AP 3825i on Cisco 3560 Switch

[Juergen_Greza]

I have the folowing problem:
An AP 3825i (V9.21.02) ist connected witch a LACP Port Channel on a Cisco 3560 Switch
After Switch reboot the AP is not coming up, because the POE recognition is faulty. On the Switch I see no POE Device.

When I disable one of the swichport, the AP becomes a POE Power immediately. When the AP is up and I enabe the second Port the LACP Channel goes up an everything is o.k.

It is always no problem when I disable the POE on one Port of the Channel.

Is anyone aware of the problem ?

here the config of the switch :

interface FastEthernet0/2
description AP-test
switchport mode access
channel-group 20 mode active
spanning-tree portfast

interface FastEthernet0/4
switchport mode access
channel-group 20 mode active
spanning-tree portfast

interface Port-channel20
description AP-test
switchport mode access

After Switch reboot:

Switch#show power inline
Available:370.0(w) Used:0.0(w) Remaining:370.0(w)

Interface Admin Oper Power Device Class Max
(Watts)
--------- ------ ---------- ------- ------------------- ----- ----
Fa0/1 auto off 0.0 n/a n/a 15.4
Fa0/2 auto off 0.0 n/a n/a 15.4
Fa0/3 auto off 0.0 n/a n/a 15.4
Fa0/4 auto off 0.0 n/a n/a 15.4

after Disable/enabe fa/0/4

00:11:00: %ILPOWER-7-DETECT: Interface Fa0/2: Power Device detected: IEEE PD
00:11:05: %LINK-3-UPDOWN: Interface FastEthernet0/4, changed state to up
00:11:05: %LINK-3-UPDOWN: Interface FastEthernet0/2, changed state to up
00:11:12: %LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/4, changed state to up
00:11:13: %LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/2, changed sFa0/20 auto off 0.0 n/a n/a 15.4

Switch#
00:11:23: %LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/4, changed state to down
00:11:23: %LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/2, changed state to down
00:11:24: %LINK-3-UPDOWN: Interface FastEthernet0/4, changed state to down
00:11:24: %LINK-3-UPDOWN: Interface FastEthernet0/2, changed state to down
00:11:26: %LINK-3-UPDOWN: Interface FastEthernet0/4, changed state to up
00:11:26: %LINK-3-UPDOWN: Interface FastEthernet0/2, changed state to up
Switch#
00:11:35: %LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/2, changed state to up
00:11:35: %LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/4, changed state to up



Switch#show power inline
Available:370.0(w) Used:15.4(w) Remaining:354.6(w)

Interface Admin Oper Power Device Class Max
(Watts)
--------- ------ ---------- ------- ------------------- ----- ----
Fa0/1 auto off 0.0 n/a n/a 15.4
Fa0/2 auto on 15.4 Ieee PD 4 15.4
Fa0/3 auto off 0.0 n/a n/a 15.4
Fa0/4 auto off 0.0 n/a n/a 15.4

Switch#show lacp counters
LACPDUs Marker Marker Response LACPDUs
Port Sent Recv Sent Recv Sent Recv Pkts Err
---------------------------------------------------------------------
Channel group: 20
Fa0/2 167 7 0 0 0 0 0
Fa0/4 168 8 0 0 0 0 0

Switch#show lacp int
Switch#show lacp internal
Flags: S - Device is requesting Slow LACPDUs
F - Device is requesting Fast LACPDUs
A - Device is in Active mode P - Device is in Passive mode

Channel group 20
LACP port Admin Oper Port Port
Port Flags State Priority Key Key Number State
Fa0/2 SA bndl 32768 0x14 0x14 0x4 0x3D
Fa0/4 SA bndl 32768 0x14 0x14 0x6 0x3D
Switch#show lacp neigh
Switch#show lacp neighbor
Flags: S - Device is requesting Slow LACPDUs
F - Device is requesting Fast LACPDUs
A - Device is in Active mode P - Device is in Passive mode

Channel group 20 neighbors

Partner's information:

LACP port Oper Port Port
Port Flags Priority Dev ID Age Key Number State
Fa0/2 FA 255 d884.6630.450a 22s 0x9 0x1 0x3F
Fa0/4 FA 255 d884.6630.450a 22s 0x9 0x2 0x3F
Switch#show lacp sys
Switch#show lacp sys-id
32768, 001a.6d6f.5080
Switch#

[Doug]

I would suggest trying the static lag route first, please let us know if that does not work. I would also suggest opening a ticket with GTAC for further review.

[Joseph_Burnswor]

Have you tried turning off CDP on those switch ports?

Also, have you tried a static LAG to the AP?