Configuring Single-Hop Echo Detection; Configuring Ospf Frr; Configuration Prerequisites - HP FlexFabric 12900E Series Configuration Manual

Step
3. Enable
control detection.

Configuring single-hop echo detection

Step
1. Enter system view.
2. Configure
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 enables fast rerouting to minimize the
impact of link or node failures.
Figure 23 Network diagram for OSPF FRR
Router A
As shown in
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. It 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.

Configuration prerequisites

Before you configure OSPF FRR, perform the following tasks:
•
Configure IP addresses for interfaces to ensure IP connectivity between neighboring nodes.
•
Enable OSPF.
BFD bidirectional
Command
system-view
the source
bfd echo-source-ip ip-address
interface
interface-number
ospf bfd enable echo
Backup nexthop: Router C
Router B
Figure 23, configure FRR on Router B by using a routing policy to specify a backup next
Command
ospf bfd enable
interface-type
Nexthop: Router D
100
Remarks
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.
Router E