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Re: mtu mis-match
- From: Greg VILLAIN
- Date: Thu Mar 20 05:40:29 2008
On Mar 19, 2008, at 8:05 PM, ann kok wrote:
Hi
I have this problem about mtu mismatch
Some DSL clients, some are working fine.
(browsing...ping ...)
Some DSL clients have this problem
they can't browse the sites.
they can ssh the host but couldn't run the command in
the shell prompt
ping packet are working fine (no packet lost)
Why?
but I still don't know why mtu can cause this problem
Thank you for your help
Sounds like the old PPPoE issue : 1500 vs 1492.
It usually is dealt with on a per destination basis:
For a given destination (the ones that are causing problems to you)
start with :
ping -D -s 1500 <your_destination> and lower the -s value until the
ping goes through.
-D forces "don't fragment bit"
-s manages packetsize
When your ping reaches your destination, your -s size is good (for
that destination only...).
Greg VILLAIN
Independent Network & Telco Architecture Consultant
Greg VILLAIN
Independant Network & Telco Architecture Consultant
+33 6 87 48 66 14
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