Command Reference Guide

Open Shortest Path First Commands
CLI Command Reference
September 2014 Page 586
HP Moonshot Switch Module CLI Command Reference
no nsf [ietf] helper strict-lsa-checking
Use this command to allow OSPF to continue as a helpful neighbor in spite of topology changes.
OSPFv2 Stub Router Commands
max-metric router-lsa
To configure OSPF to enter stub router mode, use this command in Router OSPF Global Configuration mode.
When OSPF is in stub router mode, as defined by RFC 3137, OSPF sets the metric in the non-stub links in its
router LSA to LsInfinity. Other routers therefore compute very long paths through the stub router, and prefer
any alternate path. Doing so eliminates all transit traffic through the stub router, when alternate routes are
available. Stub router mode is useful when adding or removing a router from a network or to avoid transient
routes when a router reloads.
You can administratively force OSPF into stub router mode. OSPF remains in stub router mode until you take
OSPF out of stub router mode. Alternatively, you can configure OSPF to start in stub router mode for a
configurable period of time after the router boots up.
If you set the summary LSA metric to 16,777,215, other routers will skip the summary LSA when they compute
routes.
If you have configured the router to enter stub router mode on startup (max-metric router-lsa on-startup), and
then enter max-metric router lsa, there is no change. If OSPF is administratively in stub router mode (the max-
metric router-lsa command has been given), and you configure OSPF to enter stub router mode on startup
(max-metric router-lsa on-startup), OSPF exits stub router mode (assuming the startup period has expired) and
the configuration is updated.
Default Enabled.
Format
nsf [ietf] helper strict-lsa-checking
Modes OSPF Router Configuration
Default
OSPF is not in stub router mode by default
Format
max-metric router-lsa [on-startup seconds] [summary-lsa {metric}]
Mode OSPFv2 Router Configuration
Parameter Description
on-startup (Optional) OSPF starts in stub router mode after a reboot.
seconds (Required if on-startup) The number of seconds that OSPF remains in stub router mode
after a reboot. The range is 5 to 86,400 seconds. There is no default value.
summary-lsa (Optional) Set the metric in type 3 and type 4 summary LSAs to LsInfinity (0xFFFFFF).
metric (Optional) Metric to send in summary LSAs when in stub router mode. The range is 1 to
16,777,215. The default is 16,711,680 (0xFF0000).