Re: Fw: [Bugme-new] [Bug 1148] New: when using ipsec with DSL connections communication will hang if mtu is 1500(the default value)

[Michael Richardson <mcr@xxxxxxxxxxxxxxxxxxxxxx>]

>>>>> "Andrew" == Andrew Morton <akpm@xxxxxxxx> writes:
    Andrew> Distribution:
    Andrew> Hardware Environment:
    Andrew> Software Environment:
    Andrew> Problem Description:

    Andrew> Steps to reproduce: 
    Andrew> Startup a tunneling connection, if one of the gw interfaces has
    Andrew> mtu=1500, 
    Andrew> communication will hang after transfering some data through
    Andrew> tunnel. As far as I 
    Andrew> know the problem will occure with DSL connections only.

  If by "DSL", you mean PPPoE, then you are dealing with layers of tunnels.

  This sure sounds like a classif pmtud blackhole problem.

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]   Michael Richardson, Sandelman Software Works, Ottawa, ON    |net architect[
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