Level3 / Cogent / NetFlix BGP Assistance

Sun Dec 4 17:14:57 UTC 2016

Hey all,

In early October our traffic levels from NetFlix went from about half Level3 and
half Cogent - pretty well balanced - to all on Level3.  Standard multihomed BGP
setup with minimal TE if I can help it.  I am starting to run into problems with
a full gigabit port on Level3 and only 100-200mbps on Cogent at that colo.  I
tried padding, I even tried 65000:2906 bgp community, but it seems like if our
level3 port is up NetFlix chooses it solely.  How can I load balance NetFlix
traffic across my two ports so that I am not paying for overages and/or forced
to up to a 10G port immediately?  I have 3 other providers at that colo and
cannot find any mix of bgp tricks to get some of it thru our other providers.

I notice AS2906 has a localpref of 86 - odd ...

The 108.175.47.0/24 block seems to be using as 2906 so I thought a 65000:2906
wouldn't announce those prefixes to them at all.  I have about 10 prefixes being
announced so I could implement a no-export on some of them to load balance but
that doesn't work.

Thx,

Sam

BGP routing table entry for 108.175.47.0/24

Paths: (2 available, best #1)

  2906

  AS-path translation: { 108.175.47.0/24 }

   ear3.LosAngeles1 (metric 100000)

    Origin IGP, metric 30334, localpref 86, valid, internal, best

    Community: 2906:51081 North_America Lclprf_86 United_States Level3_Peer
Los_Angeles Level3:10984

    Originator: ear3.LosAngeles1

  2906

  AS-path translation: { 108.175.47.0/24 }

   ear3.LosAngeles1 (metric 100000)

    Origin IGP, metric 30334, localpref 86, valid, internal

    Community: 2906:51081 North_America Lclprf_86 United_States Level3_Peer
Los_Angeles Level3:10984

    Originator: ear3.LosAngeles1