From: John Conzone (jkconzone@xxxxxxxx)
Date: Fri May 05 2000 - 22:52:25 GMT-3
Well, I wish it were all that complicated, but it isn't.
I figured it out, and it was operator error and I was the
operator.
Bottom line is I stayed up to watch Philly and Pittsburgh last
night (I have to have some sort of lame excuse), and was tired and
forgot to add the passive interface statements to EIGRP for the new
subs. They were in their for the old ethernets. They were being
advertised out both routers on the LAN side also.
Hence, our arch nemesis from routing 101, the routing loop, reared
its ugly head. Hey send me the packet, okay. Now I send it back to
you, now you send it back to me! Oh what fun we are having sending
packets to each other and screwing this lame engineer.
A pox on all routers and their houses! Oh yeah, I'm ready for the
lab! NOT!
Lesson learned is never do any changes on a Friday afternoon after
work with a 15 minute outage window after a bitch of a week and after
staying up half the morning to watch an excellent hockey game! Or
maybe I need to pay more attention to detail. Yeah, thats the ticket!
By the way, I'm a Ranger fan, but since they blew it, I'm pulling
for Philly, then Toronto.
----- Original Message -----
From: pbosio@comtech.com.au
To: John Conzone
Sent: Friday, May 05, 2000 8:50 PM
Subject: Re: One of those days!
John,
Don't know what type of router you have but I assume its either a
Cisco 4700,
3600 or something with a 100mbps fast ethernet port running ISL
trunking.
I cannot tell you how many issues I have had with this, has been a
real
showstopper. You end up pulling out your hair.
Issues with ARP has been the major one, cannot ping devices in the
same subnet,
try for a minutes then it works.
There are stacks of bugs relating to this on CCO. If you have a
login to CCO do
a search on ARP, ISL, you will get about 300 hits on any IOS
version.
Also, make sure that the router and switch port are hard code for
speed and
duplex to match, DO NOT let routers and switches auto-neg, will
come back to
bite you on the bum later on after one device reboots.
Good Luck,
Paul
Theres nothing worse when you have to wait for an outage to do work
and if
things go wrong, having to wait again.
One of those days where you tell the customer that its minor
change, and
that there will be no impact, and your local Cisco SE comes in and
blesses your
little 4 ethernet port to 1 FA ISL sub-int conversion.
Of course, EIGRP converges and the subnets hose up, and the
customer can't
get out to the WAN, and the Cisco SE dosen't understand either, and
he built the
damn network, and the customer won't give you even 5 minutes to
figure out whats
wrong cause its outside the normal outage window!
Sometimes you eat the bear, and sometimes the bear eats you! We
obviously
missed something, but will have to wait a few weeks until I can get
an outage
window. Pissed me off!!!!!! Humbling also. I was so
sure............
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