Re: MTU of the Internet?

["Paul J. Zawada" <zawada () ncsa uiuc edu>]

At 12:56 AM 2/5/98 -0800, Tony Li wrote:
> jra () 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 () ncsa uiuc edu     | National Center for Supercomputing Applications
+1 630 686 7825          | http://www.ncsa.uiuc.edu/People/zawada