From: Joe Rinehart (jjrinehart@hotmail.com)
Date: Wed Oct 13 2004 - 14:02:21 GMT-3
Just when you think you have things halfway figured out you realize how far
off your perceptions can be. I had two "revelations" while working on the
Netmaster DoIt lab #1 (its pretty grueling, in a good way). There were two
things that really bit me because I thought I knew these for certain....
Myth#1 A Catalyst 3550 cannot do BGP.
When the lab asked for this I thought it was a joke, and to be honest I
cannot remember where I picked this idea up, but a quick check on the doc CD
and I found my face turning red (proverbially speaking). I think I was
relying on a "features not supported" on one of the CCIE Cisco Press study
books... In any case there are some limitations but it does indeed support
BGP....
Myth#2 Subinterfaces cannot coexist with natural interfaces on the same
physical interface.
This one blew me away. When I read the question I figured it was one of
those "trick answers" that just had to be interpreted, so I did a multipoint
subinterface and a point to point subinterface. When I was working though
the answer key I was rather taken aback to see that it was on the physical
interface. Still a skeptic, I removed the multipoint subinterface, put the
code on the main interface (leaving the P2P subif) and then reloaded the
router. I was shocked it worked.
I think my reason for posting this is just to see if there have been any
other experiences like this for other folks and what those assumptions were.
After all, there is a saying about assume.....
Joe Rinehart, CCNP, CCDP
Data Network Consultant, AT&T Corporation
Pacific Northwest Enterprise Markets
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