Thank You for replying to my question!
We are currently using Enablence access equipment back to a core network for our voice and PPPoE traffic. We met with a Cisco Engineer a month ago on replacing our current core network with new core routers. The Cisco Engineer recommended ASR 9000 series routers over the 7600 router. We are going to build a 10 gig carrier ethernet ring with the likely hood of sending all traffic using VPLS over MPLS on the core.
The question I have and it really did not get answered the day the Cisco Engineer was here was what loop prevention protocols does the ASR 9000 support connecting to our Enablence access equipment? The Enablence Magnum equipment is all layer 2 and the only loop prevention protocols they support is STP and EAPS.
Cisco's Flex Link with Load balancing sounded like the perfect solution for us to disable STP and give us a more carrier grade fail over rate. Even with RSTP the fail over rate is still not fast enough to keep phone calls from dropping.
If you have any suggestions I would be glad to hear them. Thank You for your time!