Configuration Guide User guide

642 FastIron Configuration Guide
53-1002494-02
VSRP
Configuring basic VSRP parameters
To configure VSRP, perform the following required tasks:
• Configure a port-based VLAN containing the ports for which you want to provide VSRP service.
NOTE
If you already have a port-based VLAN but only want to use VSRP on a sub-set of the VLANs
ports, you can selectively remove ports from VSRP service in the VLAN. Refer to “Removing a
port from the VRID VLAN” on page 646.
• Configure a VRID:
• Specify that the device is a backup. Since VSRP, like VRRP-E, does not have an “owner”,
all VSRP devices are backups. The active device for a VRID is elected based on the VRID
priority, which is configurable.
Hold-down
interval
The amount of time a Backup that has sent a Hello
packet announcing its intent to become Master waits
before beginning to forward traffic for the VRID. The
hold-down interval prevents Layer 2 loops from
occurring during VSRP rapid failover.
The interval can from 1 – 84 seconds.
3 seconds page 649
Track priority A VSRP priority value assigned to the tracked ports. If
a tracked port link goes down, the VRID port VSRP
priority is reduced by the amount of the tracked port
priority.
5 page 649
Track port A track port is a port or virtual routing interface that is
outside the VRID but whose link state is tracked by
the VRID. Typically, the tracked interface represents
the other side of VRID traffic flow through the device.
If the link for a tracked interface goes down, the VSRP
priority of the VRID interface is changed, causing the
devices to renegotiate for Master.
None page 650
Backup preempt
mode
Prevents a Backup with a higher VSRP priority from
taking control of the VRID from another Backup that
has a lower priority but has already assumed control
of the VRID.
Enabled page 650
VRID active state The active state of the VSRP VRID. Disabled page 642
RIP parameters
Suppression of
RIP
advertisements
A Layer 3 Switch that is running RIP normally
advertises routes to a backed up VRID even when the
Layer 3 Switch is not currently the active Layer 3
Switch for the VRID. Suppression of these
advertisements helps ensure that other Layer 3
Switches do not receive invalid route paths for the
VRID.
NOTE: This parameter is valid only on Layer 3
Switches.
Disabled
(routes are advertised)
page 650
TABLE 118 VSRP parameters (Continued)
Parameter Description Default For more
information