Configuring Ospf Nsr; Configuring Bfd For Ospf; Configuring Bidirectional Control Detection - HP FlexFabric 12900E Series Configuration Manual

Task
Trigger OSPF GR.

Configuring OSPF NSR

Nonstop routing (NSR) backs up OSPF link state information from the active process to the standby
process. After an active/standby switchover, NSR can complete link state recovery and route
regeneration without tearing down adjacencies or impacting forwarding services.
NSR does not require the cooperation of neighboring devices to recover routing information, and it is
typically used more often than GR.
IMPORTANT:
A device that has OSPF NSR enabled cannot act as GR restarter.
To enable OSPF NSR:
Step
1. Enter system view.
2. Enter OSPF view.
3. Enable OSPF NSR.

Configuring BFD for OSPF

BFD provides a single mechanism to quickly detect and monitor the connectivity of links between
OSPF neighbors, which improves the network convergence speed. For more information about BFD,
see High Availability Configuration Guide.
OSPF supports the following BFD detection modes:
•
Bidirectional control detection—Requires BFD configuration to be made on both OSPF
routers on the link.
•
Single-hop echo detection—Requires BFD configuration to be made on one OSPF router on
the link.

Configuring bidirectional control detection

Step
1. Enter system view.
2. Enter interface view.
Command
reset ospf [ process-id ] process graceful-restart
Command
system-view
ospf [ process-id | router-id router-id
| vpn-instance vpn-instance-name ]
*
non-stop-routing
Command
system-view
interface
interface-number
99
Remarks
N/A
N/A
By default, OSPF NSR is disabled.
This command takes effect only for the
current process. As a best practice,
enable OSPF NSR for each process if
multiple OSPF processes exist.
Remarks
N/A
interface-type
N/A