Hi, >I have a question: Other than something like 2547oDMVPN, is there any >implementation of an RFC4797 style PE-PE interconnect using an IP only (no >mpls) core? Where the outer-most transit label is replaced with an IP >header, or GRE header? You can do mpls on a gre tunnel, just configure the tunnel interface for mpls and watch out for mtu issues... Brian