H3C Technologies H3C S7500E Series Switches - Manual (Page 187)

12-6
To do… Use the command… Remarks
Specify a track entry to be
monitored by VRRP
vrrp [ ipv6 ] vrid virtual-router-id
track track-entry-number
[ reduced priority-reduced |
switchover ]
Required
No track entry is specified for
VRRP by default.
z Do not perform track entry monitoring on the IP address owner.
z When the status of the monitored track entry turns from Negative to Positive or Invalid, the
corresponding router restores its priority automatically.
z The monitored track entry can be nonexistent, so that you can first specify the track entry to be
monitored using the vrrp vrid track command, and then create the track entry using the track
command.
z Refer to VRRP Configuration in the High Availability Configuration Guide for details of VRRP.
Configuring Track-Static Routing Collaboration
A static route is a manually configured route. With a static route configured, packets to the specified
destination are forwarded through the path specified by the administrator.
The disadvantage of using static routes is that they cannot adapt to network topology changes. If a
fault or a topological change occurs in the network, the routes will be unreachable and the network
breaks.
To prevent this problem, you can configure another route to back up the static route. When the static
route is reachable, packets are forwarded through the static route; when the static route is
unreachable, packets are forwarded through the backup route, thus avoiding network break and
enhancing network reliability.
You can check the reachability of a static route in real time by establishing collaboration between
Track and static routing.
If you specify the next hop but not the egress interface when configuring a static route, you can
establish collaborations among the static route, the track module, and detection modules, and thus
check the reachability of the static route according to the status of the track entry.
z If the status of the track entry is Positive, then the next hop of the static route is reachable, and
the configured static route is valid.
z If the status of the track entry is Negative, then the next hop of the static route is unreachable, and
the configured static route is invalid.
z If the status of the track entry is Invalid, the configured static route is valid.
Follow these steps to configure the Track-Static Routing collaboration:
To do… Use the command… Remarks
Enter system view system-view —