Reference Guide

View default route conguration
OS10(config-router-ospf-10)# show configuration
!
router ospf 10
default-information originate always
Summary address
You can congure a summary address for an ASBR to advertise one external route as an aggregate, for all redistributed routes that are
covered by specied address range.
• Congure the summary address in ROUTER-OSPF mode.
summary-address ip-address/mask [not-advertise | tag tag-value]
Congure summary address
OS10(config)# router ospf 100
OS10(config-router-ospf-100)# summary-address 10.0.0.0/8 not-advertise
View summary address
OS10(config-router-ospf-100)# show configuration
!
router ospf 100
summary-address 10.0.0.0/8 not-advertise
Graceful restart
When a networking device restarts, the adjacent neighbors and peers detect the condition. During a graceful restart, the restarting device
and the neighbors continue to forward the packets without interrupting the network performance. The neighbors that help in the restart
process are called as helper routers.
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
Congure text authentication
OS10(config)# interface ethernet 1/1/1
OS10(conf-if-eth1/1/1)# ip ospf authentication-key sample
Layer 3
353