Re: Convert HDLC T-1 to sub-if to configure multi-vrf CE
I would say you need to use VRF-lite in order to do this efficiently.
All other solutions will require tunnelling which is not efficient.
One possibility is to have a single site that has the routes to the Internet i.e. a central DC site. This would mean that a default route would take all internet bound traffic to the DC whereby it will be routed to an 'Internet' circuit. This is a common method and usually involves a MPLS L2Transport circuit into the DC site which terminates between an Internet router and a CE/Fw. This will require a L2 protocol that can deliver discreet L2 paths i.e. FR or Ethernet VLANs. The advantage is reduced tunnelling but introduces suboptimal/hairpin routing.
An alternative is L2TPv3 from each CE to an Internet CE
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