10
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
Figure 1
, upon a link failure, packets are directed to the backup next hop to avoid traffic
interruption. You can either specify a backup next hop for FRR or enable FRR to automatically select a
backup next hop (which must be configured in advance).
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, and cannot be 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.
Configuration procedure
Configuring static route FRR by specifying a backup next hop
Step Command
Remarks
1.
Enter system view.
system-view
N/A
