Brocade FastIron Ethernet Switch Platform and Layer 2 Switching Configuration Guide - Manual (Page 102)

VSRP parameters (Continued) TABLE 21
Parameter Description Default For more
information
VRID IP address A gateway address you are backing up.
Configuring an IP address provides VRRP-E
Layer 3 redundancy in addition to VSRP LAyer 2
redundancy.
The VRID IP address must be in the same subnet
as a real IP address configured on the VSRP
interface, but cannot be the same as a real IP
address configured on the interface.
NOTE
This parameter is valid only on Layer 3 Switches.
None Configuring a VRID
IP address
on page
107
Backup priority A numeric value that determines a Backup
preferability for becoming the Master for the VRID.
During negotiation, the device with the highest
priority becomes the Master.
In VSRP, all devices are Backups and have the
same priority by default.
If two or more Backups are tied with the highest
priority, the Backup with the highest IP address
becomes the Master for the VRID.
100 for all
Backups Changing the backup
priority
on page 108
Preference of
timer source When you save a Backup configuration, the
software can save the configured VSRP timer
values or the VSRP timer values received from
the Master.
Saving the current timer values instead of the
configured ones helps ensure consistent timer
usage for all the VRID devices.
NOTE
The Backup always gets its timer scale value from
the Master.
Configured timer
values are saved Saving the timer
values received from
the master
on page
108
Time-to-Live (TTL) The maximum number of hops a VSRP Hello
packet can traverse before being dropped. You
can specify from 1 - 255.
2 Changing the TTL
setting
on page 108
Hello interval The amount of time between Hello messages
from the Master to the Backups for a given VRID.
The interval can be from 1 - 84 seconds.
One second Changing the hello
interval setting
on
page 109
Dead interval The amount of time a Backup waits for a Hello
message from the Master for the VRID before
determining that the Master is no longer active.
If the Master does not send a Hello message
before the dead interval expires, the Backups
negotiate (compare priorities) to select a new
Master for the VRID.
Three times the
Hello Interval Changing the dead
interval setting
on
page 109
Metro Features
102 FastIron Ethernet Switch Platform and Layer 2 Switching Configuration Guide
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