150
Step Command Remarks
5. (Optional.)
Configure the T1
timer.
graceful-restart t1
seconds
count
count
By default, the T1 timer is 3 seconds and
can expire 10 times.
6. (Optional.)
Configure the T2
timer.
graceful-restart t2
seconds
By default, the T2 timer is 60 seconds.
7. (Optional.)
Configure the T3
timer.
graceful-restart t3
seconds
By default, the T2 timer is 300 seconds.
Configuring IS-IS NSR
After an active/standby switchover, the GR restarter obtains routing information from its neighbors,
and the IS-IS process must learn all the routes. If the network topology changes during the
switchover, removed routes cannot be updated to the device, which can result in blackhole routes.
NSR solves the problem by backing up IS-IS link state information from the active process to the
standby process. After an active/standby switchover, NSR can complete link state recovery and
route regeneration without requiring the cooperation of other devices.
IMPORTANT:
IS-IS NSR and IS-IS GR are mutually exclusive. Do not configure them at the same time.
To configure IS-IS NSR:
Step Command Remarks
1. Enter system view.
system-view
N/A
2. Enter IS-IS view.
isis
[ process-id ] [
vpn-instance
vpn-instance-name ]
N/A
3. Enable IS-IS NSR.
non-stop-routing
By default, IS-IS NSR is disabled.
Configuring BFD for IS-IS
BFD provides a single mechanism to quickly detect and monitor the connectivity of links between
OSPF neighbors, reducing network convergence time. For more information about BFD, see High
Availability Configuration Guide.
To configure BFD for IS-IS:
Step Command Remarks
1. Enter system view.
system-view
N/A
2. Enter interface view.
interface
interface-type
interface-number
N/A
3. Enable IS-IS on an interface.
isis enable
[ process-id ] N/A
4. Enable BFD on an IS-IS
interface.
isis bfd enable
By default, an IS-IS
interface is not enabled with
BFD.
To Next Page
Loading...
Need help?
General