ssh hangs w/jumbo frames (MTU=9000)

Robert La Ferla robertlaferla at comcast.net
Tue Dec 19 12:18:59 EST 2006


I should add that the problem manifests itself when I ssh into the  
server and "cat" a large text file or such.

On Dec 19, 2006, at 11:47 AM, Robert La Ferla wrote:

> I have been experiencing ssh hangs with my client hosts that are  
> using jumbo frames.  I have a LAN with all Gigabit switches  
> (Netgear), CAT 5e or greater cabling.  This happened from a Mac  
> client (gigabit) and also a Fedora client (Intel gigabit card.)   
> There were no error or warning messages.  I even ran sshd using the  
> debug switch.  When I dropped the MTU to 1500 on the clients (but  
> not the server), they all worked again.  What could be the problem?


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