Hey All, I ran 7.4 code on our 5508's when it came out and noticed that my coverage area was drastically reduced. I had to roll back to 7.3 after I found this bug. It mentions only affecting the 5508 but I've seen many bugs affect platforms that weren't listed. Thought I would add that into the mix for everyone.
TPC in 7.4 reduces transmit power to lower than expected values.
Symptom:
In 7.4, primarily in high density setups, neighbor rssi is much higher
than prior code versions. This causes the transmit power to be lowered.
Conditions:
Workaround:
Setup min - max power levels for TPC, so that the power levels do not
fall below the expected value
Craig Eyre
Network Analyst
IT Services Department
Mount Royal University
4825 Mount Royal Gate SW
Calgary AB T2P 3T5
P. 403.440.5199
E. [email protected]
"The difference between a successful person and others is not a lack of
strength, not a lack of knowledge, but rather in a lack of will." Vincent
T. Lombardi
From: Jeffrey Sessler <[email protected]>
To: [email protected],
Date: 04/25/2013 05:19 PM
Subject: Re: [WIRELESS-LAN] Cisco WiSM2 7.4 stability issues?
Sent by: The EDUCAUSE Wireless Issues Constituent Group Listserv
<[email protected]>
The AP and code download issue, at least the bug mentioned, was a problem
with the code loaded at manufacturing on some WiSM2 cards. The installed
code was missing some of the AP boot code, and without the AP boot code,
AP's never got what they needed. Re-installing the same code and/or newer
fixed it. That's not really a bug out of development - it's a problem with
manufacturing.
As for rebooting AP's - It could be a fringe case that's causing it. We had
a heck of a time with the original 1252 AP's occasionally rebooting/locking
a radio, and the wireless business unit worked directly with us on
resolving the issues. In just about every case, the issue was something
unexpected from a client, and once identified, Cisco coded around it.
If you'd like to pass on specific issues, I'd be happy to raise them via my
channels. My local team seems to get a pretty fast response from the
wireless business unit.
Jeff
>>> On Thursday, April 25, 2013 at 3:35 PM, in message
<[email protected]>, Lee H
Badman <[email protected]> wrote:
Hi Jeff,
Agreed on client stuff, but not on rebooting APs and code downloads that
hang. Its just too much in line with Cisco's long bug train a' running...
Would be different if this wasnt premium equipment.
Lee H. Badman
Network Architect/Wireless TME
ITS, Syracuse University
315.443.3003
________________________________________
From: The EDUCAUSE Wireless Issues Constituent Group Listserv
[[email protected]] on behalf of Jeffrey Sessler
[[email protected]]
Sent: Thursday, April 25, 2013 5:42 PM
To: [email protected]
Subject: Re: [WIRELESS-LAN] Cisco WiSM2 7.4 stability issues?
Lee,
You can't test for every scenario. With the diverse client base of EDU, I
suspect we run up against many fringe-cases that are impossible to
duplicate (or test for) in a lab.
Jeff
>>> On Thursday, April 25, 2013 at 12:15 PM, in message
<[email protected]>, Lee H Badman
<[email protected]> wrote:
It’s sheer lunacy. I can’t describe it any other way. Can you imagine how
this sort of bug makes it into prod code? Or the one where 1400 APs
reboot once a day?
I encourage my fellow Cisco customers to be heard.
-Lee Badman
From: The EDUCAUSE Wireless Issues Constituent Group Listserv
[mailto:[email protected]] On Behalf Of Jeffrey Sessler
Sent: Thursday, April 25, 2013 3:01 PM
To: [email protected]
Subject: Re: [WIRELESS-LAN] Cisco WiSM2 7.4 stability issues?
7.4MR is do out mid-May and the bug mentioned is fixed. The fix will also be
in 8.0.
Jeff
>>> On Wednesday, April 24, 2013 at 11:59 AM, in message
<[email protected]<
mailto:[email protected]>>, "Sullivan, Ryan"
<[email protected]<mailto:[email protected]>> wrote:
We have two WiSM2s that were ordered with 7.4.100.0 and have run into
CSCtr41909 “WiSM2 - New out of box, APs are stuck in downloading state”. It
looks like the 7.4 MSE code (which broke both of our 3350s when upgrading)
has been removed.
Going back to 7.2…
Ryan Sullivan
Datacommunications
ACT, UCSD
[email protected]<mailto:[email protected]>
858-822-5602
On Apr 24, 2013, at 11:21 AM, LaMarr Baucom
<[email protected]<mailto:[email protected]>> wrote:
Yes, they have given me three different engineering builds and they have all
crashed. I've had to revert to 7.3 three times.
Sent from my phone.
LaMarr Baucom
Wireless Network Engineer
Murray State University
Phone: (270)809-2299
On Apr 24, 2013 1:03 PM, "Joe Roth"
<[email protected]<mailto:[email protected]>> wrote:
Has anyone else seen stability issues with 7.4? We had to downgrade from 7.4
to 7.3 due to our 1142 APs crashing. We had the patched engineering
release that was supposed to fix this, but apparently there were multiple
1142 issues. The bug that we were hitting has yet to be patched.
Our hopes in going to 7.4 was to use a single HA only controller in a "pool"
with our production controllers. Apparently this feature was
implemented in 7.4. Has anyone been able to use this? We did not get to test
it due to the downgrade.
Thanks.
--
Joe Roth
Networking Group
Binghamton University
Ph. 607-777-7528<tel:607-777-7528>
Fax 607-777-4009<tel:607-777-4009>
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