C H A P T E R 1 1
RIP and OSPF
205
Figure 21:
Virtual link for stub area
Virtual links are also used to repair a discontiguous backbone area.
For example, in Figure 22, if the connection between ABR1 and the
backbone fails, the connection using ABR2 provides redundancy so
that the discontiguous area can continue to communicate with the
backbone using the virtual link.
Figure 22:
Virtual link providing redundancy
480t_012
ABR
Area 2
Area 1
Area 0
Virtual link
ABR
480t_013
ABR 1
ABR 2
Area 2
Area 1
Area 0
Virtual link
Area 3
Summary of Contents for 480T
Page 16: ...14 P R E F A C E...
Page 88: ...86 C H A P T E R 4 Configuring Switch Ports...
Page 112: ...110 C H A P T E R 5 Virtual LANs VLANs...
Page 152: ...150 C H A P T E R 8 Quality of Service QoS...
Page 166: ...164 C H A P T E R 9 Enterprise Standby Router Protocol...
Page 198: ...196 C H A P T E R 1 0 IP Unicast Routing...
Page 228: ...226 C H A P T E R 1 1 RIP and OSPF...
Page 254: ...252 C H A P T E R 1 3 IPX Routing...
Page 274: ...272 C H A P T E R 1 4 Access Policies...
Page 296: ...294 C H A P T E R 1 6 Using Web Device Manager...
Page 320: ...318 A P P E N D I X A...
Page 328: ...326 A P P E N D I X B...
Page 346: ...344 A P P E N D I X C...
Page 358: ...356 I N D E X...
Page 366: ...364 I N D E X...