Please find the attachment for the network diagram. MSAN is connected to the layer 2 access switch SW3. SW3 has two uplinks, one goes to SW1 and other goes to SW2. SW1 has the uplink to one of the PE and SW2 has the uplink to other PE. MSAN provides Internet, Voice and IPTV. Internet is using PPPoE. So there is an l2 tunnel from MSAN to BRAS which is connected to the MPLS. MSAN will use only one vlan for all the access PVCs. Voice is provided using L3 vpn. MSAN should access the VOICE VPN via both PE routers. IPTV is using multcast. PIM is configured till PE routers. Requirment is as follows,
1)Failure of links between switches and routers should not affect any services.
2) Failure of switches or routers should not affect the any services.
What is the solution to acchive the requirments?
We need to have redundant PPPOE connection via both PE routers.