Configuring stub routers

A stub router is used for traffic control. It reports its status as a stub router to neighboring OSPF routers. The neighboring routers do not use the stub router to forward data although they have a route to it.

Router LSAs from the stub router might contain different link type values. A value of 3 means a link to a stub network, and the cost of the link will not be changed by default. To set the cost of the link to 65535, specify the include-stub keyword in the stub-router command. A value of 1, 2 or 4 means a point-to-point link, a link to a transit network, or a virtual link. On such links, a maximum cost value of 65535 is used. Neighbors do not send packets to the stub router as long as they have a route with a smaller cost.

To configure a router as a stub router:

Step	Command	Remarks
1. Enter system view.	system-view	N/A
2. Enter OSPF view.	ospf [ process-id \| router-id router-id \| vpn-instance vpn-instance-name ] *	N/A
3. Configure the router as a stub router.	stub-router [ external-lsa [ max-metric-value ] \| include-stub \| on-startup { seconds \| wait-for-bgp [ seconds ] } \| summary-lsa [ max-metric-value ] ] *	By default, the router is not configured as a stub router. A stub router has no associations with a stub area.

Step

Command

Remarks

1. Enter system view.

system-view

N/A

2. Enter OSPF view.

ospf [ process-id | router-id router-id | vpn-instance vpn-instance-name ] *

N/A

3. Configure the router as a stub router.

stub-router [ external-lsa [ max-metric-value ] | include-stub | on-startup { seconds | wait-for-bgp [ seconds ] } | summary-lsa [ max-metric-value ] ] *

By default, the router is not configured as a stub router.

A stub router has no associations with a stub area.

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Disabling interfaces from receiving and sending OSPF packets	home	Configuring OSPF authentication