H3C Technologies H3C S12500-X Series Switches - Manual (Page 103)

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Step Command Remarks
2. Enter interface view. interface interface-type interface-number N/A
3. Enable prefix
suppression on the
interface.
ospf prefix-suppression [ disable ]
By default, prefix suppression
is disabled on an interface.
50B
Configuring prefix prioritization
This feature enables the device to install prefixes in descending priority order: critical, high, medium, and
low. The prefix priorities are assigned through routing policies. When a route is assigned multiple prefix
priorities, the route uses the highest priority.
By default, the 32-bit OSPF host routes have a medium priority and other routes a low priority.
To configure prefix prioritization:
Step 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 prefix
prioritization.
prefix-priority route-policy route-policy-name
By default, prefix prioritization
is disabled.
51B
Configuring OSPF PIC
Prefix Independent Convergence (PIC) enables the device to speed up network convergence by ignoring
the number of prefixes.
When both OSPF PIC and OSPF FRR are configured, OSPF FRR takes effect.
OSPF PIC applies to only inter-area routes and external routes.
To configure OSPF PIC:
Step 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 PIC for
OSPF.
pic [ additional-path-always ]
By default, OSPF PIC is
enabled.
52B
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.