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Re: [lwip-users] TCP Sessions Scale Limit

From: Anil kumar
Subject: Re: [lwip-users] TCP Sessions Scale Limit
Date: Tue, 27 Feb 2018 19:24:28 +0530

Below is the error i received for each session:
Could you please suggest what macros i should look into

        xmit: 27703
        recv: 1617
        fw: 0
        drop: 1180
        chkerr: 0
        lenerr: 0
        memerr: 20829
        rterr: 0
        proterr: 1180
        opterr: 0
        err: 0
        cachehit: 0

On 27 February 2018 at 18:42, Simon Goldschmidt <address@hidden> wrote:
Anil kumar wrote:
> what is the maximum TCP Session limit tested. 

None that I know of. But I'd expect things to get slow, eventually...

> I am trying to configure 2000 LDP Session i am seeing issues (TCP Errors)
> What would be suggested macro values to be tuned in opt.h such that i can scale TCP Sessions.

Enabled LWIP_STATS and check the stats for an 'err' value.

Also, check a wireshark log to see what's wrong. If you have 2000 clients, your ARP table needs to be big enough, too.


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With Regards
Anil Kumar S N

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