Central Services VPN Routing

This topic describes the routing characteristics of a central services VPN.

This topic describes the routing characteristics of a central services VPN.

W 2003, Cisco Systems, Inc. All rights reserved.

Client routes need to be exported to server site.

• Server routes need to be exported to client and server sites.

• No routes are exchanged between client sites.

W 2003, Cisco Systems, Inc. All rights reserved.

The figure illustrates the MPLS VPN routing model that is used to implement a central services VPN:

■ Client 1 and Client 2 have their own RTs (100:101, 100:102) that they import and export; they also export networks with RT 100:303 and import networks with RT 100:203.

Note Client-specific RTs were introduced to comply with the implementation requirements of

Cisco IOS Release 12.0 T, in which each VRF has to have at least one of its export RTs configured as its import RT.

■ The central site imports and exports networks with the RT of its VPN, but it also imports networks with RT 100:303 and exports networks with RT 100:203.

Client 1:

■ Exports all networks with RTs 100:101 and 100:303

■ Imports all networks that carry RT 100:101 or 100:203

Client 2:

■ Exports all networks with RTs 100:102 and 100:303

■ Imports all networks that carry RT 100:102 or 100:203

Central site:

■ Exports all networks with RT 100:203

■ Imports all networks that carry RT 100:303

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