R2511-HP MSR Router Series High Availability Configuration Guide(V5)

28
To associate Track with VRRP VF:
Ste
p
Command Remarks
1. Enter system view.
system-view N/A
2. Enter interface view.
interface interface-type
interface-number
N/A
3. Create a VRRP group and
configure its virtual IP
address.
vrrp vrid virtual-router-id virtual-ip
virtual-address
No VRRP group is created by
default.
4. Associate Track with VRRP VF.
• Associate a track entry with the
VRRP VF:
vrrp [ ipv6 ] vrid virtual-router-id
weight track track-entry-number
[ reduced weight-reduced ]
• Configure the LVF to monitor the
AVF status through the track
entry:
vrrp [ ipv6 ] vrid virtual-router-id
track track-entry-number
forwarder-switchover
member-ip ip-address
Use at least one command.
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 function takes
effect only when VRRP is operating
in load balancing mode.
Associating Track with static routing
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. Faults or
topological changes in the network can make the routes unreachable, causing network breaks.
To prevent this problem, 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, avoiding network breaks and enhancing network reliability.
To check the accessibility of a static route in real time, establish association between Track and the static
route.
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. This enables you to
check the accessibility of the static route by the status of the track entry.
• The Positive state of the track entry shows that the next hop of the static route is reachable, and that
the configured static route is valid.
• The Negative state of the track entry shows that the next hop of the static route is not reachable, and
that the configured static route is invalid.
• The Invalid state of the track entry shows that the accessibility of the next hop of the static route is
unknown, and that the static route is valid.
Follow these guidelines when you associate Track with static routing:
• You can associate a nonexistent track entry with a static route. The association takes effect only after
you use the track command to create the track entry.