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> "In the early days of MPLS, the payload was almost exclusively IP. Even today the overwhelming majority of carried traffic remains IP." You can pretty much c
by jlgaddis 10y ago
> "In the early days of MPLS, the payload was almost exclusively IP. Even today the overwhelming majority of carried traffic remains IP."
You can pretty much carry "Any Transport over MPLS" (AToM). As mentioned, IP is the most common protocol, of course, but you can "tunnel" almost anything you can think of over an MPLS path: Ethernet, ATM, PPP, HDLC, SONET, etc. Basically, you dump a frame into one side and it comes out the other unmodified -- regardless of the network in between.
As noted in the linked e-mail, an ISP providing (layer 2) transport has (little to) no control over the payload so there's nothing they can do to prevent running into this issue.