Hi Again,
After looking more closely on the problem I've seen that the packets which
has size 0x05dc(1500) and DF bit set are not been passed between 2 gre
end-point on the same system.
Its really exciting to see output of tcpdump.
http://203.88.135.194/public/greB-dump.txt
http://203.88.135.194/public/greC-dump.txt
Thanks for your suggession for this problem.
-- Sumit
> -----Original Message-----
> From: linux-net-owner@vger.kernel.org
>
> Hi All,
> I've 2 gre tunnels connectivity between 3 system
>
> Internal
> ----linux1(greA)-----(greB)linux2(greC)------(greD)cisco-router ---
> -Internet
>
> In this setup i cannot access few of sites. These sites
> seems DF bit set.
> Following is dump on gre tunnel(greA) on my linux1 box. Same data can be
> seen on greB on linux2. If I replace linux2 with cisco router then
> everything works fine.
> Is it something to do with MTU or any other setting?
> Strange point to me is
> I can access that site from linux1(with lynx) only and only if I set greA
> MTU to 1476(or lower)and greB MTU to 1500(or lower), but not from
> any client
> on my Internal network. I randomly tried with many different MTU settings
> and its combinations. At GreD MTU is 1514, and its my ISP so i cannot have
> anything to do there.
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This archive was generated by hypermail 2b29 : Fri Nov 15 2002 - 22:00:01 EST