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Webcast-Catalyst9k
New Member

3560 PoE problem

Hello Everyone,

I have a 3560 switch 48-PS, and i need plug two IP phones 7911.
But do not get the power in the ports, and the phones do not start.

Show power inline command:

Available:370.0(w)  Used:85.9(w)  Remaining:284.1(w)

Interface Admin  Oper       Power   Device              Class Max
                            (Watts)
--------- ------ ---------- ------- ------------------- ----- ----
Gi0/1     auto   off        0.0     n/a                 n/a   15.4
Gi0/2     auto   off        0.0     n/a                 n/a   15.4
Gi0/3     auto   off        0.0     n/a                 n/a   15.4
Gi0/4     auto   off        0.0     n/a                 n/a   15.4
Gi0/5     auto   off        0.0     n/a                 n/a   15.4
Gi0/6     auto   off        0.0     n/a                 n/a   15.4
Gi0/7     auto   off        0.0     n/a                 n/a   15.4
Gi0/8     auto   off        0.0     n/a                 n/a   15.4
Gi0/9     auto   off        0.0     n/a                 n/a   15.4
Gi0/10    auto   off        0.0     n/a                 n/a   15.4
Gi0/11    auto   off        0.0     n/a                 n/a   15.4
Gi0/12    auto   off        0.0     n/a                 n/a   15.4
Gi0/13    auto   off        0.0     n/a                 n/a   15.4
Gi0/14    auto   off        0.0     n/a                 n/a   15.4
Gi0/15    auto   off        0.0     n/a                 n/a   15.4
Gi0/16    auto   off        0.0     n/a                 n/a   15.4
Gi0/17    auto   off        0.0     n/a                 n/a   15.4
Gi0/18    auto   off        0.0     n/a                 n/a   15.4
Gi0/19    auto   off        0.0     n/a                 n/a   15.4
Interface Admin  Oper       Power   Device              Class Max
                            (Watts)
--------- ------ ---------- ------- ------------------- ----- ----
Gi0/20    auto   off        0.0     n/a                 n/a   15.4
Gi0/21    auto   off        0.0     n/a                 n/a   15.4
Gi0/22    auto   off        0.0     n/a                 n/a   15.4
Gi0/23    auto   off        0.0     n/a                 n/a   15.4
Gi0/24    auto   off        0.0     n/a                 n/a   15.4
Gi0/25    auto   off        0.0     n/a                 n/a   15.4
Gi0/26    auto   off        0.0     n/a                 n/a   15.4
Gi0/27    auto   off        0.0     n/a                 n/a   15.4
Gi0/28    auto   off        0.0     n/a                 n/a   15.4
Gi0/29    auto   off        0.0     n/a                 n/a   15.4
Gi0/30    auto   off        0.0     n/a                 n/a   15.4
Gi0/31    auto   off        0.0     n/a                 n/a   15.4
Gi0/32    auto   off        0.0     n/a                 n/a   15.4
Gi0/33    auto   off        0.0     n/a                 n/a   15.4
Gi0/34    auto   on         6.3     IP Phone 7960       n/a   15.4
Gi0/35    auto   off        0.0     n/a                 n/a   15.4
Gi0/36    auto   off        0.0     n/a                 n/a   15.4
Gi0/37    auto   off        0.0     n/a                 n/a   15.4
Gi0/38    auto   off        0.0     n/a                 n/a   15.4
Gi0/39    auto   off        0.0     n/a                 n/a   15.4
Gi0/40    auto   off        0.0     n/a                 n/a   15.4
Gi0/41    auto   off        0.0     n/a                 n/a   15.4
Interface Admin  Oper       Power   Device              Class Max
                            (Watts)
--------- ------ ---------- ------- ------------------- ----- ----
Gi0/42    auto   on         12.2    AIR-LAP1131AG-T-K9  n/a   15.4
Gi0/43    auto   off        0.0     n/a                 n/a   15.4
Gi0/44    auto   on         12.2    AIR-LAP1131AG-T-K9  n/a   15.4
Gi0/45    auto   on         12.2    AIR-LAP1131AG-T-K9  n/a   15.4
Gi0/46    auto   on         12.2    AIR-LAP1131AG-T-K9  n/a   15.4
Gi0/47    auto   on         15.4    Ieee PD             3     15.4
Gi0/48    auto   on         15.4    Ieee PD             3     15.4

Can I be having a problem of variation in the grid?
How to check this for commands on the switches?

Tks a lot.

Rafael Mendes

9 REPLIES
Hall of Fame Super Blue

Re: 3560 PoE problem

Rafael

You may get a better response if you post into the VOIP forums. However can you check that you have this under the interfaces -

int gi0/1

power inline auto

Jon

New Member

Re: 3560 PoE problem

Hi Jon,

Tks for response.

Well, the problem occurs in all PoE ports, and all kind of equipments. For example (Ip Phones, AP's, etc).

In all other switches configured in the network, i don't need include this command "power inline auto".

Is there any command to check grid "power domain" and fan?

Tks.

Hall of Fame Super Gold

Re: 3560 PoE problem

Is CDP enabled on the ports?  Can you post the interface config for the ports having a problem and compare them with ports that are working?

New Member

Re: 3560 PoE problem

Yes, CDP is enabled.

All ports have the same configuration(working and not working):

interface GigabitEthernet0/5
switchport mode access
switchport voice vlan X
dot1x mac-auth-bypass eap
dot1x pae authenticator
dot1x port-control auto
dot1x violation-mode protect
dot1x timeout tx-period X
spanning-tree portfast

I  still have the impression that there is a problem in the electrical  network, most do not know verify this with the switch command line.

New Member

Re: 3560 PoE problem

Anyone can help me?

Tks

Hall of Fame Super Gold

Re: 3560 PoE problem

I  still have the impression that there is a problem in the electrical  network, most do not know verify this with the switch command line.

Sure, you can test for TDR.  (NOTE:  TDR is not supported in all 3560/3750 switches.)

The commands are:

1.  "test cable tdr interface ";

2.  Wait for about 10-15 seconds;

3.  "sh cable  cable tdr interface "

The command, depending on IOS version, should not be disruptive.  Post the output if you have any doubts.

New Member

Re: 3560 PoE problem

Not working POE port

Interface Speed Local pair Pair length        Remote pair Pair status
--------- ----- ---------- ------------------ ----------- --------------------
Gi0/25    1000M Pair A     27   +/- 4  meters Pair A      Normal
                Pair B     28   +/- 4  meters Pair B      Normal
                Pair C     28   +/- 4  meters Pair C      Normal
                Pair D     27   +/- 4  meters Pair D      Normal

Working POE port

Interface Speed Local pair Pair length        Remote pair Pair status
--------- ----- ---------- ------------------ ----------- -------------
Gi0/29    1000M Pair A     19   +/- 4  meters Pair A      Normal
                Pair B     19   +/- 4  meters Pair B      Normal
                Pair C     16   +/- 4  meters Pair C      Normal
                Pair D     20   +/- 4  meters Pair D      Normal

I am also having same issues in some port or some times

Any help or Bug in the IOS version

C3560 Software (C3560-IPBASE-M), Version 12.2(50)SE1,

thanks

Hall of Fame Super Gold

Re: 3560 PoE problem

This is not the same as the beginning of this thread. 

Can you please post the result of the "sh power inline" please?  What are you trying to power up?

New Member

Re: 3560 PoE problem

Available:370.0(w)  Used:207.4(w)  Remaining:162.6(w)

Interface Admin  Oper       Power   Device              Class Max
                            (Watts)
--------- ------ ---------- ------- ------------------- ----- ----
Gi0/1     auto   on         15.4    AIR-LAP1252AG-E-K9  3     15.4
Gi0/2     auto   off        0.0     n/a                 n/a   15.4
Gi0/3     auto   off        0.0     n/a                 n/a   15.4
Gi0/4     auto   on         12.0    IP Phone 7945       3     15.4
Gi0/5     auto   off        0.0     n/a                 n/a   15.4
Gi0/6     auto   off        0.0     n/a                 n/a   15.4
Gi0/7     auto   off        0.0     n/a                 n/a   15.4
Gi0/8     auto   on         12.0    IP Phone 7945       3     15.4
Gi0/9     auto   off        0.0     n/a                 n/a   15.4
Gi0/10    auto   off        0.0     n/a                 n/a   15.4
Gi0/11    auto   off        0.0     n/a                 n/a   15.4
Gi0/12    auto   on         12.0    IP Phone 7945       3     15.4
Gi0/13    auto   on         12.0    IP Phone 7945       3     15.4
Gi0/14    auto   off        0.0     n/a                 n/a   15.4
Gi0/15    auto   on         12.0    IP Phone 7945       3     15.4
Gi0/16    auto   off        0.0     n/a                 n/a   15.4
Gi0/17    auto   on         12.0    IP Phone 7945       3     15.4
Gi0/18    auto   off        0.0     n/a                 n/a   15.4
Gi0/19    auto   off        0.0     n/a                 n/a   15.4
Gi0/20    auto   on         12.0    IP Phone 7945       3     15.4
Interface Admin  Oper       Power   Device              Class Max
                            (Watts)
--------- ------ ---------- ------- ------------------- ----- ----
Gi0/21    auto   on         12.0    IP Phone 7945       3     15.4
Gi0/22    auto   off        0.0     n/a                 n/a   15.4
Gi0/23    auto   off        0.0     n/a                 n/a   15.4
Gi0/24    auto   on         12.0    IP Phone 7945       3     15.4
Gi0/25    auto   off        0.0     n/a                 n/a   15.4
Gi0/26    auto   off        0.0     n/a                 n/a   15.4
Gi0/27    auto   off        0.0     n/a                 n/a   15.4
Gi0/28    auto   off        0.0     n/a                 n/a   15.4
Gi0/29    auto   on         12.0    IP Phone 7965       3     15.4
Gi0/30    auto   off        0.0     n/a                 n/a   15.4
Gi0/31    auto   off        0.0     n/a                 n/a   15.4
Gi0/32    auto   off        0.0     n/a                 n/a   15.4
Gi0/33    auto   off        0.0     n/a                 n/a   15.4
Gi0/34    auto   on         12.0    IP Phone 7945       3     15.4
Gi0/35    auto   off        0.0     n/a                 n/a   15.4
Gi0/36    auto   off        0.0     n/a                 n/a   15.4
Gi0/37    auto   off        0.0     n/a                 n/a   15.4
Gi0/38    auto   off        0.0     n/a                 n/a   15.4
Gi0/39    auto   off        0.0     n/a                 n/a   15.4
Gi0/40    auto   off        0.0     n/a                 n/a   15.4
Gi0/41    auto   off        0.0     n/a                 n/a   15.4
Gi0/42    auto   on         12.0    IP Phone 7945       3     15.4
Gi0/43    auto   on         12.0    IP Phone 7945       3     15.4
Interface Admin  Oper       Power   Device              Class Max
                            (Watts)
--------- ------ ---------- ------- ------------------- ----- ----
Gi0/44    auto   on         12.0    IP Phone 7945       3     15.4
Gi0/45    auto   on         12.0    IP Phone 7965       3     15.4
Gi0/46    auto   on         12.0    IP Phone 7945       3     15.4
Gi0/47    auto   off        0.0     n/a                 n/a   15.4
Gi0/48    auto   off        0.0     n/a                 n/a   15.4


all the ports are same confgiuration some things power is coming up after rebooting like that another one

all CP79XX IP phone means 12.0 watts

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