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Re: [lwip-users] retransmission every 9 pacakets.
From: |
Kieran Mansley |
Subject: |
Re: [lwip-users] retransmission every 9 pacakets. |
Date: |
Wed, 12 Sep 2007 10:08:51 +0100 |
On Wed, 2007-09-12 at 16:55 +0800, Yang wrote:
> Hi all.
> I am useing Lwip 1.11 for a few months.It seems to work fine until
> I found it would do a retransmission every 9 tcp packets!. ack was sent
> back every 2 pacakets.
> I found out this with ethereal. It seem that after 9 packets, lwip
> stop to send the next packet and wait for an ack until timeout and make
> a retransmission. I knew that it is some how connected to the
> TCP_TMR_INTERVAL and TCP_FAST_INTERVAL as it disgussed in this list .
> I set them as fallow
> #ifndef TCP_TMR_INTERVAL
> #define TCP_TMR_INTERVAL 250
> #ifndef TCP_FAST_INTERVAL
> #define TCP_FAST_INTERVAL TCP_TMR_INTERVAL
> I had try to set TCP_FAST_INTERVAL as TCP_TMR_INTERVAL+50( or 100) ,
> the result is same!
Can you provide a copy of the ethereal trace?
Kieran