Using Vrrp In Existing Redundant Networks - Extreme Networks Px Series Installation And Configuration Manual

config vrrp add vrid <number>
config vrrp vrid <number> priority 100
enable vrrp
build
To set VRRP to preempt whenever it has a higher priority than the active system, or to
prevent it from preempting, use this command:
config vrrp vrid <number> preempt|dont-preempt
You can also set the frequency of advertisement intervals, using this command:
config vrrp vrid <number> advertisement-interval <number of seconds>

Using VRRP in Existing Redundant Networks

The VRRP implementation for the Px series application switch is designed to
interoperate with any existing layer 2 and layer 3 redundancy protocols. Therefore, it
works in environments where Spanning Tree is being used for layer 2 redundancy, or
where VRRP or HSRP is being used for the layer 3 redundancy without problems.
Because the ESRP protocol in ExtremeWare is a custom layer 2 and 3 hybrid
redundancy protocol, a few extra configuration details must be configured in the
connected switches.
By default, the ESRP switch that is in standby does not forward traffic at layer 2 or
layer 3 on "host" ports that are not tagged for 802.1q. Because the active application
switch could be connected to a standby ESRP switch, you must put the port that
attaches to it in the ESRP host-attach mode. In this mode, the port will continue to
forward layer 2 traffic, ensuring that the Px series application switch can do its job. To
configure host-attach mode, use the following command:
config esrp port-mode host ports <port list>
Figure 8-1 shows an example of active and standby systems with multiple VLANs,
where ESRP is configured on the attached BlackDiamond switch.
Px Series Application Switch Installation and Configuration Guide
Using VRRP with the SummitPx1
8-3