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NetStructure™ 480T Routing Switch User Guide
Figure 13.1: Virtual link for stub area
You can use virtual links to repair a discontiguous backbone area. In
Figure 13.2, if the connection between ABR1 and the backbone fails,
the ABR2 connection provides redundancy so the discontiguous area
continues to communicate with the backbone using the virtual link.
Figure 13.2: Virtual link providing redundancy
480t_012
ABR
Area 2 Area 1 Area 0
Virtual link
ABR
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®
ABR 1 ABR 2
480T_017R
Area 2
Area 1 Area 0 Area 3
Virtual link
3421
7865
11 12109
13 161514
Rx TxRx TxRx TxRx Tx
3421
7865
11 12109
13 161514
Rx TxRx TxRx TxRx Tx
®
®