BGP uses TCP. Differing MTU has no impact on update generation in BGP. BGP 
today has a maximum message size of 4096 bytes. TCP slices and dices that into 
IP packets of its own choosing.

--
Jakob Heitz.


On Nov 17, 2011, at 12:37 AM, "iLya" <[email protected]> wrote:

> I've read the draft but couldn't attend the session due to clash in 
> schedule.
> 
> One point which is currently missing in the draft and which I consider very 
> important is effect of transition to "jumbo" on BGP. Many BGP 
> implementations today group updates to similar peers and format them only 
> once then replicate to multiple peers. Formatting is arguably more 
> resource-consuming compare to replication. When MTU is the same for all IXP 
> customers, then most of UPDATE messages will be formatted only once. During 
> transition period there will be peers with different MTU, and depending on 
> BGP implementation more than one formatting will be required. It would be 
> nice if the draft could be updated to address this subject.
> 
> Kind regards,
> iLya
> 
> --------------------------------------------------
> From: "Christopher Morrow" <[email protected]>
> Sent: Thursday, November 17, 2011 9:09 AM
> To: <[email protected]>; <[email protected]>; "Martin J. Levy" 
> <[email protected]>
> Subject: [GROW] ixp jumbo frames doc
> 
>> We had a bit of a lively discussion in the meeting today about:
>> <http://tools.ietf.org/html/draft-mlevy-ixp-jumboframes-00>
>> 
>> Some of the topics covered were:
>> o Is there a problem with CRC problems with 9k ?
>> o is this something that the IEEE reigns supreme on?
>> o should there be other methods of deployment?
>> o is this a BCP instead of Informational doc?
>> o should this be adopted for WG work?
>> 
>> We'll pass along a separate call for adoption as well, but keep these
>> points in mind (and hopefully let's chat some about these as well)
>> 
>> -chris
>> (co-chair)
>> _______________________________________________
>> GROW mailing list
>> [email protected]
>> https://www.ietf.org/mailman/listinfo/grow
>> 
>> 
> 
> 
> 
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