The stub command sets an area to a stub area.
The undo stub command cancels the settings.
By default, no area is set to a stub area.
| Parameter | Description | Value |
|---|---|---|
| no-summary | Disables an ABR from sending non-default Type 3 LSAs to the stub area. This parameter applies only to ABRs of stub areas. If the parameter is configured on an ABR, the ABR advertises only one default Type 3 LSA (no other Type 3 LSAs) to the stub area. In this case, this area is also called a totally stub area. | - |
| default-route-advertise | Configures an ABR to advertise a default Type 3 LSA to the stub area. This parameter applies only to ABRs of stub areas. | - |
| backbone-peer-ignore | Prevents an ABR from checking the neighbor status when the ABR generates a default Type 3 LSA and advertises it to the stub area. This parameter applies only to ABRs of stub areas. If the parameter is configured on an ABR, the ABR generates a default Type 3 LSA and advertises it to the stub area as long as an interface is Up in the backbone area. | - |
Usage Scenario
There are two configuration commands for stub areas: stub and default-cost. The stub area attribute must be configured on all switches in a stub area using the stub command.
The default-cost command takes effect only when it is configured on an ABR. The command is used to specify the cost of the default summary route transmitted by the ABR to the stub area.
Precautions
The backbone area cannot be configured as a stub area.