Reference Guide

Open Shortest Path First (OSPFv2 and OSPFv3) | 681
Enable OSPFv2 authentication
Use the following commands in CONFIGURATION INTERFACE mode to enable or change various
OSPF authentication parameters:
Enable graceful restart
Graceful Restart is enabled for the global OSPF process. Use these commands to configure OSPF graceful
restart. Refer to Graceful Restart for feature details.
The Dell Force10 implementation of OSPF graceful restart enables you to specify:
•
grace period—the length of time the graceful restart process can last before OSPF terminates it.
•
helper-reject neighbors—the router ID of each restart router that does not receive assistance from the
configured router.
•
mode—the situation or situations that trigger a graceful restart.
•
role—the role or roles the configured router can perform.
You enable OSPF graceful restart in CONFIGURATION ROUTER OSPF mode.
Command Syntax Command Mode Usage
ip ospf authentication-key
key
CONFIG-INTERFACE Set clear text authentication scheme on the interface.
Configure a key that is a text string no longer than eight
characters.
All neighboring routers must share the same password to
exchange OSPF information.
ip ospf
auth-change-wait-time
seconds
CONFIG-INTERFACE Set the authentication change wait time in seconds
between 0 and 300 for the interface. This is the amount
of time OSPF has available to change its interface
authentication type. During the auth-change-wait-time,
OSPF sends out packets with both the new and old
authentication schemes. This transmission stops when
the period ends. The default is 0 seconds.
Note: By default, OSPF graceful restart is disabled.
Command Syntax Command Mode Usage
graceful-restart
grace-period
seconds
CONFIG-ROUTER-OSPF-id Enable OSPF graceful-restart globally and set the grace period.
Seconds range: between 40 and 3000
This is the period of time that an OSPF router’s neighbors will advertise it as fully adjacent,
regardless of the synchronization state, during a graceful restart.
OSPF terminates this process when the grace period ends.