Associating Track with VRRP
When VRRP is operating in standard mode or load balancing mode, associate the Track module with the VRRP group to implement the following actions:
Change the priority of a router according to the status of the uplink. If a fault occurs on the uplink of the router, the VRRP group is not aware of the uplink failure. If the router is the master, hosts in the LAN cannot access the external network. To resolve this problem, configure a detection module-Track-VRRP collaboration. The detection module monitors the status of the uplink of the router and notifies the Track module of the detection result.
When the uplink fails, the detection module notifies the Track module to change the status of the monitored track entry to Negative. The priority of the master decreases by a user-specified value. A router with a higher priority in the VRRP group becomes the master.
Monitor the master on a backup. If a fault occurs on the master, the backup operating in switchover mode will switch to the master immediately to maintain normal communication.
When VRRP is operating in load balancing mode, associate the Track module with the VRRP VF to implement the following functions:
Change the priority of the AVF according to its uplink state. When the uplink of the AVF fails, the track entry changes to negative state. The weight of the AVF decreases by a user-specified value. The VF with a higher priority becomes the new AVF to forward packets.
Monitor the AVF status from the LVF. When the AVF fails, the LVF that is operating in switchover mode becomes the new AVF to ensure continuous forwarding.
When you associate Track with VRRP, follow these restrictions and guidelines:
VRRP tracking does not take effect on an IP address owner. The configuration takes effect when the router does not act as the IP address owner.
An IP address owner is the router with its interface IP address used as the virtual IP address of the VRRP group.
When the status of the track entry changes from negative to positive or NotReady, the associated router or VF restores its priority automatically.
Associating Track with a VRRP group
Step | Command | Remarks |
|---|---|---|
1. Enter system view. | system-view | N/A |
2. Enter interface view. | interface interface-type interface-number | N/A |
3. Associate a track entry with a VRRP group. | vrrp [ ipv6 ] vrid virtual-router-id track track-entry-number { forwarder-switchover member-ip ip-address | priority reduced [ priority-reduced ] switchover | weight reduced [ weight-reduced ] } | By default, no track entry is specified for a VRRP group. This command is supported when VRRP is operating in both standard mode and load balancing mode. |
Associating Track with a VRRP VF
Step | Command | Remarks |
|---|---|---|
1. Enter system view. | system-view | N/A |
2. Enter interface view. | interface interface-type interface-number | N/A |
3. Associate Track with a VRRP VF. | vrrp [ ipv6 ] vrid virtual-router-id track track-entry-number { forwarder-switchover member-ip ip-address | priority reduced [ priority-reduced ] switchover | weight reduced [ weight-reduced ] } | By default, no track entry is specified for a VF. This command is configurable when VRRP is operating in standard mode or load balancing mode. However, this command takes effect only when VRRP is operating in load balancing mode. |