R0106-HP MSR Router Series Layer 3 - IP Routing Command Reference(V7)

177
Usage guidelines
If you want to use prefix suppression, HP recommends that you configure prefix suppression on all OSPF
routers.
To disable an OSPF process from advertising the prefixes of loopback and passive interfaces, configure
prefix suppression on the interfaces by using the ospf prefix-suppression command.
When prefix suppression is enabled:
• On P2P and P2MP networks, OSPF does not advertise Type-3 links in Router LSAs. Other routing
information can still be advertised to ensure traffic forwarding.
• On broadcast and NBMA networks, the DR generates Network LSAs with a mask length of 32 to
suppress network routes. Other routing information can still be advertised to ensure traffic
forwarding. If no neighbors exist, the DR also does not advertise the primary IP addresses of
interfaces in Router LSAs.
Examples
# Enable prefix suppression for OSPF process 1.
<Sysname> system-view
[Sysname] ospf 1
[Sysname-ospf-1] prefix-suppression
Related commands
ospf prefix-suppression
reset ospf event-log
Use reset ospf event-log to clear OSPF log information.
Syntax
reset ospf [ process-id ] event-log [ peer | spf ]
Views
User view
Predefined user roles
network-admin
Parameters
process-id: Specifies an OSPF process by its ID in the range of 1 to 65535.
peer: Clears neighbor log information.
spf: Clears route calculation log information.
Usage guidelines
If both the peer and spf keywords are not specified, the command clears both neighbor log information
and route calculation log information.
Examples
# Clear OSPF route calculation log information for all OSPF processes.
<Sysname> reset ospf event-log spf
Related commands
display ospf event-log