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Operation Manual – Routing Protocol
Quidway S5600 Series Ethernet Switches-Release 1510
Chapter 4 OSPF Configuration
Huawei Technologies Proprietary
4-32
RTA
RTB
RTC
RTD
Area 0
Area 1
Area 2
RTA
RTB
RTC
RTD
Area 0
Area 1
Area 2
Figure 4-5
OSPF area
z
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.
z
A router in a stub area cannot receive external routes.
z
The backbone area must guarantee the connectivity between various nodes.