Huawei Quidway S3500 Series Operation Manual page 218

Operation Manual - Routing Protocol
Quidway S3500 Series Ethernet Switches
RTA RTA
Figure 4-4 OSPF areas
The backbone area (area 0) cannot be configured as the STUB area and the
virtual link cannot pass through the STUB area. That is, if a virtual link has been
set up between RTB and RTC, neither area1 nor area0 can be configured as a
stub area. In the above figure, only area 2 can be configured as stub area.
Routers in the STUB area cannot redistribute the external routes.
Backbone area must guarantee the connectivity of all nodes.
area0 area0 area1 area1
RTB RTB
Huawei Technologies Proprietary
area2 area2
RTC RTC
4-30
Chapter 4 OSPF Configuration
RTD RTD