Configuring Interface Tracking - 3Com 3C13636 Configuration Manual

3Com Router 3000 Ethernet Family
Configuration Guide
Table 3-6 Configure the Adver_Timer of VRRP
Configure the Adver_Timer of
VRRP.
Restore the default.
The adver_interval argument is in the range 1 to 255 seconds and defalults to 1
second.

3.2.7 Configuring Interface Tracking

The interface tracking function expands the backup functionality of VRRP. It provides
backup not only when the interface to which a standby group is assigned fails but also
when other interfaces on the router become unavailable. This is achieved by tracking
interfaces. When a monitored interface goes down, the priority of the router owning this
interface automatically decreased by the value specified by value-reduced, allowing a
higher priority router in the standby group to take over as the master.
Perform the following configuration in interface view.
Table 3-7 Configure interface tracking
Configure the interface to be tracked.
Disable to track the specified interface.
The priority-reduced argument defaults to 10.
VRRP can track the state of both physical interfaces and logical interfaces such as VT
and dialer interfaces.
The following describes when a VT or dialer interface is regarded up or down:
In MP, a VT interface goes down when IPCP of all PPP links bound with the VT
interface goes down, and goes up when IPCP of one PPP link goes up.
In non-dial PPPoA, a VT interface goes down when IPCP of all PPP links goes
down, and goes up when IPCP of one PPP link goes up.
On a PPPoE or PPPoA server, a VT interface goes down when no session is
present between the server and its client and goes up when PPPoE or PPPoA
creates a session.
Operation
Operation
3Com Corporation
Command
vrrp vrid virtual-router-ID
adver-interval
undo vrrp vrid virtual-router-ID timer advertise
vrrp vrid
interface-type
[ reduced priority-reduced ]
undo vrrp vrid virtual-router-ID track
[ interface-type interface-number ]
3-7
Chapter 3 VRRP Configurations
timer advertise
Command
virtual-router-ID
interface-number
track