345To do… Use the command… RemarksStep 1 Enter system view system-view —Step 2 Enter OSPFv3 view ospfv3 [ process-id ] —Step 3 Enter OSPFv3 areaview area area-id —Step 4 Configure the area as astub area stub [ no-summary ] RequiredNot configured by defaultStep 5 Specify a cost for thedefault route advertisedto the stub areadefault-cost value OptionalDefaults to 1• You cannot remove an OSPFv3 area directly. The area can be removed only when you remove allconfigurations in area view and all interfaces attached to the area become down.• All the routers attached to a stub area must be configured with the stub command. The keyword no-summary is only available on the ABR of the stub area.• If you use the stub command with the keyword no-summary on an ABR, the ABR advertises a defaultroute in an Inter-Area-Prefix-LSA into the stub area. No AS-external-LSA, Inter-Area-Prefix-LSA, or Inter-Area-Router-LSA is advertised in the area. The stub area of this kind is also known as a totally stub area.Configuring an OSPFv3 virtual linkYou can configure a virtual link to maintain connectivity between a non-backbone area and thebackbone, or in the backbone itself.To do… Use the command… RemarksStep 1 Enter system view system-view —Step 2 Enter OSPFv3 view ospfv3 [ process-id ] —Step 3 Enter OSPFv3 areaview area area-id —Step 4 Configure a virtual linkvlink-peer router-id [ hello seconds |retransmit seconds | trans-delay seconds |dead seconds | instance instance-id ] *Required• Both ends of a virtual link are ABRs that must be configured with the vlink-peer command.• Do not configure virtual links in the areas of a GR-capable process.
