Configuring Ldp Nsr - HP HSR6800 Configuration Manual

Configuration procedure
The LDP GR feature and the LDP NSR feature are mutually exclusive. Do not configure both
features on the device.
To configure LDP GR:
Step
1. Enter system view.
2. Enter MPLS LDP view.
3. Enable MPLS LDP GR.
4. Set the FT reconnect time.
5. Set the LDP neighbor
liveness time.
6. Set the LDP recovery time.
Gracefully restarting MPLS LDP
To test whether the MPLS LDP GR configuration has taken effect, you can perform graceful restart of
MPLS LDP. During the LDP restart process, you can see whether the packet forwarding path is
changed and whether packet forwarding is interrupted.
The graceful-restart mpls ldp command is intended only for testing the MPLS LDP GR function. It
does not perform active/standby switchover.
To restart MPLS LDP gracefully:
Task
Restart MPLS LDP gracefully.

Configuring LDP NSR

Nonstop routing (NSR) is a mechanism for keeping on data transmission during an active/standby
switchover. In standalone mode, NSR for LDP can back up LDP session information and LSP
information from the active MPU to the standby MPU of a device. In IRF mode, NSR for LDP can
back up LDP session information and LSP information from the global active MPU to the global
standby MPU. When a switchover occurs, the standby MPU can immediately pick up the LDP
service, implementing nonstop data transmission.
The LDP GR function can also implement nonstop data forwarding, but it requires that the GR
restarter and all its neighbors support LDP GR. With the LDP NSR function, the neighboring devices
do not need to support LDP NSR. They are not aware of any switchover event on the NSR-enabled
device.
The LDP GR feature and the LDP NSR feature are mutually exclusive. Do not configure both
features on the device.
To configure LDP NSR:
Step
1. Enter system view.
2. Enter MPLS LDP view.
Command
system-view
mpls ldp
graceful-restart
graceful-restart timer
reconnect timer
graceful-restart timer
neighbor-liveness timer
graceful-restart timer recovery
timer
Command
graceful-restart mpls ldp
Command
system-view
mpls ldp
23
Remarks
N/A
N/A
Disabled by default.
Optional.
300 seconds by default.
Optional.
120 seconds by default.
Optional.
300 seconds by default.
Remarks
Available in user view.
Remarks
N/A
N/A