Steven, What syntax are you using to change it? There are two commands for changing the mtu size. One is "mtu x" and the other is "ip mtu x" which will not change the size automatically under physical mtu.
-Dave Below is some additional info. regarding this. http://www.cisco.com/univercd/cc/td/doc/product/atm/c8540/12_0/13_19/cmd_ref/i.htm#xtocid13 Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=46700&t=46685 -------------------------------------------------- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]