Huawei Quidway S5600 Series Operation Manual page 345

Operation Manual – Routing Protocol
Quidway S5600 Series Ethernet Switches-Release 1510
RTA RTA
Figure 4-5 OSPF area
A virtual link cannot pass through a stub area. The backbone area (Area 0) cannot
be configured as a stub area. So, if a virtual link has been set up between RTB and
RTC, neither Area 1 nor Area 0 can be configured as a stub area. In Figure 4-5,
only Area 2 can be configured as a stub area.
A router in a stub area cannot receive external routes.
The backbone area must guarantee the connectivity between various nodes.
Area 0 Area 0 Area 1 Area 1
RTB RTB
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Area 2 Area 2
RTC RTC
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Chapter 4 OSPF Configuration
RTD RTD