R0106-HP MSR Router Series Layer 3 - IP Routing Configuration Guide(V7)

96
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 is used
more often than GR.
IMPORTANT:
A
device that has OSPF NSR enabled cannot act as GR restarter.
To enable OSPF NSR:
Ste
p
Command Remarks
1. Enter system view.
system-view N/A
2. Enter OSPF view.
ospf [ process-id | router-id router-id |
vpn-instance vpn-instance-name ] *
N/A
3. Enable OSPF NSR.
non-stop-routing By default, OSPF NSR is disabled.
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
Ste
p
Command Remarks
1. Enter system view.
system-view N/A
2. Enter interface view.
interface interface-type
interface-number
N/A
3. Enable BFD bidirectional control
detection.
ospf bfd enable
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.
Configuring single-hop echo detection
Ste
p
Command Remarks
1. Enter system view.
system-view N/A