Foundry Networks Switch and Router Installation And Configuration Manual page 837

Parameter Description
Backup priority A numeric value that determines a Backup's
preferability for becoming the Master for the VRID.
During negotiation, the router with the highest priority
becomes the Master.
• VRRP – The Owner has the highest priority
(255); other routers can have a priority from 3 –
254.
• VRRPE – All routers are Backups and have the
same priority by default.
If two or more Backups are tied with the highest
priority, the Backup interface with the highest IP
address becomes the Master for the VRID.
Suppression of A router that is running RIP normally advertises
RIP routes to a backed up VRID even when the router is
advertisements not currently the active router for the VRID.
Suppression of these advertisements helps ensure
that other routers do not receive invalid route paths
for the VRID.
Hello interval The number of seconds between Hello messages
from the Master to the Backups for a given VRID.
The interval can from 1 – 84 seconds.
Dead interval The number of seconds 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determining that the Master is no longer active.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.
Backup Hello The number of seconds between Hello messages
interval from a Backup to the Master.
The message interval can be from 60 – 3600
seconds.
You must enable the Backup to send the messages.
The messages are disabled by default on Backups.
The current Master (whether the VRRP Owner or a
Backup) sends Hello messages by default.
Track port Another Layer 3 Switch port or virtual interface whose
link status is tracked by the VRID's interface.
If the link for a tracked interface goes down, the
VRRP or VRRPE priority of the VRID interface is
changed, causing the devices to renegotiate for
Master.
December 2000
Table 21.1: VRRP and VRRPE Parameters (Continued)
Configuring VRRP and VRRPE
Default See page...
VRRP – 255 for the 21-15
Owner; 100 for each
Backup
VRRPE – 100 for all
Backups
Disabled 21-16
One second 21-4
21-16
Three times the Hello 21-4
Interval plus one-half
21-16
second
Disabled 21-4
60 seconds when 21-17
enabled
None 21-5
21-17
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