[111289] in North American Network Operators' Group
Re: can I ask mtu question
daemon@ATHENA.MIT.EDU (Bill Stewart)
Tue Feb 3 05:11:12 2009
In-Reply-To: <op.uolf6zfjtfhldh@rbeam.xactional.com>
Date: Tue, 3 Feb 2009 02:11:00 -0800
From: Bill Stewart <nonobvious@gmail.com>
To: adriankok2000@yahoo.com.hk
Cc: nanog@nanog.org
Errors-To: nanog-bounces@nanog.org
>> Which standard are you referring to? AFAIK, nothing above 1500 is
>> standardised
I've had two different kinds of customer requests for jumbo frames
- customers that want very large frames for performance reasons;
Many ethernet switches support 9000 or more, some don't,
and some technologies like ATM support ~4470.
Sometimes the ability to provide them depends on tunnel modes.
- customers that want frames that are at least ~1700-1800 bytes
so that a few layers of IPSEC or VLAN headers or whatever
won't break the 1500-byte packets inside them.
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Thanks; Bill
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