Enabling An L2Tp Rbs - Huawei NetEngine80E Configuration Manual - Reliability

HUAWEI NetEngine80E/40E Router
Configuration Guide - Reliability

11.7.4 Enabling an L2TP RBS

An RBS can be enabled to back up L2TP services.
Context
Perform the following steps on each of routers that back up each other:
Procedure
Step 1 Run:
system-view
The system view is displayed.
Step 2 Run:
remote-backup-profile profile-name
The RBP view is displayed.
Step 3 Run:
service-type l2tp
An L2TP RBS is enabled.
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11.7.5 Controlling Advertisement of L2TP Hot Backup Routes
If L2TP hot backup is configured on LACs that work in load balancing mode, the LACs must
be configured to control route advertisement.
Context
If L2TP hot backup is configured, the LACs can be configured to control route advertisement
in either of the following modes:
l
l
Issue 02 (2014-09-30)
NOTE
If information about an L2TP tunnel, an L2TP session, or a PPPoE session has been backed up, the undo
service-type l2tp command cannot be run.
Manual control: A LAC uses a loopback interface to establish an L2TP tunnel with an LNS.
Two LACs are configured with hot backup and work in load balancing mode. The master
LAC advertises the cost value of the route to the loopback IP address is smaller than that
the slave LAC advertises, allowing the route to the loopback address on the master LAC
to be preferentially used. The cost values can be set in a routing policy, which allows the
route to the loopback IP address of the master LAC to have higher route precedence than
that to the loopback IP address of the slave LAC. For information about how to configure
a routing policy, see Configuring a Routing Policy in HUAWEI NetEngine80E/40E Router
Configuration Guide - IP Routing.
Automatic control: A routing policy can be configured to trust cost values of imported
routes to loopback IP addresses of the LACs. This control mode is easier to configure than
manual control. Automatic control prevents the problem that if a fault in a LAC occurs and
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11 Multi-node Backup Configuration
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