H3C Technologies H3C S12500 Series Switches - Manual (Page 25)

9
Step Command Remarks
3. Enable BFD echo mode for
static routes.
• Method 1:
ip route-static dest-address { mask
| mask-length } interface-type
interface-number next-hop-address
bfd echo-packet [ preference
preference-value ] [ tag tag-value ]
[ description description-text ]
• Method 2:
ip route-static vpn-instance
s-vpn-instance-name&<1-6>
dest-address { mask |
mask-length } interface-type
interface-number next-hop-address
bfd echo-packet [ preference
preference-value ] [ tag tag-value ]
[ description description-text ]
Use either method.
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, FRR designates a backup next hop by using a routing policy for
routes matching the specified criteria. Packets are directed to the backup next hop to avoid traffic
interruption.
Configuration prerequisites
Create a routing policy to be referenced by FRR and use the apply fast-reroute backup-interface
command to specify a backup next hop in a routing policy. For more information about the command
and routing policy configurations, see "Configuring routing policies."
Configuration guidelines
• Static route FRR takes effect only for static routes that have both the output interface and next hop
specified.
• Do not use FRR and BFD at the same time.