Configuring Static Route Frr; Configuration Guidelines; Configuration Procedure - HP 5500 EI series Configuration Manual

Configuring static route FRR

A link or router failure on a path can cause packet loss and even routing loop. Static route fast reroute
(FRR) enables fast rerouting to minimize the impact of link or node failures.
Figure 1 Network diagram
As shown in
routes matching the specified criteria. Packets are directed to the backup next hop to avoid traffic
interruption.

Configuration guidelines

Do not use static route FRR and BFD (for a static route) at the same time.
•
• Static route does not take effect when the backup output interface is unavailable.
Equal-cost routes do not support static route FRR.
•
The backup output interface and next hop cannot be modified directly or the same as the primary
•
output interface and next hop.
• Static route FRR is available only when the state of primary link (with Layer 3 interfaces staying up)
changes from bidirectional to unidirectional or down. A unidirectional link refers to the link through
which packets are forwarded only from one end to the other.

Configuration procedure

To configure static route FRR:
Step
1. Enter system view.
2. Configure the source
address of BFD echo
packets.
Figure 1, upon a link failure, FRR specifies a backup next hop by using a routing policy for
Command
system-view
bfd echo-source-ip ip-address
10
Remarks
N/A
By default, the source address
of BFD echo packets is not
configured.
For more information about
this command, see High
Availability Command
Reference.