[lwip-users] Re: [lwip] congestion window problem

[Mumtaz Ahmad]

I think i have got the problem and a possible soultion .cwnd  is defined as
unsigned short and its value cannot exceed 65535 . increasing cwnd beyond
that value gives unpredictable results . I think it should be unsigned long
.Same is true for ssthresh field .



----- Original Message -----
From: Mumtaz Ahmad <address@hidden>
To: <address@hidden>
Sent: Thursday, April 18, 2002 11:59 AM
Subject: [lwip] congestion window problem


> Hi Guys
>
> I am experiencing a strange trouble while testing TCP bulk data transfer
to
> linux server . When i keep negles algorithm turned on then some times my
> congestion window goes down to as low as 31 which never goes up .This
causes
> a deadlcok and both systems keep on waiting with no communication involved
> .I have seen that there are no retransmissions during this tranfer. When i
> remove negles algo the system behaves perfect  with bigger send window
.With
> smaller window like 2048 i do experience this problem though with less
> frequency.  I think even in worst cases congestion window should not go
down
> below 1 TCP MSS but i am emperiencing congestion window going very low .
Any
> comments or suggestion in this regard ?
> I am also looking into this matter
>
>
> Regards
> Mumtaz Ahmad
>
>        _o
>     _< \_
>    (_) >(_)
>    -------------
>
>
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