North American Network Operators Group

Date Prev | Date Next | Date Index | Thread Index | Author Index | Historical

Re: jumbo frames

  • From: Kurt Kayser
  • Date: Fri Apr 27 11:20:07 2001

Hi,

Isn't it a lot more cpu-intensive to 'collect' some 1500-byte frames
into some larger bucket, reassemble it into a jumbo-frame when the next
box has to chop it in order to send it out on a Sonet/PPP/etc interface which 
might have a smaller MTU again?

Doesn't make too much sense to me. I guess that was Tony's aim as well..

Kurt
 
> Roeland you are talking about jumbo frames from the end system lan, while
> John is talking about only using the jumbo frames between the routers. My
> point was that in John's environment the packets will all be 1500 since the
> packets are restricted to that size just to get to the router with the GE
> interface. I understand that there are perf gains as long as the entire path
> supports the larger packets, but I don't understand the claim that having a
> bigger pipe in the middle helps.
> 
> Tony
> 
-- 
noris network AG   *  tel +49 911 93 52-0    *  internet
Kilianstra�e 142  *  fax +49 911 93 52-100  *  solution
90425 N�rnberg   *  http://www.noris.net   *  provider