[rescue] The Practical Guide to FDDI

Dave McGuire mcguire at neurotica.com
Fri Mar 28 15:00:37 CST 2003


On Thursday, March 27, 2003, at 09:32 PM, Chris Hedemark wrote:
> "Even though it has the same speed as Fast Ethernet (100Mbps), FDDI is 
> more efficient because it has a much larger MTU. Ethernet is limited 
> to a packet size of 1536 bytes."
>
> Not so.  That's just the default setting.  Unless you have a Sun 
> ethernet card (at least the gigabit ones, anyway, I'm not sure about 
> the HME's) you can bump the MTU size effectively to 9000 bytes or so.  
> 9000 bytes is a good size because NFS frames are 8K and the extra 
> accounts for the packet overhead.

   As far as I'm aware, jumbo frames area GigE-only thing.  Sub-gigabit 
ethernet's packet size is 1540 bytes.

           -Dave

--
Dave McGuire             "I've grown hair again, just
St. Petersburg, FL           for the occasion."       -Doc Shipley


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