Dell S4820T Configuration Manual page 672

Enabling OSPFv2 Authentication
To enable or change various OSPF authentication parameters, use the following commands.
• Set a clear text authentication scheme on the interface.
CONFIG-INTERFACE mode
ip ospf authentication-key key
Configure a key that is a text string no longer than eight characters.
All neighboring routers must share password to exchange OSPF information.
• Set the authentication change wait time in seconds between 0 and 300 for the interface.
CONFIG-INTERFACE mode
ip ospf auth-change-wait-time seconds
This setting is the amount of time OSPF has available to change its interface authentication type.
When you configure the auth-change-wait-time, OSPF sends out only the old authentication
scheme until the wait timer expires. After the wait timer expires, OSPF sends only the new
authentication scheme. However, the new authentication scheme does not take effect immediately
after the authentication change wait timer expires; OSPF accepts both the old as well as new
authentication schemes for a time period that is equal to two times the configured authentication
change wait timer. After this time period, OSPF accepts only the new authentication scheme.
This transmission stops when the period ends.
The default is 0 seconds.
Enabling OSPFv2 Graceful Restart
Graceful restart is enabled for the global OSPF process.
For more information, refer to
The Dell Networking implementation of OSPFv2 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.
NOTE: By default, OSPFv2 graceful restart is disabled.
To enable and configure OSPFv2 graceful restart, use the following commands.
1. Enable OSPFv2 graceful-restart globally and set the grace period.
CONFIG-ROUTEROSPF- id mode
graceful-restart grace-period seconds
The seconds range is from 40 and 3000.
672
Graceful Restart.
Open Shortest Path First (OSPFv2 and OSPFv3)