Nortel Networks WEB OS 212777 - Manual (Page 277)

Web OS 10.0 Application Guide
Chapter 11: High Availability n 277
212777-A, February 2002
Virtual Router Deployment Considerations
Review the following issues described in this section to prevent network problems when
deploying virtual routers:
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Mixing Active-Standby and Active-Active Virtual Routers
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Synchronizing Active/Active Failover
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Eliminating Loops with STP and VLANs
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Assigning VRRP Virtual Router ID
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Configuring the Switch for Tracking
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Synchronizing Configurations
Mixing Active-Standby and Active-Active Virtual Routers
If the network environment can support sharing, enable it for all virtual routers in the LAN. If
not, use active-standby for all virtual routers. Do not mix active-active and active-standby vir-
tual routers in a LAN. Mixed configurations have not been tested, may result in unexpected
operational characteristics, and, therefore, are not recommended.
Synchronizing Active/Active Failover
The hot-standby failover required the primary and secondary switches to have identical config-
urations and port topology. With VRRP and active/active failover, this is optional. Each switch
can be configured individually with different port topology, SLB, and filters. If you would
rather force two active/active switches to use identical settings, you can synchronize their con-
figuration using the following command:
/oper/slb/synch
The sync command copies the following settings to the switch at the specified IP interface
address:
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VRRP settings
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SLB settings (including port settings)
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Filter settings (including filter port settings)
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Proxy IP settings
If you perform the sync command, you should check the configuration on the target switch to
ensure that the settings are correct.
For more information on synchronizing configurations between two switches, see “Synchro-
nizing Configurations” on page 282 .