R0106-HP MSR Router Series High Availability Configuration Guide(V7)

68
Ste
p
Command Remarks
2. Associate Track with interface
management.
• Create a track entry, and associate it
with the interface management module
to monitor the link status of an
interface:
track track-entry-number interface
interface-type interface-number [ delay
{ negative negative-time | positive
positive-time } * ]
• Create a track entry, and associate it
with the interface management module
to monitor the Layer 3 protocol status of
an interface:
track track-entry-number interface
interface-type interface-number
protocol { ipv4 | ipv6 } [ delay
{ negative negative-time | positive
positive-time } * ]
Use either method.
No track entry is created by
default.
Associating the Track module with an application
module
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, you can configure the detection
module-Track-VRRP collaboration. The detection modules can monitor 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 router 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.