Connectivity Guide

Redistributing Routes
You can add routes from other routing instances or protocols to the OSPFv3 process.
With the redistribute command, you can include RIP, static, or directly connected routes in the OSPF process. Route
redistribution is also supported between OSPF Routing process IDs.
To add redistributing routes, use the following command.
● Specify which routes are redistributed into the OSPF process.
CONF-IPV6-ROUTER-OSPF mode
redistribute {bgp | connected | static} [metric metric-value | metric-type type-value]
[route-map map-name] [tag tag-value]
Configure the following required and optional parameters:
○ bgp | connected | static: enter one of the keywords to redistribute those routes.
○ metric metric-value: The range is from 0 to 4294967295.
○ metric-type metric-type: enter 1 for OSPFv3 external route type 1 OR 2 for OSPFv3 external route type 2.
○ route-map map-name: enter a name of a configured route map.
○ tag tag-value: The range is from 0 to 4294967295.
Configuring a Default Route
To generate a default external route into the OSPFv3 routing domain, configure the following parameters.
To specify the information for the default route, use the following command.
● Specify the information for the default route.
CONF-IPV6-ROUTER-OSPF mode
default-information originate [always [metric metric-value] [metric-type type-value]]
[route-map map-name]
Configure the following required and optional parameters:
○ always: indicate that default route information is always advertised.
○ metric metric-value: The range is from 0 to 4294967295.
○ metric-type metric-type: enter 1 for OSPFv3 external route type 1 OR 2 for OSPFv3 external route type 2.
○ route-map map-name: enter a name of a configured route map.
Enabling OSPFv3 Graceful Restart
Follow the procedure in this section to configure graceful restart for OSPFv3. By default, OSPFv3 graceful restart is disabled
and functions only in a helper role to help restarting neighbor routers in their graceful restarts when it receives a Grace LSA.
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By default, OSPFv3 graceful restart is disabled and functions only in a helper role to help restarting neighbor routers in their
graceful restarts when it receives a Grace LSA.
To enable OSPFv3 graceful restart, enter the ipv6 router ospf process-id command to enter OSPFv3 configuration
mode. Then configure a grace period using the graceful-restart grace-period command. The grace period is the time
that the OSPFv3 neighbors continue to advertise the restarting router as though it is fully adjacent. When you enable graceful
restart (restarting role), an OSPFv3 restarting expects its OSPFv3 neighbors to help when it restarts by not advertising the
broken link.
When you enable the helper-reject role on an interface using the ipv6 ospf graceful-restart helper-reject
command, you reconfigure OSPFv3 graceful restart to function in a restarting-only role. OSPFv3 does not participate in the
graceful restart of a neighbor.
NOTE: Enter the ipv6 ospf graceful-restart helper-reject command in Interface configuration mode.
NOTE: For graceful-restart configuration to work, you must configure grace-period. Use graceful-restart grace-
period command to configure grace-period.
Open Shortest Path First (OSPFv2 and OSPFv3) 657