Users Guide

Neighbor Count is 1, Adjacent neighbor count is 1
Adjacent with neighbor 150.1.1.1(Designated Router)
Default route
You can generate an external default route and distribute the default information to the OSPFv2 routing domain.
● Generate the default route using the default-information originate [always] command in ROUTER-OSPF
mode.
Configure default route
OS10(config)# router ospf 10
OS10(config-router-ospf-10)# default-information originate always
View default route configuration
OS10(config-router-ospf-10)# show configuration
!
router ospf 10
default-information originate always
Summary address
You can configure a summary address for an ASBR to advertise one external route as an aggregate, for all redistributed routes
that are covered by specified address range.
● Configure the summary address in ROUTER-OSPF mode.
summary-address ip-address/mask [not-advertise | tag tag-value]
Configure 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 neighbors continue to forward the packets without interrupting network performance. The neighbors that
help in the restart process are called helper routers.
When you enable graceful restart, the restarting device retains the routes learned by OSPF in the forwarding table. To
re-establish OSPF adjacencies with neighbors, the restart 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 Helper
mode in 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 Helper mode.
936
Layer 3