R0106-HP MSR Router Series Layer 2 - WAN Configuration Guide(V7)

173
Ste
p
Command Remarks
2. Create a dynamic route
backup group, and add a
network to be monitored to the
group.
standby routing-group
group-number rule ip ip-address
{ mask | mask-length }
[ vpn-instance vpn-instance-name ]
By default, no dynamic route
backup group is created.
The IP address and VPN instance
specified in the standby
routing-group rule command must
be the same as those specified in
the dialer route command.
Enabling dynamic route backup on a backup interface
Before enabling dynamic route backup on a backup interface, make sure DDR is enabled on the
interface. A backup interface can reference multiple dynamic route backup groups.
To enable dynamic route backup on a backup interface:
Ste
p
Command Remarks
1. Enter system view.
system-view N/A
2. Enter the view of the backup
interface.
interface interface-type
interface-number
N/A
3. Enable dynamic route backup.
standby routing-group
group-number
By default, dynamic route backup
is disabled.
Configuring the delay for disconnecting a backup link
Generally, when the primary link recovers, the backup link will be torn down. To prevent route instability,
specify that the backup link remains valid for a period of time after the primary link recovers. Do this by
configuring the delay for disconnecting a backup link.
To configure the delay for disconnecting a backup link:
Ste
p
Command Remarks
1. Enter system view.
system-view N/A
2. Enter the view of the backup
interface.
interface interface-type
interface-number
N/A
3. Configure the delay for
disconnecting a backup link.
standby timer routing-disable
delay
The default setting is 20 seconds.
Configuring the warm-up timer for dynamic route backup
Usually, after a system reboot, configuration recovery is performed. During the recovery, the primary
interface in a dynamic route backup group is down and the routes on the primary interface are
unavailable. As a result, the backup link is dialed when configuration recovery is being performed. After
the configuration recovers, the primary interface goes up, and the routes on it become available. The
backup link, if dialed up successfully, will be brought down shortly after it went up.
To avoid this problem, set the warm-up timer for dynamic route backup to disable the system from dialing
a backup link within a period of time after a reboot.