Configuring Bfd For Is-Is; Configuring Is-Is Frr - HP 6125XLG Layer 3 - Ip Routing Configuration Manual

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 OSPF
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 uses BFD to detect
failures and enables fast rerouting to minimize the failover time.
Figure 39 Network diagram for IS-IS FRR
In Figure 39, after you enable FRR on Router B, IS-IS automatically calculates or designates a backup next
hop when a link failure is detected. In this way, packets are directed to the backup next hop to reduce
traffic recovery time. Meanwhile, IS-IS calculates the shortest path based on the new network topology,
and forwards packets over the path after network convergence.
You can either enable IS-IS FRR to calculate a backup next hop automatically, or designate a backup next
hop with a routing policy for routes matching specific criteria.
Command
system-view
isis [ process-id ] [ vpn-instance
vpn-instance-name ]
non-stop-routing
Command
system-view
interface interface-type interface-number
isis enable [ process-id ]
isis bfd enable
153
Remarks
N/A
N/A
By default, IS-IS NSR is disabled.
Remarks
N/A
N/A
N/A
By default, an IS-IS interface
is not enabled with BFD.