Extreme Networks Px Series - Manual (Page 93)

Px Series Application Switch Installation and Configuration Guide 8-3
Using VRRP with the SummitPx1
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.