Enabling Ospf Ispf; Configuring Ospf Gr; Configuring The Ospf Gr Restarter - HP 6125XLG Configuration Manual

Step
2. Enter OSPF view.
3. Configure the LSU
transmit rate.

Enabling OSPF ISPF

When the topology changes, Incremental Shortest Path First (ISPF) computes only the affected part of the
SPT, instead of the entire SPT.
To enable OSPF ISPF:
Step
1. Enter system view.
2. Enter OSPF view.
3. Enable OSPF ISPF.

Configuring OSPF GR

GR ensures forwarding continuity when a routing protocol restarts or an active/standby switchover
occurs.
Two routers are required to complete a GR process. The following are router roles in a GR process.
GR Restarter—Graceful restarting router. It must have GR capability.
•
GR Helper—A neighbor of the GR Restarter. It helps the GR Restarter to complete the GR process.
•
OSPF GR has the following types:
IETF GR—Uses Opaque LSAs to implement GR.
•
Non-IETF GR—Uses link local signaling (LLS) to advertise GR capability and uses out of band
•
synchronization to synchronize the LSDB.
A device can act as a GR Restarter and GR Helper at the same time.

Configuring the OSPF GR Restarter

You can configure the IETF or non IETF OSPF GR Restarter.
Configuring the IETF OSPF GR Restarter
Step
1. Enter system view.
Command
ospf [ process-id | router-id router-id |
vpn-instance vpn-instance-name ] *
transmit-pacing interval interval count count
Command
system-view
ospf [ process-id | router-id router-id |
vpn-instance vpn-instance-name ] *
ispf enable
Command
system-view
75
Remarks
N/A
By default, an OSPF interface
sends up to three LSU packets
every 20 milliseconds.
Remarks
N/A
N/A
By default, OSPF ISPF is
enabled.
Remarks
N/A