It seems like lots of people in the WISP-world are running MPLS just to use VPLS. Reasons for doing this are typically to achieve better IPv4 utilization (not having to route a block of IP's to each POP and maybe wasting IPv4, etc).
Another common use-case is providing L2VPN services for customers (connecting multiple locations together, etc). On Wed, Nov 20, 2019 at 2:03 PM Adam Moffett <[email protected]> wrote: > I think I don't fully understand what the advantages are of MPLS. > > I mean I've been reading the white-papers and such, and I see it brings > some features to the table, but when are we going to use them? > > Routing speed: > > - MPLS can make forwarding decisions faster. When they made this in > the 1990's I'm sure that was a big deal, but I'm doubting whether there is > really measurably better latency on modern hardware. Is there? > > > Traffic Engineering: > > - It can do redundancy, but it seems to rely on the routing protocol > (eg OSPF) to know which paths are up. I don't understand what that buys > us. > - It can do load sharing on unequal paths. Admittedly that's very > hard to do with L3 routing protocols, and that would have been extremely > useful at one point in time. But how often does that happen now that we're > in a world of gigabit and 10gigabit connections? > > L2 tunneling > > - It can transport L2 traffic over an L3 network. It does it with > less overhead (8 bytes) than any other method I can think of. I don't > really see a downside to this. > > So are people running MPLS just to get VPLS tunnels, or do you find that > the other tools in the MPLS toolbox matter in today's world? > -- > AF mailing list > [email protected] > http://af.afmug.com/mailman/listinfo/af_af.afmug.com >
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