I have the following stack
Switch Model Pluggable Model SW Version
---------------- ------------------------------- -------------
Unit #1 5520-48T-PWR 45:None 46:None 47:SX 48:SX 6.2.7.019
Unit #2 5520-48T-PWR 45:None 46:None 47:SX 48:SX 6.2.7.019
Unit #3 5510-48T 47:None 48:None 6.2.7.019
Unit #4 5510-48T 47:None 48:None 6.2.7.019
It took me a while to get this far- but what I have found is that Ports 1/25-48 and 2/25-48 are intermittently dropping power to ports, and then bringing it back almost instantaneously.
This issue is affecting Phones, Access Points and a Netgear PoE powered switch.
The temporary fix is to move all my PoE devices to ports 1/1-24,2/1-24 and they are rock solid in those ports.
I'm running 6.2.7.019 secure with 6.0.0.18 diagnostic. PoE Module FW: 6370.4
PoE usage for these units is very low, usually between 35 and 45 watts each out of a max of 320.
ALHSV-SW24#show poe-main-status unit 1
PoE Main Status - Unit# 1
--------------------------------------------------
Available DTE Power : 320 Watts
DTE Power Status : Normal
DTE Power Consumption : 38 Watts
DTE Power Usage Threshold : 80 %
Power Pairs : Signal
Traps Control Status : Enable
PD Detect Type : 802.3af and Legacy
Power Source Present : AC Only
AC Power Status : Present
DC Power Status : Not Present
ALHSV-SW24#show poe-main-status unit 2
PoE Main Status - Unit# 2
--------------------------------------------------
Available DTE Power : 320 Watts
DTE Power Status : Normal
DTE Power Consumption : 40 Watts
DTE Power Usage Threshold : 80 %
Power Pairs : Signal
Traps Control Status : Enable
PD Detect Type : 802.3af and Legacy
Power Source Present : AC Only
AC Power Status : Present
DC Power Status : Not Present
ALHSV-SW24#
I do have the switches set up to support 802.3af and Legacy both, but I will test this evening to see if I can switch to just 802.3af.
Have any of you seen this?
Also, I believe this is a software or configuration bug as Avaya has already advance replaced these switches and that did not solve the problem. I do have a service request open with Avaya but I would like to see if others have experienced this issue. I think the fact that only ports 25-48 on each of the 5520s indicates that there are at least two PoE planes in these units.
Thanks for your time!
