Configuring stub routers

A stub router is used for traffic control. It reports its status as a stub router to neighboring OSPFv3 routers. The neighboring routers can have a route to the stub router, but they do not use the stub router to forward data.

Use either of the following methods to configure a router as a stub router:

Clear the R-bit of the Option field in Type-1 LSAs. When the R-bit is clear, the OSPFv3 router can participate in OSPFv3 topology distribution without forwarding traffic.
Use the OSPFv3 max-metric router LSA feature. This feature enables OSPFv3 to advertise its locally generated Type-1 LSAs with a maximum cost of 65535. 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 OSPFv3 view.	ospfv3 [ process-id \| vpn-instance vpn-instance-name ] *	N/A
3. Configure the router as a stub router.	Method 1:stub-router r-bit [ include-stub \| on-startup { seconds \| wait-for-bgp [ seconds ] } ] * Method 2:stub-router max-metric [ external-lsa [ max-metric-value ] \| summary-lsa [ max-metric-value ] \| include-stub \| on-startup { seconds \| wait-for-bgp [ seconds ] } ] *	By default, the router is not configured as a stub router. A stub router is not related to a stub area.

Step

Command

Remarks

1. Enter system view.

system-view

N/A

2. Enter OSPFv3 view.

ospfv3 [ process-id | vpn-instance vpn-instance-name ] *

N/A

3. Configure the router as a stub router.

Method 1:stub-router r-bit [ include-stub | on-startup { seconds | wait-for-bgp [ seconds ] } ] *
Method 2:stub-router max-metric [ external-lsa [ max-metric-value ] | summary-lsa [ max-metric-value ] | include-stub | on-startup { seconds | wait-for-bgp [ seconds ] } ] *

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

A stub router is not related to a stub area.

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