H3C Technologies H3C S5560 Series Switches - Manual (Page 110)

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Step Command Remarks
3. Enable prefix
suppression for the
interface.
ospf prefix-suppression [ disable ]
By default, prefix suppression
is disabled on an interface.
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.
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 only to inter-area routes and external routes.
Enabling 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.
Configuring BFD for OSPF PIC
By default, OSPF PIC does not use BFD to detect primary link failures. To speed up OSPF convergence,
enable BFD single-hop echo detection for OSPF PIC to detect the primary link failures.
To configure BFD for OSPF PIC:
Step Command Remarks
1. Enter system view. system-view N/A