I have a design question regarding a Service provider style MPLS PoP with dual 6500 PE Routers.
Each MPLS PoP currently is running two PE routers for resiliency.The CE routers dual home to each MPLS PE router at Layer 3 into the MPLS VPN/vrf. The traffic is load balanced in/out for different VRF's based on HSRP and routing preferences.
My question is what is the benefit or pros and cons of running Virual Switchi system (VSS) on the two 6500 PE routers and treating the two as One logical PE router.
I can understand the benefit of VSS with Multichassis Etherchannel (MEC) in a Data center or access layer type setup, but not sure if it is recommended or beneficial to run VSS on a Service provider MPLS setup for PoP node resiliency
With the current setup I can manipulate the traffic based on routing preferences and have more control. But with VSS since the device is acting as one PE router, will i have the same ability to control traffic patterns?
My other concern is that on the dual homed CE routers, the PE-CE BGP routes will appear coming from one PE whilst in VSS, same BGP neighbour. This may be harder to troubleshoot issues.