you must complete the following procedures For a new router e Install the router see the installation guide that came with your router e Connect the router to the network and create a pilot configuration file see
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17. e VRID and IP address You can however use a VRID on more than one LAN as long as you pair it with a different virtual router IP address The scope of each virtual router is restricted to a single LAN 304138 A Rev 00 1 1 Configuring VRRP Services Master Virtual Router The master virtual router is the VRRP router responsible for forwarding the traffic received at the MAC address associated with the virtual router IP address A VRRP router with the highest priority assumes the responsibilities of the master virtual router When the master virtual router fails one of the backup virtual routers becomes the master virtual router Backup Virtual Routers If the master virtual router becomes unavailable or if it is not functioning normally VRRP dynamically switches over to one of the backup virtual routers in the order of the priority you set If more than one backup virtual router has the same priority assigned to it the VRRP router with the greater primary IP address will become the new master virtual router Critical IP Interfaces You can establish a critical IP address which is a physical IP interface on a local router for each virtual router If that critical IP interface fails then VRRP switches to another virtual router Figure 1 3 on page 1 5 shows a sample VRRP configuration using a critical IP interface VRRP Messaging VRRP generates VRRP advertisement messages as IP multicast datagrams enabling VRRP to operate ov
18. ed device identified by host ID for which it was originally acquired b to copy the Software solely for backup purposes in support of authorized use of the Software and c to use and copy the associated user manual solely in support of authorized use of the Software by Licensee This license applies to the Software only and does not extend to Bay Networks Agent software or other Bay Networks software products Bay Networks Agent software or other Bay Networks software products are licensed for use under the terms of the applicable Bay Networks Inc Software License Agreement that accompanies such software and upon payment by the end user of the applicable license fees for such software 2 Restrictions on use reservation of rights The Software and user manuals are protected under copyright laws Bay Networks and or its licensors retain all title and ownership in both the Software and user manuals including any revisions made by Bay Networks or its licensors The copyright notice must be reproduced and included with any copy of any portion of the Software or user manuals Licensee may not modify translate decompile disassemble use for any competitive analysis reverse engineer distribute or create derivative works from the Software or user manuals or any copy in whole or in part Except as expressly provided in this Agreement Licensee may not copy or transfer the Software or user manuals in whole or in part The Software and user manuals embody B
19. ent is subject to restrictions as set forth in subparagraph c 1 ii of the Rights in Technical Data and Computer Software clause at DFARS 252 227 7013 Notwithstanding any other license agreement that may pertain to or accompany the delivery of this computer software the rights of the United States Government regarding its use reproduction and disclosure are as set forth in the Commercial Computer Software Restricted Rights clause at FAR 52 227 19 Statement of Conditions In the interest of improving internal design operational function and or reliability Bay Networks Inc reserves the right to make changes to the products described in this document without notice Bay Networks Inc does not assume any liability that may occur due to the use or application of the product s or circuit layout s described herein Portions of the code in this software product may be Copyright 1988 Regents of the University of California All rights reserved Redistribution and use in source and binary forms of such portions are permitted provided that the above copyright notice and this paragraph are duplicated in all such forms and that any documentation advertising materials and other materials related to such distribution and use acknowledge that such portions of the software were developed by the University of California Berkeley The name of the University may not be used to endorse or promote products derived from such portions of the software
20. er a variety of multiaccess LAN technologies that support IP multicasting 1 2 304138 A Rev 00 VRRP Concepts Planning Your Network You can use VRRP to target stub networks with hosts having default gateway addresses to provide redundancy for IP addresses To avoid a single point of failure you should configure the default gateway IP address as the virtual router IP address on multiple IP interfaces on different physical routers Refer to the following sample configurations when determining how to configure VRRP in your network Sample Configurations The configuration in Figure 1 1 shows a simple VRRP scenario in which both router A and router B are running VRRP The end hosts install a default route to the IP address of router A which serves as the master virtual router for virtual router 1 If router A fails then router B becomes the master virtual router for virtual router 1 Router A Router B running VRRP running VRRP aoe ee eee oS a Virtual router 1 Backup virtual router for 1 1 1 1 Virtual router 1 Master virtual router for 1 1 1 1 Pa he a ee AA aaa an IP Address IP Address a Pe pa Ba 2 2 2 2 DG 1 1 1 1 DG 1 1 1 1 DG 1 1 1 1 DG 1 1 1 1 Host Host Host Host 1 2 3 4 Key DG Default gateway VROOOLA Figure 1 1 Using VRRP with One Master and One Backup Virtual Router 304138 A Rev 00 1 3 Configuring VRRP Services The configuration in Figure 1 2 shows that half of the hosts
21. figuration Parameters window opens 4 Click on a virtual router instance ID to highlight it in the list of virtual routers Click on Help or see the parameter descriptions starting on page A 5 5 Set the Token Ring Address parameter The configuration that pertains to the highlighted router appears 6 Click on Apply 7 Click on Done You return to the Configuration Manager window 304138 A Rev 00 3 7 Appendix A Site Manager Parameters This appendix explains all VRRP parameters and how to use them to customize a virtual router that you have added to an IP interface Add Virtual Router Parameters The VRRP parameters displayed in the Add Virtual Router window Figure A 1 enable you to establish a virtual router on an IP interface Primary IP direos Virlunal Aouier TO Virtusl Reiter IP Address Figure A 1 Add Virtual Router Window 304138 A Rev 00 A 1 Configuring VRRP Services Parameter Path Default Options Function Instructions MIB Object ID Parameter Path Default Options Function Instructions MIB Object ID Parameter Path Default Options Function Instructions MIB Object ID Primary IP Address Configuration Manager gt Select Protocols gt IP gt VRRP gt Add None Any valid IP address in dotted decimal notation Identifies the IP address of the physical interface The router lists this IP address as the source in VRRP
22. from the master virtual router to notify all backup routers that it is currently the master virtual router and is forwarding all traffic You must set the same advertisement interval for all VRRP routers having the same VRID on the same LAN To set the advertisement interval complete the following tasks Site Manager Procedure You do this System responds 1 In the Configuration Manager window choose Protocols The Protocols menu opens 2 Choose IP The IP menu opens 3 Choose VRRP 4 Click on a virtual router instance ID to highlight it in the list of virtual routers The IP VRRP Configuration Parameters window opens The configuration that pertains to the highlighted router appears 5 Set the Advertisement Interval parameter Click on Help or see the parameter descriptions starting on page A 4 6 Click on Apply 7 Click on Done You return to the Configuration Manager window 304138 A Rev 00 3 5 Configuring VRRP Services Setting the Critical IP Interface Address The critical IP interface resides on the same router as a physical interface The state of the critical IP interface determines the state of the virtual router If the critical interface fails the virtual router fails and the VRRP router with the next highest priority becomes the master virtual router and begins routing traffic to its destination Site Manager Procedure You do this
23. he higher the value you specify the higher the priority of the virtual router Site Manager automatically supplies a priority of 100 for all backup virtual routers If you set the primary IP address to the IP address of the physical interface Site Manager sets the priority to 255 1 3 6 1 4 1 18 3 5 3 25 1 1 8 Advertisement Interval Configuration Manager gt Select Protocols gt IP gt VRRP 1 1 to 255 seconds The interval in seconds between the transmission of VRRP advertisements from the primary virtual router Enter a value from 1 to 255 seconds 1 3 6 1 4 1 18 3 5 53 25 1 1 9 A 4 304138 A Rev 00 Parameter Path Default Options Function Instructions MIB Object ID Parameter Path Default Options Function Instructions MIB Object ID Site Manager Parameters Critical IP Interface Configuration Manager gt Select Protocols gt IP gt VRRP 0 0 0 0 none Any valid IP address in dotted decimal notation Identifies an IP address that determines whether the virtual router assumes the role of the master virtual router and is responsible for forwarding traffic If the critical IP address is operating then the virtual router forwards traffic If the critical IP address is down then a backup virtual router assumes the responsibilities of the master virtual router and forwards traffic The critical IP address must be on the same router as the primary IP address Specify an IP addres
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25. irtual router IP address identifies the IP address that the virtual router backs up To configure a virtual router complete the following tasks Caution If you are configuring virtual routers on the IP interface used as the Site Manager management console you should not add or modify a backup virtual router before you create a master virtual router Otherwise you can lose connectivity to the router when dynamically configuring virtual routers Use local or remote mode when configuring a virtual router Site Manager Procedure You do this System responds 1 In the Configuration Manager window The Protocols menu opens choose Protocols 2 Choose IP The IP menu opens 3 Choose VRRP The IP VRRP Configuration Parameters window opens 4 Click on Add The Add Virtual Router window opens 5 Set the following parameters Primary IP Address Virtual Router ID e Virtual Router IP Address Click on Help or see the parameter descriptions starting on page A 2 6 Click on OK You return to the Configuration Manager window 304138 A Rev 00 Chapter 3 Customizing VRRP To customize VRRP use the information in the following sections Topic Page Disabling and Reenabling a Virtual Router 3 2 Changing the IP Address Backed Up by a Virtual Router 3 3 Setting the Priority of the Virtual Router 3 4 Setting the Advertisement Interval 3 5 Setting the Critical IP Interf
26. l router A software defined object managed by VRRP that corresponds to an IP address on a LAN segment A virtual router typically exists on multiple VRRP routers one of which acts as the master virtual router for this IP address while the others act as backup virtual routers VRID The virtual router identifier configured in the range of 1 to 255 The VRID must be unique within the subnet VRRP router A router running the Virtual Router Redundancy Protocol A VRRP router may participate in one or more virtual routers Glossary 2 304138 A Rev 00 A acronyms Xi adding a virtual router 3 3 Advertisement Interval parameter A 4 advertisement interval setting 3 5 backup virtual router defined 1 2 C configuring a virtual router 2 1 conventions text x Critical IP Interface parameter A 5 critical IP interface specifying 3 6 D disabling a virtual router 3 2 E educational services xii Enable parameter A 3 enabling a virtual router 3 2 IP address to be backed up assigning 3 3 IP multicast datagrams 1 2 304138 A Rev 00 Index MAC address 1 2 2 2 master virtual router defined 1 2 messaging 1 2 P primary IP address 2 1 Primary IP Address parameter A 2 priority of virtual routers defined 1 2 Priority parameter A 4 priority setting 3 4 product support xii protocol messaging defined 1 2 publications Bay Networks xi R redundancy services planning 1 3 router redundancy
27. mple if you designate IP address 1 1 1 1 as the critical IP address for virtual router 1 on router B and IP address 1 1 1 1 fails then virtual router 1 on router B is no longer the master virtual router and a backup virtual router becomes the master virtual router The VRRP router that assumes responsibility for forwarding data packets received at the MAC address associated with its virtual router and answers ARP requests for its IP address A router may be the master virtual router and or the backup virtual router for many virtual routers The real IP interface address used as the source IP address for the IP packets carrying advertisements The value that determines whether a virtual router serves as the master or backup virtual router The VRRP router with the highest priority becomes the master virtual router The value of 255 is reserved for the router that owns the IP address associated with the virtual router The value of 0 is reserved for the master virtual router to indicate that it is releasing responsibility for the virtual router The range of 1 to 254 is available for VRRP routers backing up the virtual router The default priority is 100 A unicast MAC address associated with each virtual router and used as the source MAC address for VRRP advertisements The master virtual router uses this address instead of its physical MAC address in all communication 304138 A Rev 00 Glossary 1 Configuring VRRP Services virtua
28. oftware clause of DFARS 252 227 7013 for agencies of the Department of Defense or their successors whichever is applicable 6 Use of Software in the European Community This provision applies to all Software acquired for use within the European Community If Licensee uses the Software within a country in the European Community the Software Directive enacted by the Council of European Communities Directive dated 14 May 1991 will apply to the examination of the Software to facilitate interoperability Licensee agrees to notify Bay Networks of any such intended examination of the Software and may procure support and assistance from Bay Networks 7 Term and termination This license is effective until terminated however all of the restrictions with respect to Bay Networks copyright in the Software and user manuals will cease being effective at the date of expiration of the Bay Networks copyright those restrictions relating to use and disclosure of Bay Networks confidential information shall continue in effect Licensee may terminate this license at any time The license will automatically terminate if Licensee fails to comply with any of the terms and conditions of the license Upon termination for any reason Licensee will immediately destroy or return to Bay Networks the Software user manuals and all copies Bay Networks is not liable to Licensee for damages in any form solely by reason of the termination of this license 8 Export and Re e
29. omes the master virtual router as soon as it comes up If you initially configure a backup virtual router and later change the primary IP address to the virtual router IP address you must manually change the priority to 255 for the virtual router to become the master virtual router By default Site Manager assigns a priority of 100 to all backup virtual routers You can set the priority for backup virtual routers from 1 to 254 If you assign more than one backup virtual router the same priority the VRRP router with the greater primary IP address takes precedence To set a virtual router s priority complete the following tasks Site Manager Procedure You do this System responds 1 In the Configuration Manager window The Protocols menu opens choose Protocols 2 Choose IP The IP menu opens 3 Choose VRRP The IP VRRP Configuration Parameters window opens 4 Click on a virtual router instance ID to The configuration that pertains to the highlight it in the list of virtual routers highlighted virtual router appears 5 Set the Priority parameter Click on Help or see the parameter descriptions starting on page A 4 6 Click on Apply 7 Click on Done You return to the Configuration Manager window 304138 A Rev 00 Setting the Advertisement Interval Customizing VRRP The advertisement interval determines the interval in seconds between transmissions of VRRP advertisements
30. s on the same router where the primary IP address resides 1 3 6 1 4 1 18 3 5 53 25 1 1 10 Token Ring Address Configuration Manager gt Select Protocols gt IP gt VRRP None Use one of the following unused token ring functional addresses 03 00 02 00 00 00 03 00 04 00 00 00 03 00 08 00 00 00 03 00 10 00 00 00 03 00 20 00 00 00 03 00 40 00 00 00 03 00 80 00 00 00 03 00 00 01 00 00 03 00 00 02 00 00 03 00 00 04 00 00 03 00 00 08 00 00 Identifies the token ring functional address for the virtual router ID MAC address that is configured on an IP interface over token ring Specify a unique functional token ring address You must specify a token ring functional address for virtual routers on an IP interface over token ring or VRRP will not function 1 3 6 1 4 1 18 3 5 53 25 1 1 13 304138 A Rev 00 A 5 advertisement backup virtual router critical IP interface master virtual router primary IP address priority virtual MAC address Glossary An IP packet periodically broadcast by the master virtual router to prevent any of the backup virtual routers from becoming the master virtual router One of a set of VRRP routers available to become the master virtual router A router may be the master virtual router and or the backup virtual router for many virtual routers A local IP interface associated with a virtual router When the state of this interface changes the virtual router switches roles For exa
31. ure a virtual router you must supply an IP address that the virtual router backs up This IP address must be on the same subnet as the primary IP address To change the IP address to be backed up by a virtual router complete the following tasks Site Manager Procedure You do this System responds 1 In the Configuration Manager window choose Protocols The Protocols menu opens 2 Choose IP The IP menu opens 3 Choose VRRP The IP VRRP Configuration Parameters window opens 4 Click on a virtual router instance ID to highlight it in the list of virtual routers The configuration that pertains to the highlighted virtual router appears 5 Set the Virtual Router IP Address parameter Click on Help or see the parameter descriptions starting on page A 4 6 Click on Apply 7 Click on Done You return to the Configuration Manager window 304138 A Rev 00 Configuring VRRP Services Setting the Priority of the Virtual Router You can set the priority of the virtual router in relation to all virtual routers that have the same virtual router ID and are on the same subnet The higher you set the value the higher the priority of the virtual router When you initially configure a virtual router if the primary IP address is the same as the virtual router IP address Site Manager automatically sets the priority to the highest priority 255 and the virtual router bec
32. xample If the command syntax is show ip alerts routes you enter either show ip alerts or show ip routes but not both 304138 A Rev 00 Preface Acronyms IP Internet Protocol LAN local area network MAC media access control MIB management information base VRID virtual router ID VRRP Virtual Router Redundancy Protocol Bay Networks Technical Publications You can now print Bay Networks technical manuals and release notes free directly from the Internet Go to support baynetworks com library tpubs Find the Bay Networks product for which you need documentation Then locate the specific category and model or version for your hardware or software product Using Adobe Acrobat Reader you can open the manuals and release notes search for the sections you need and print them on most standard printers You can download Acrobat Reader free from the Adobe Systems Web site www adobe com You can purchase Bay Networks documentation sets CDs and selected technical publications through the Bay Networks Collateral Catalog The catalog is located on the World Wide Web at support baynetworks com catalog html and is divided into sections arranged alphabetically e The CD ROMs section lists available CDs e The Guides Books section lists books on technical topics e The Technical Manuals section lists available printed documentation sets Make a note of the part numbers and prices of the items that you want to order
33. xport Licensee agrees not to export directly or indirectly the Software or related technical data or information without first obtaining any required export licenses or other governmental approvals Without limiting the foregoing Licensee on behalf of itself and its subsidiaries and affiliates agrees that it will not without first obtaining all export licenses and approvals required by the U S Government i export re export transfer or divert any such Software or technical data or any direct product thereof to any country to which such exports or re exports are restricted or embargoed under United States export control laws and regulations or to any national or resident of such restricted or embargoed countries or ii provide the Software or related technical data or information to any military end user or for any military end use including the design development or production of any chemical nuclear or biological weapons 9 General If any provision of this Agreement is held to be invalid or unenforceable by a court of competent jurisdiction the remainder of the provisions of this Agreement shall remain in full force and effect This Agreement will be governed by the laws of the state of California Should you have any questions concerning this Agreement contact Bay Networks Inc 4401 Great America Parkway PO Box 58185 Santa Clara California 95054 8185 LICENSEE ACKNOWLEDGES THAT LICENSEE HAS READ THIS AGREEMENT UNDERSTAND
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