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DES-7200 Configuration Guide Chapter 4 OSPF
Configuration
4-32
Command Function
DES-7200 # configure terminal
Enter the global configuration mode.
DES-7200 (config)# router ospf 1
Enter the OSPF configuration mode.
DES-7200 (config-router)#
graceful-restart grace-period 100
Enable OSPF GR and set its GR period to
100s.
DES-7200 (config-router)# end
Exit to the privileged EXEC mode.
DES-7200 # show running-config
View the configuration.
DES-7200# write
(Optional) Save the configuration.
4.2.20.3 Configuring the OSPF GR Helper
By default, the OSPF GR Helper is enabled. You are allowed to disable the GR
Helper capabiltiy and configure the GR Helper to detect network change:
Command Function
DES-7200 # configure terminal
Enter the global configuration mode.
DES-7200 (config)# router ospf 1
Enter the OSPF configuration mode.
DES-7200 (config-router)#
graceful-restart helper disable
Disable the OSPF GR Helper.
DES-7200 (config-router)# no
graceful-restart helper disable
Enable the GR Helper again.
DES-7200 (config-router)#
graceful-restart helper
{strict-lsa-checking |
internal-lsa-checking}
Enable the OSPF GR Helper to check the
change of LSA. If the network changes, exit
the GR Helper. By default, the changes of
network are not detected during the GR
Helper.
strict-lsa-checking: check the changes of
types1 to 5 and type 7 LSAs
internal-lsa-checking: check the changes
of types1 to 3 LSAs
DES-7200 (config-router)# end
Exit to the privileged EXEC mode.
DES-7200 # show running-config
View the configuration.
DES-7200# write
(Optional) Save the configuration.
4.2.21 Configuring OSPF BFD
For details, refer to BFD Configuration Guide.