| kingston 2003-10-25, 9:25 am |
| We have two wireless bridges emitting from a middle building, feeding a
building on either side left and right. These links have been established
for over a year now! Meaning they were working.
We RMA'd one side of the wireless bridge because the devices failed and
waited for the replacement, while the other continued to work fine.
Well the replacement antennas came in and we installed it. Our original link
came up (Without ANY router changes on the cisco 3600). However it seems as
though when that came up our second link went down immediately.
We made numerous troubleshooting attempts and discovered it was a routing
issue. We could see through the wireless management software the link was
working. We placed a laptop before the router on the same subnet of the
bridge on either side, and could ping BOTH sides of the link. We just couldn
't get to the router!
My boss wanted me to change the mask on the router wan on each side from a
..240 to a .0 just to see if we could open up the available devices and have
no out of subnet conflicts.
I made this change on one router, walked across the street and made this
change on the second router. All of a sudden everything went down, and the
MIS tech screamed get it back to what it was! So at least some of the links
would work.
Well I changed it back to the .240 subnet and was planning to walk across
the street to change the other subnet back so they matched on the WAN link,
and he yelled to me STOP they are ALL back up including the link that was
not routing !
Keep in mind one side is set to a subnet of 255.255.255.0 and the other side
is 255.255.255.240, I KNOW this cant work???? Why is it working?
Also what could have happened to the 3600 to lose the routing info. I do
believe that the router lost its WAN ip address because when I went back to
change the addy on the WAN there was no ip assigned to that link, and we had
just changed it 2 minutes before!
P.s. we are using a version of Firmware that I have been told was buggy also
the 121-5(t), can't confirm this.
Thanks guys please help me understand this!
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