On Fri, 13 Apr 2007 08:22:49 +0300, Saku Ytti said:
On (2007-04-12 20:00 -0700), Stephen Satchell wrote:
From a practical side, the cost of developing, qualifying, and selling new chipsets to handle jumbo packets would jack up the cost of inside equipment. What is the payback? How much money do you save going to jumbo packets?
It's rather hard to find ethernet gear operators could imagine using in peering or core that do not support +9k MTU's.
Note that the number of routers in the "core" is probably vastly outweighted by the number of border and edge routers. There's a *lot* of old eBay routers out there - and until you get a clean path all the way back to the source system, you won't *see* any 9K packets. What's the business case for upgrading an older edge router to support 9K MTU, when the only source of packets coming in is a network of Windows boxes (both servers and end systems in offices) run by somebody who wouldn't believe an Ethernet has anything other than a 1500 MTU if you stapled the spec sheet to their forehead? For that matter, what releases of Windows support setting a 9K MTU? That's probably the *real* uptake limiter.