MTU of the Internet?

Paul J. Zawada zawada at ncsa.uiuc.edu
Thu Feb 5 16:27:03 UTC 1998


At 12:56 AM 2/5/98 -0800, Tony Li wrote:
>jra at scfn.thpl.lib.fl.us (Jay R. Ashworth) writes:
>
>> > Unless your ISP uses BBN Butterflies and C30 IMPs in its backbone, I
>> > would discount the odds of running into a link with an MTU of 576.
>> 
>> How do I program my router to emulate one of those?
>
>You don't need to.  It's already there.  You just need to configure it:
>
>	conf term
>	  int serial 0
>	  ip mtu 576
>	  no ip route-cache
>	  <repeat for all interfaces>
>	no router bgp 109
>	router egp 109
>	  ...
>	^Z

To truly emulate the Butterfly's performance, wouldn't you have to do a
hardware mod and put a divide-by-64 on the clock? 

;-)

--zawada  

Paul J. Zawada, RCDD     | Senior Network Engineer
zawada at ncsa.uiuc.edu     | National Center for Supercomputing Applications
+1 630 686 7825          | http://www.ncsa.uiuc.edu/People/zawada



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