Dell S5148F-ON OS10 Enterprise Edition User Guide Release 10.3.2E-R1 - Page 264

When graceful restart is enabled, the restarting device retains the routes learned by OSPF in the forwarding table. To re establish OSPF adjacencies with neighbors, the restarting OSPF process sends a grace LSA to all neighbors. In response, the helper router enters helper mode and sends an acknowledgement back to the restarting device. OS10 supports graceful restart helper mode. Use the graceful-restart role helper-only command to enable the helper mode in the ROUTER OSPF mode. OS10(config)# router ospf 10 OS10(conf-router-ospf-10)# graceful-restart role helper-only Use the no version of the command to disable the helper mode. OSPFv2 authentication You can enable OSPF authentication either with clear text or with MD5. • Set a clear text authentication scheme on the interface in INTERFACE mode. ip ospf authentication-key key • Set MD5 authentication in INTERFACE mode. ip ospf message-digest-key keyid md5 key Configure text authentication OS10(config)# interface ethernet 1/1/1 OS10(conf-if-eth1/1/1)# ip ospf authentication-key sample View text authentication OS10(conf-if-eth1/1/1)# show configuration ! interface ethernet1/1/1 ip address 10.10.10.2/24 no switchport no shutdown ip ospf 100 area 0.0.0.0 ip ospf authentication-key sample Configure MD5 authentication OS10(config)# interface ethernet 1/1/1 OS10(conf-if-eth1/1/1)# ip ospf message-digest-key 2 md5 sample12345 View MD5 authentication OS10(conf-if-eth1/1/1)# show configuration ! interface ethernet1/1/1 ip address 10.10.10.2/24 no switchport no shutdown ip ospf 100 area 0.0.0.0 ip ospf message-digest-key 2 md5 sample12345 Troubleshoot OSPFv2 You can troubleshoot the OSPFv2 operations, and check questions for any typical issues that interrupt a process. • Is OSPF enabled globally? • Is OSPF enabled on the interface? • Are adjacencies established correctly? • Are the interfaces configured for L3 correctly? 264 Layer 3