![]() After after a little more testing I noticed that the RD displayed under that command was actually the sending router's RD. show ip bgp vpnv4 all on the 7206 showed me the mBGP routes I had learned, with their appropriate RT and the 10:10 RD that I thought referred to the VRF they were landing in. I set up a test VRF with RD and RT of 10:10 and everything worked immediately. I was seeing some strange asymmetric behavior, where the newer routers in the existing MPLS network (Brocade NetIrons) were receiving the routes exported from the 7206, but the 7206 was not receiving their routes. No bother, that's what RT import and export are for - right? Wrong. The older router (VXR 7206) did indeed support 4 byte ASNs for most things, but wouldn't let me set a VRF's RD with one. The standard that had been used for the RD and RT in the existing MPLS network was ASN:VLAN, and the BGP ASN happened to be 4 byte. One of the more interesting challenges I encountered during this project was how mBGP distributes routes. I've been working on bringing an older router functioning as an LNS into an MPLS network, so we can land dial in connections within a VRF.
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