Nortel Networks WEB OS 212777 User Manual
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Web OS 10.0 Application Guide
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Contents
212777-A, February 2002
Chapter 11: High Availability 247
VRRP Components 248
VRRP Operation 251
Selecting the Master VRRP Router 251
Active-Standby Failover 252
Active-Standby Redundancy 254
Active-Active Redundancy 255
Hot-Standby Redundancy 256
Synchronizing Configurations 258
Virtual Server Routers 259
Sharing/Active-Active Failover 260
Tracking VRRP Router Priority 261
High Availability Configurations 263
Active-Standby Virtual Server Router Configuration 263
Active-Active VIR and VSR Configuration 265
Active/Active Server Load Balancing Configuration 267
VRRP-Based Hot-Standby Configuration 275
Virtual Router Deployment Considerations 277
Mixing Active-Standby and Active-Active Virtual Routers 277
Synchronizing Active/Active Failover 277
Eliminating Loops with STP and VLANs 278
Assigning VRRP Virtual Router ID 280
Configuring the Switch for Tracking 280
Synchronizing Configurations 282
Stateful Failover of Layer 4 and Layer 7 Persistent Sessions 283
What Happens When a Switch Fails 284
Viewing Statistics on Persistent Port Sessions 286