Configuring Single-Hop Echo Detection; Configuring Ospf Frr - HP 6125XLG Configuration Manual

Step
2. Enter interface view.
3. Enable BFD bidirectional control
detection.

Configuring single-hop echo detection

Step
1. Enter system view.
2. Configure the source address of echo
packets.
3. Enter interface view.
4. Enable BFD single-hop echo
detection.

Configuring OSPF FRR

A link or router failure on a path can cause packet loss and even routing loop until OSPF completes
routing convergence based on the new network topology. FRR uses BFD to detect failures and enables
fast rerouting to minimize the impact of link or node failures.
Figure 19 Network diagram for OSPF FRR
In Figure 19, configure FRR on Router B by using a routing policy to specify a backup next hop. When the
primary link fails, OSPF directs packets to the backup next hop. At the same time, OSPF calculates the
shortest path based on the new network topology, and forwards packets over the path after network
convergence.
You can configure OSPF FRR to calculate a backup next hop by using the loop free alternate (LFA)
algorithm, or specify a backup next hop by using a routing policy.
Command
interface interface-type
interface-number
ospf bfd enable
Command
system-view
bfd echo-source-ip ip-address
interface interface-type
interface-number
ospf bfd enable echo
78
Remarks
N/A
By default, BFD bidirectional
control detection is disabled.
Both ends of a BFD session must be
on the same network segment and
in the same area.
Remarks
N/A
By default, the source
address of echo packets is
not configured.
N/A
By default, BFD single-hop
echo detection is disabled.