Configuring Bfd For Is-Is; Configuring Is-Is Frr - HP FlexFabric 12900E Series Configuration Manual

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
1. Enter system view.
2. Enter IS-IS view.
3. Enable IS-IS NSR.

Configuring BFD for IS-IS

BFD provides a single mechanism to quickly detect and monitor the connectivity of links between
IS-IS neighbors, reducing network convergence time. For more information about BFD, see High
Availability Configuration Guide.
To configure BFD for IS-IS:
Step
1. Enter system view.
2. Enter interface view.
3. Enable IS-IS on an interface.
4. Enable BFD on an IS-IS
interface.

Configuring IS-IS FRR

A link or router failure on a path can cause packet loss and routing loop. IS-IS FRR enables fast
rerouting to minimize the failover time.
Figure 41 Network diagram for IS-IS FRR
Router A
Command
system-view
isis [ process-id ] [ vpn-instance
vpn-instance-name ]
non-stop-routing
Command
system-view
interface
interface-number
isis enable [ process-id ]
isis bfd enable
Backup nexthop: Router C
Router B
Remarks
N/A
N/A
By default, IS-IS NSR is disabled.
IS-IS NSR takes effect on a per-process
basis. As a best practice, enable NSR for
each IS-IS process.
interface-type
Nexthop: Router D
161
Remarks
N/A
N/A
N/A
By default, an
interface is not enabled with
BFD.
Router E
IS-IS