Changing the backup priority, Saving the timer values received from the master, Changing the ttl setting – Brocade FastIron Ethernet Switch Platform and Layer 2 Switching Configuration Guide User Manual
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Syntax: [no] ip-address ip-addr
Changing the backup priority
When you enter the backup command to configure the device as a VSRP Backup for the VRID, you
also can change the backup priority and the track priority:
• The backup priority is used for election of the Master. The VSRP Backup with the highest priority
value for the VRID is elected as the Master for that VRID. The default priority is 100. If two or more
Backups are tied with the highest priority, the Backup with the highest IP address becomes the
Master for the VRID.
• The track priority is used with the track port feature. Refer to
on page 96
and
Changing the default track priority setting
To change the backup priority, enter a command such as the following at the configuration level for the
VRID.
device(config-vlan-200-vrid-1)#backup priority 75
Syntax: [no] backup [ priority value ] [ track-priority value ]
The priority value parameter specifies the backup priority for this interface and VRID. Specify a value
as follows:
• For VRRP, specify a value from 3 - 254. The default is 100.
• For VSRP and VRRP-E, specify a value from 6 - 255. The default is 100.
For a description of the track-priority value parameter, refer to
Changing the default track priority
on page 110.
Saving the timer values received from the master
The Hello messages sent by a VRID master contain the VRID values for the following VSRP timers:
• Hello interval
• Dead interval
• Backup Hello interval
• Hold-down interval
The Backups always use the value of the timers received from the Master.
To configure a Backup to save the VSRP timer values received from the Master instead of the timer
values configured on the Backup, enter the following command. Saving the current timer values
instead of the configured ones helps ensure consistent timer usage for all the VRID devices.
device(config-vlan-200-vrid-1)#save-current-values
Syntax: [no] save-current-values
Changing the TTL setting
A VSRP Hello packet time to live (TTL) specifies how many hops the packet can traverse before being
dropped. A hop can be a Layer 3 Switch or a Layer 2 Switch. You can specify from 1 - 255. The
default TTL is 2. When a VSRP device (Master or Backup) sends a VSRP HEllo packet, the device
subtracts one from the TTL. Thus, if the TTL is 2, the device that originates the Hello packet sends it
out with a TTL of 1. Each subsequent device that receives the packet also subtracts one from the
packet TTL. When the packet has a TTL of 1, the receiving device subtracts 1 and then drops the
packet because the TTL is zero.
Changing the backup priority
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FastIron Ethernet Switch Platform and Layer 2 Switching Configuration Guide
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