Alteon Application Switch Operating System Application Guide
High Availability
514 Document ID: RDWR-ALOS-V2900_AG1302
To add virtual routers to a service-based virtual router group
These set of commands are based on Figure 76 - Service-Based Virtual Router Groups
Configuration, page 513.
See Tracking VRRP Router Parameters, page 515
for a configuration example.
Switch-Based VRRP Groups
A switch-based virtual router group aggregates all virtual routers on Alteon as a single entity for
non-shared environments. All virtual routers will failover as a group, and cannot failover individually.
As members of a group, all virtual routers on Alteon (and therefore on Alteon itself), are either in a
master or backup state.
Characteristics of a Switch-Based VRRP Group
The following are characteristics of a switch-based VRRP group:
• When enabled, all virtual routers behave as one entity, and all group settings override any
individual virtual router settings or service-based vrgroup settings.
• All individual virtual routers, once the switch-based VRRP group is enabled, assume the group's
tracking and priority.
• When one member of a switch-based VRRP group fails, the priority of the group decreases, and
the state of the entire Alteon changes from master to backup.
• If an Alteon is in the backup state, Layer 4 processing is still enabled. If a virtual server is not a
virtual router, the backup can still process traffic addressed to that virtual server IP address.
Filtering is also still functional. Only traffic addressed to virtual server routers is not processed.
• Each VRRP advertisement can include up to 1024 addresses. All virtual routers are advertised
within the same packet, conserving processing and buffering resources.
Note: A switch-based virtual router group cannot be used for active-active configurations or any
other configuration that requires shared interfaces.
>> Main# /cfg/l3/vrrp/vrgroup 1
(Select vrgroup 1)
>> VRRP Virtual Router Vrgroup 1# add 1
(Add virtual router 1 to vrgroup 1)
>> VRRP Virtual Router Vrgroup 1# add 2
(Add virtual router 2 to vrgroup 1)
>> Main# /cfg/l3/vrrp/vrgroup 2
(Select vrgroup 2)
>> VRRP Virtual Router Vrgroup 2# add 3
(Add virtual router 3 to vrgroup 2)
>> VRRP Virtual Router Vrgroup 2# add 4
(Add virtual router 4 to vrgroup 2)
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