Chapter 1 About Cisco IP Solution Center
About MPLS VPNs
ISC supports multiple CEs per site and multiple sites connected to the same PE. Each CERC has unique route targets (RT), route distinguisher (RD) and VRF naming. After provisioning a CERC, it is a good idea to run the audit reports to verify the CERC deployment and view the topologies created by the service requests. The product supports linking two or more CE routing communities in the same VPN.
Figure 1-10 shows several examples of the topologies that IP Solution Center CERCs can employ.
Figure 1-10 Examples of CERC Topologies
Full mesh; CERC 1 |
| Hub and spoke; CERC 1 | |
CE 1 | CE | 3 | CE 4 |
CE 2
Complex CERCs 3 and 4
CE 1 | CE 3 | CE 4 |
CE 2 | CE 5 | |
CERC 3 |
| CERC 4 |
CE 5 | CE 6 |
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| Multi VPN CERCs |
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| CE 3 (spoke) |
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| CERC 5 |
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| CERC 6 | 28902 |
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CE 1 (hub) | CE 2 (hub) |
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Hub and Spoke Considerations
In
Due to the current MPLS VPN implementation, you must apply a different RD for each spoke VRF. The
Full Mesh Considerations
Each CE Routing Community (CERC) has two distinct RTs: a hub RT and a spoke RT. When building a full mesh topology, always use the hub RT. Thus, when a need arises to add a spoke site for the current full mesh topology, you can easily add the spoke site without reconfiguring any of the hub sites. The existing spoke RT can be used for this purpose. This is a strategy to prevent having to do significant reprovisioning of a full mesh topology to a
Cisco IP Solution Center, 3.0: MPLS VPN Management User Guide, 3.0
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