SG300 - 28 p: POE power drops every few minutes

Hi all

We have a SG300 - 28 p which, at intervals between 5 and 30 minutes or more, lower power to all its ports POE-powered and then immediately restores power. Switch logs nothing when this happens other than to record that the ports went down and back up, even with debug logging enabled. Non - POE ports are not affected.

When the problem started there were only four POE devices on the switch and we are far under our power budget. (During the test, I added a fifth device, see below.)

Not all combinations of devices cause the drops occur - specifically, it seems that having devices on ports next to each other causing the drops. When the drops occur, absent the increment of POE devices all counters. I noticed this thread earlier here seemed similar:

https://supportforums.Cisco.com/thread/2165089

but in this case, he got no power at all in the adjacent configurations, instead of having to drop all the several minutes.

I am running

SW06 #sh worm

SW version 1.1.2.0 (November 12, 2011 time 23:34:26)

Start the 1.1.0.6 version (date may 11, 2011 time 18:31)

HW version V02

I have the 1.2.2.7.6 ready to go new firmware, I will update this when I get a chance to test it. Unfortunately, it's a switch of production, but it's a with relatively few devices to it so far. If need be, I have a sf300 - 48P I can exchange this sg300 ENJOI trials.

Thank you for anything you might suggest.

Here are the details:

-' Phone' is a phone to IP Avaya 4610SW or 5610SW (class 2)

-"Watchdog" is an environmental monitor IT Watchdogs Watchdog 100 (class 0)

-"WAP" is a Cisco WAP4410N (class 3)

All initially due to lack of combination:

GI10 phone #1

gi22 phone #2

dog guard gi23

WAP gi24

would result in the POE power to place on all ports, every 5 to 30 minutes.

I disabled Green Ethernet completely - no change.

And then made the following tests:

1. "power never inline" on gi23 and gi24: problem disappeared

2. 'inline power auto"on gi23 and gi24: problem is back

3 ' power inline never' on gi23 only: problem disappeared

4 ' auto of inline power' on gi23: problem is back

5 ' power inline never' on gi24 only: problem disappeared

6. "power inline auto" on gi24: problem is back.

I left gi23 powered throughout the night and it was stable: it's about 10 hours without any problem.

This morning, tried the following configs:

08:54 - worked fine

IG4 watchdog

GI10 phone #1

gi22 phone #2

WAP gi24

10:31 - added another phone, the problem came back

IG4 watchdog

GI10 phone #1

gi22 phone #2

gi23 phone #3

WAP gi24

10:43 - inappropriate phone #3 to IG11 (next) - problem continues

IG4 watchdog

GI10 phone #1

IG11 phone #3

gi22 phone #2

WAP gi24

11:00 - moved phone #3 to gi8 - suite problem

IG4 watchdog

gi8 phone #3

GI10 phone #1

gi22 phone #2

WAP gi24

11:31 - moved phone #3 article IG 14 - the problem disappeared

IG4 watchdog

GI10 phone #1

Article IG 14 phone #3

gi22 phone #2

WAP gi24

and that's where we left things now are stable for about four hours.

The following products are the config more later (11:31).

SW06 #show power inline

Power-limit based port mode

Nominal consumed power unit power use threshold traps

---- ------- ------------- ------------------ --------------- ---------

1 of 180 Watts 18 Watts (10%)         Disable 95

Port power status device status priority class

-------- -------------------- ---------------- ------------ -------- ---------

Article IG1 Auto search low class0

IG2 Auto search low class0

IG3 Auto search low class0

IG4 Auto on low class0

IG5 Auto search low class0

GI6 Auto search low class0

gi7 Auto search low class0

gi8 Auto search low class0

gi9 Auto search low class0

GI10 Auto on low 2

IG11 Auto search low class0

gi12 Auto search low class0

ig13 Auto search low class0

IG 14 Auto article on low 2

gi15 Auto search low class0

gi16 research Auto low class0

IG17 Auto search low class0

gi18 Auto search low class0

IG19 Auto search low class0

IG20 Auto search low class0

IG21 Auto search low class0

gi22 Auto on low 2

gi23 research Auto low class0

gi24 - Auto on low class3

-watchdog:

SW06 #show power inline IG4

Port power status device status priority class

-------- -------------------- ---------------- ------------ -------- ---------

IG4 Auto on low class0

Limit of power (for the mode of power-limit of port): 15.400W

State of the port: Port is on - valid resistance detected

Overload counter: 0

Brief of counter: 0

Denied Counter: 0

Absent of meter: 4

Invalid Signature counter: 0

SW06 #show interfaces announce IG4

Port: IG4

Type: 1 G-copper

Link state:

Autonegotiation: enabled

1000F 1000 h 100f 100 h 10 h 10f

-----  -----  ----  ----  ---  ---

Link admin Local advertising Yes No Yes Yes Yes Yes

Local liaison Oper announced Yes No Yes Yes Yes Yes

Oper Remote link Announces no no Yes Yes Yes Yes

Resolution of priority - Yes-

-Phone:

#show power inline gi10 SW06

Port power status device status priority class

-------- -------------------- ---------------- ------------ -------- ---------

GI10 Auto on low 2

Limit of power (for the mode of power-limit of port): 15.400W

State of the port: Port is on - valid resistance detected

Overload counter: 0

Brief of counter: 0

Denied Counter: 0

Missing Counter: 465

Invalid Signature counter: 0

#show int adv gi10 SW06

Port: gi10

Type: 1 G-copper

Link state:

Autonegotiation: enabled

1000F 1000 h 100f 100 h 10 h 10f

-----  -----  ----  ----  ---  ---

Link admin Local advertising Yes No Yes Yes Yes Yes

Local liaison Oper announced Yes No Yes Yes Yes Yes

Oper Remote link Announces no no Yes Yes Yes Yes

Resolution of priority - Yes-

-Phone:

SW06 #show power inline article IG 14

Port power status device status priority class

-------- -------------------- ---------------- ------------ -------- ---------

IG 14 Auto article on low 2

Limit of power (for the mode of power-limit of port): 15.400W

State of the port: Port is on - valid resistance detected

Overload counter: 0

Brief of counter: 0

Denied Counter: 0

Absent against: 0

Invalid Signature counter: 0

SW06 #show int adv article IG 14

Port: article IG 14

Type: 1 G-copper

Link state:

Autonegotiation: enabled

1000F 1000 h 100f 100 h 10 h 10f

-----  -----  ----  ----  ---  ---

Link admin Local advertising Yes No Yes Yes Yes Yes

Local liaison Oper announced Yes No Yes Yes Yes Yes

Oper Remote link Announces no no Yes Yes Yes Yes

Resolution of priority - Yes-

SW06 #.

-Phone:

#show power inline gi22 SW06

Port power status device status priority class

-------- -------------------- ---------------- ------------ -------- ---------

gi22 Auto on low 2

Limit of power (for the mode of power-limit of port): 15.400W

State of the port: Port is on - valid resistance detected

Overload counter: 0

Brief of counter: 0

Denied Counter: 0

Missing Counter: 591

Invalid Signature counter: 166

#show int adv gi22 SW06

Port: gi22

Type: 1 G-copper

Link state:

Autonegotiation: enabled

1000F 1000 h 100f 100 h 10 h 10f

-----  -----  ----  ----  ---  ---

Link admin Local advertising Yes No Yes Yes Yes Yes

Local liaison Oper announced Yes No Yes Yes Yes Yes

Oper Remote link Announces no no Yes Yes Yes Yes

Resolution of priority - Yes-

--also was the watchdog, now empty:

SW06 #show power inline gi23

Port power status device status priority class

-------- -------------------- ---------------- ------------ -------- ---------

gi23 research Auto low class0

Limit of power (for the mode of power-limit of port): 15.400W

State of the port: Port is disabled - detection is in progress

Overload counter: 0

Brief of counter: 0

Denied Counter: 0

Missing Counter: 587

Invalid Signature counter: 0

-wap:

SW06 #show power inline gi24

Port power status device status priority class

-------- -------------------- ---------------- ------------ -------- ---------

gi24 - Auto on low class3

Limit of power (for the mode of power-limit of port): 15.400W

State of the port: Port is on - valid resistance detected

Overload counter: 0

Brief of counter: 0

Denied Counter: 0

Missing Counter: 607

Invalid Signature counter: 3

SW06 #show int adv gi24

Port: gi24

Type: 1 G-copper

Link state:

Autonegotiation: enabled

1000F 1000 h 100f 100 h 10 h 10f

-----  -----  ----  ----  ---  ---

Link admin Local advertising Yes No Yes Yes Yes Yes

Local liaison Oper announced Yes No Yes Yes Yes Yes

Oper Remote link Announces no no yes no no no

Resolution of priority - Yes-

Other useful bits:

SW06 active spanning tree #show

Spanning tree disabled mode (floods BPDU) RSTP

By default port cost method: long

SW06 #sh worm

SW version 1.1.2.0 (November 12, 2011 time 23:34:26)

Start the 1.1.0.6 version (date may 11, 2011 time 18:31)

HW version V02

Hi Rich, reference this photo I just drew is a rough interpretation of how a switch 24 ports has guts. Each + block represents a processor. The numbers below represent the port Bank that corresponds to the transformer. Of course, MODULE POE is clearly identified. Each module 12 POE ports for services.

I think you have a completely different question. If the POE works for 5 to 30 minutes, it can be a problem of layer 1 (bad son) or a different, perhaps material condition being disturbed. If the switch is at fault, it seems more likely to be defective to a unit of buggy.  I did a lot of research on the operation of the switch ASIC, transformer and modules of POE in the cohesion.

Quite frankly, I think you should go to the 1.2.7.76 firmware, factory reset the device and test all the ports you want using the same equipment. If maintaining the POE fall every 5 to 30 minutes and you are absolutely positive, that it is not a question of layer 1 or a configuration problem on your products, can I just replace the switch.

-Tom
Please evaluate the useful messages

Tags: Cisco Support

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