Vrrp Tracking; Operation Procedure Of Vrrp - H3C S5600 SERIES Operation Manual

Hide thumbs Also See for S5600 SERIES:

Table of Contents

If you configure the preemption delay for a backup, the switch preempts the master if it does not

receive a VRRP advertisement from the master after it waits for a period three times of the

advertisement interval and the period specified by the preemption delay.

VRRP Tracking

If an IP address owner exists in a VRRP group, you can configure a priority for the IP address

owner. However your configuration will not take effect and the IP address owner will still be the

master of the VRRP group because the system considers the priority of the IP address owner to be

If an IP address owner exists in a VRRP group, the interface/port tracking function configured on

the IP address owner cannot take effect.

Interface tracking function of the VRRP group

When the VLAN interface of the master goes down, if you want the specified backup to become the

master, you can use the interface tracking function. With this function enabled for the VRRP group:

If the tracked VLAN interface of the master goes down, the priority of the switch decreases

automatically by a specified value.

The decrease of the master priority makes the priority of the backup tracking the interface become

higher, and thus the backup becomes the new master.

Port tracking function of the VRRP group

When a physical port of the master goes down, if you want the specified backup to become the master,

you can use the port tracking function. With this function enabled for the VRRP group:

If the tracked physical port of the master goes down, the priority of the master decreases

automatically by a set value.

The decrease of the master priority makes the priority of the backup tracking the port become

higher, and thus the backup becomes the new master.

With VRRP enabled, the switches determine their respective roles in a VRRP group by priority. The

switch with the highest priority acts as the master, which will forward packets to outside networks,

and the switches with lower priorities act as backups. The master sends VRRP advertisements

periodically to notify that it is operating normally.

When a backup receives a VRRP advertisement, it compares its own priority with that in the

advertisement. If its priority is lower, it remains as a backup. Otherwise, it becomes the master.

A backup starts the advertisement interval timer after it receives the advertisement to wait for the

next one from the master. If the backup does not receive VRRP advertisements from the master

after the timer expires, it considers that the master fails and starts the election process to elect a

new master for forwarding packets.

Table of Contents