Dell PowerSwitch S4820T Configuration Guide for the S4820T System 9.100.0 - Page 593
Enabling OSPFv2 Authentication, Enabling OSPFv2 Graceful Restart, Neighbor Count is 0
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Neighbor Count is 0, Adjacent neighbor count is 0 Dell# 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. 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. This setting is the time that an OSPFv2 router's neighbors advertises it as fully adjacent, regardless of the synchronization state, during a graceful restart. OSPFv2 terminates this process when the grace period ends. 2 Enter the Router ID of the OSPFv2 helper router from which the router does not accept graceful restart assistance. CONFIG-ROUTEROSPF- id mode Open Shortest Path First (OSPFv2 and OSPFv3) 593
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