Brocade Multi-Service IronWare Switching Configuration Guide (Supporting R05.6.00) - Manual (Page 602)

572 Multi-Service IronWare Switching Configuration Guide
53-1003036-02
Displaying VSRP information
16
Preemption applies only to Backups and takes effect only when the Master has failed and a
Backup has assumed ownership of the VRID. The feature prevents a Backup with a higher priority
from taking over as Master from another Backup that has a lower priority but has already become
the Master of the VRID.
Preemption is especially useful for preventing flapping in situations where there are multiple
Backups and a Backup with a lower priority than another Backup has assumed ownership, because
the Backup with the higher priority was unavailable when ownership changed.
If you enable the non-preempt mode (thus disabling the preemption feature) on all the Backups,
the Backup that becomes the Master following the disappearance of the Master continues to be
the Master. The new Master is not preempted.
To disable preemption on a Backup, enter a command such as the following at the configuration
level for the VRID.
Brocade(config-vlan-200-vrid-1)# non-preempt-mode
Syntax: [no] non-preempt-mode
Displaying VSRP information
You can display the following VSRP information:
• Configuration information and current parameter values for a VRID or VLAN
• The interfaces on a VSRP-aware device that are active for the VRID
Displaying VRID information
To display VSRP information, enter the following command.
Brocade# show vsrp vrid 10
VLAN 100
Auth-type no authentication
VRID 100
========
State Administrative-status Advertise-backup Preempt-mode
Master Enabled Disabled True
Parameter Configured Current Unit/Formula
Priority 100 100 (100-0)*(3.0/3.0)
Hello-interval 1 1 sec/1
Dead-interval 3 3 sec/1
Hold-interval 3 3 sec/1
Initial-ttl 2 2 hops
Next hello sent in 00:00:00
Member ports: ethe 1/1 ethe 2/1 ethe 2/10
Operational ports: ethe 1/1 ethe 2/1 ethe 2/10