Configuring Or Enabling Priority Preemption - Cisco MDS 9000 series Configuration Manual

Virtual Router Redundancy Protocol
S e n d d o c u m e n t a t i o n c o m m e n t s t o m d s f e e d b a c k - d o c @ c i s c o . c o m
Command
Step 3
switch(config-if)# vrrp 50
switch(config-if-vrrp)#
Step 4
switch(config-if-vrrp)# advertisement-interval 15
switch(config-if-vrrp)# no advertisement-interval
To set the time interval for advertisement packets for a virtual router using IPv6, follow these steps:
Command
Step 1
switch# config t
Step 2
switch(config)# interface vsan 12
switch(config-if)#
Step 3
switch(config-if)# vrrp ipv6 200
switch(config-if-vrrp-ipv6)#
Step 4
switch(config-if-vrrp-ipv6)#
advertisement-interval 150
switch(config-if-vrrp-ipv6)# no
advertisement-interval

Configuring or Enabling Priority Preemption

You can enable a higher-priority backup virtual router to preempt the lower-priority master virtual router.
Note If the virtual IP address is also the IP address for the interface, then preemption is implicitly applied.
Note The VRRP preemption is not supported on IP storage Gigabit Ethernet interfaces.
To enable or disable preempting when using IPv4, follow these steps:
Command
Step 1
switch# config t
Step 2
switch(config)# interface vsan 10
switch(config-if)#
Step 3
switch(config-if)# vrrp 250
switch(config-if-vrrp)#
Step 4
switch(config-if-vrrp)# preempt
switch(config-if-vrrp)# no preempt
Cisco MDS 9000 Family NX-OS IP Services Configuration Guide
5-22
Purpose
Creates a virtual router.
Sets the interval time in seconds between
sending advertisement frames. The range
is 1 to 255.
Reverts to the default value (1 second).
Purpose
Enters configuration mode.
Configures a VSAN interface (VSAN 12).
Creates a virtual router.
Sets the interval time in centiseconds between
sending advertisement frames. The range is 100 to
4095. The default is 100 centiseconds.
Reverts to the default value (100 centiseconds).
Purpose
Enters configuration mode.
Configures a VSAN interface (VSAN 10).
Creates a virtual router.
Enables the higher priority backup virtual router to preempt
the lower priority master virtual router.
This preemption does not apply to the primary IP
Note
address.
Disables (default) the preempt option and allows the master
to keep its priority level.
OL-19525-01,Cisco MDS NX-OS Release 4.2(1)
Chapter 5 Configuring IP Services