Re: [Exim] large number of command timeouts using Exim-4.20

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Author: Tony Earnshaw
Date:  
To: Nigel Metheringham
CC: exim-users
Subject: Re: [Exim] large number of command timeouts using Exim-4.20
Nigel Metheringham wrote:
> On Sun, 2003-08-10 at 18:06, Tony Earnshaw wrote:
>
>>Christian Vogel wrote:
>>
>>
>>>please don't turn off path-mtu-discovery. It helps your system to
>>>discover the optimal packet size between it and the other side of
>>>a tcp-connection. It normally only breaks with badly configured routers
>>>and/or firewalls and this way you are doing those idiot-admins a favour
>>>by working around their brain-dead settings.
>>
>>It breaks a large number of routers. Sad, but true. Better to do without it.
>
>
> If you switch off PMTU discovery and have a normal ethernet (1500) MTU
> set then chunks of the internet will vanish to you as well....



Could be ...

ppp0      Link encap:Point-to-Point Protocol
           inet addr:212.238.97.135  P-t-P:194.159.73.222
Mask:255.255.255.255
           UP POINTOPOINT RUNNING NOARP PROMISC MULTICAST  MTU:1524
Metric:1
           RX packets:2 errors:0 dropped:0 overruns:0 frame:0
           TX packets:3 errors:0 dropped:0 overruns:0 carrier:0
           collisions:0 txqueuelen:3
           RX bytes:32 (32.0 b)  TX bytes:47 (47.0 b)


2728 [root:billy.demon.nl] /root # cat /proc/sys/net/ipv4/ip_no_pmtu_disc
1

I'm doing o.k. with kernel.org 2.4.19. I had to turn it off long ago.

Best,

Tony


--
Tony Earnshaw

Looking backwards is always easy with hindsight

http://www.billy.demon.nl
Mail: tonni@???