AP 2702

[Moudar]

Hi,

I got an AP 2702 with the Giga 1 interface up but protocol down.

I tried shut and no shut, and got the same.

Here is the show interface command:

GigabitEthernet1 is up, line protocol is down
  Hardware is PowerPC Ethernet, address is e865.49d2.c89d (bia e865.49d2.c89d)
  MTU 1500 bytes, BW 1000000 Kbit/sec, DLY 10 usec,
     reliability 255/255, txload 1/255, rxload 1/255
  Encapsulation ARPA, loopback not set
  Keepalive set (10 sec)
  Auto Duplex, Auto Speed, media type is T
  output flow-control is unsupported, input flow-control is unsupported
  ARP type: ARPA, ARP Timeout 04:00:00
  Last input never, output never, output hang never
  Last clearing of "show interface" counters never
  Input queue: 0/42878/0/0 (size/max/drops/flushes); Total output drops: 0
  Queueing strategy: fifo
  Output queue: 0/40 (size/max)
  5 minute input rate 0 bits/sec, 0 packets/sec
  5 minute output rate 0 bits/sec, 0 packets/sec
     0 packets input, 0 bytes, 0 no buffer
     Received 0 broadcasts (0 IP multicasts)
     0 runts, 0 giants, 0 throttles
     0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored
     0 watchdog, 0 multicast, 0 pause input
     0 packets output, 0 bytes, 0 underruns
     0 output errors, 0 collisions, 1 interface resets
     0 unknown protocol drops
     0 babbles, 0 late collision, 0 deferred
     0 lost carrier, 0 no carrier, 0 pause output
     0 output buffer failures, 0 output buffers swapped out

Prime shows the AP like this:

And WLC shows it like this:

Any Ideas?!

[Kasun Bandara]

hi

how you powered the AP? poe? what is the interface status from switch side?

[Moudar]

The AP is powered by a Power Injector (Cisco CB-PWRINJ-NA 15.4W Single-Port PoE Injector)

This is the switch interface:

FastEthernet0/23 is up, line protocol is up (connected)
  Hardware is Fast Ethernet, address is f078.1672.da97 (bia f078.1672.da97)
  Description: AP
  MTU 1500 bytes, BW 100000 Kbit/sec, DLY 100 usec,
     reliability 255/255, txload 4/255, rxload 1/255
  Encapsulation ARPA, loopback not set
  Keepalive set (10 sec)
  Full-duplex, 100Mb/s, media type is 10/100BaseTX
  input flow-control is off, output flow-control is unsupported
  ARP type: ARPA, ARP Timeout 04:00:00
  Last input 00:00:01, output 00:00:00, output hang never
  Last clearing of "show interface" counters never
  Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 13317177
  Queueing strategy: fifo
  Output queue: 0/40 (size/max)
  5 minute input rate 31000 bits/sec, 9 packets/sec
  5 minute output rate 1854000 bits/sec, 173 packets/sec
     183084873 packets input, 95527184469 bytes, 0 no buffer
     Received 1584407 broadcasts (1020301 multicasts)
     0 runts, 0 giants, 0 throttles
     0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored
     0 watchdog, 1020301 multicast, 0 pause input
     0 input packets with dribble condition detected
     527309735 packets output, 338682678488 bytes, 0 underruns
     0 output errors, 0 collisions, 1 interface resets
     0 unknown protocol drops
     0 babbles, 0 late collision, 0 deferred
     0 lost carrier, 0 no carrier, 0 pause output
     0 output buffer failures, 0 output buffers swapped out

[Hans Juergen Guenter]

Hi,

I think that you have not enough POE Power to start the WLAN Interfaces.

[Moudar]

This AP has worked many years, but today it started to show as above.

The Power Injector is enough with 15.4 watts for this AP.

[Kasun Bandara]

share the output of below commands,

in switch >

Sh power-inline

sh run int fa 0/23

[Moudar]

show power inline:

Available:0.0(w)  Used:0.0(w)  Remaining:0.0(w)

Interface Admin  Oper       Power   Device              Class Max
                            (Watts)
--------- ------ ---------- ------- ------------------- ----- ----

sh run int fa 0/23:

interface FastEthernet0/23
 description AP
 switchport access vlan 415
 switchport mode access
end

[Rich R]

https://www.cisco.com/c/en/us/td/docs/wireless/access_point/2700/quick/guide/ap2700getstart.html#pgfId-65865
"Disabled when using 802.3af (15.4W) power."

That's what the documentation says.  If it worked before you were lucky - it wasn't supposed to be according to Cisco.

But let's assume that it was working, as you say, and stopped (this is a crucial piece of info which you should have included in your original post) then the most likely cause is a cable problem.  If you have checked and tested the cable then faulty device (what is connected to that port?) or faulty port on the AP.  Check AP and device RJ45 port contacts.  Also note the docs say: "do not connect the AUX port to the same uplink switch as the AP"

[Moudar]

OK, I thought all the time that giga1 is the 5GHz band and giga 0 is 2,4!!

I checked again on WLC and could not find the 802.11a/n/ac interface!?

Maybe it is faulty AP, i will try to change cables.

[Rich R]

Fair enough - simple mistake.  Gig 0 is the ethernet port.  Gig 1 is the AUX port (second ethernet port).
2.4GHz radio is Dot11Radio0 on the AP and 5GHz radio is Dot11Radio1 on the AP.
The WLC shows the radios as Slot 0 and Slot 1.
So if slot 1 was there and has disappeared then the radio has probably died.  That will show in the AP logs after power on.

Changing cables won't help with the missing radio.  You can try power cycling the AP but most likely your only option is replacing the hardware.  That AP is still covered under Limited Lifetime Hardware Warranty:

https://www.cisco.com/c/en/us/products/collateral/wireless/aironet-2700-series-access-point/eos-eol-notice-c51-740711.html
https://www.cisco.com/c/en/us/products/warranties/warranty-doc-c99-740619.html
https://www.cisco.com/c/en/us/products/warranty-listing.html
https://connectthedots.cisco.com/connectdots/serviceWarrantyFinderRequest?fl=sf#. lookup part number then Warranty tab

[Moudar]

I got this from logs:

*Mar 13 10:20:30.723: %LINEPROTO-5-UPDOWN: Line protocol on Interface BVI1, changed state to up
*Mar 13 10:20:30.723: %LINK-6-UPDOWN: Interface Dot11Radio0, changed state to up
*Mar 13 10:20:30.723: %SSH-5-ENABLED: SSH 2.0 has been enabled
*Mar 13 10:20:32.067: %LINEPROTO-5-UPDOWN: Line protocol on Interface Dot11Radio0, changed state to down
*Mar 13 10:20:32.071: %DOT11-5-EXPECTED_RADIO_RESET: Restarting Radio interface Dot11Radio0 due to the reason code 10set_radio_pwr_mode: bad radio unit# 1

I think this log as you said indicates a faulty AP?! Should i do RMA this unit or it is too old to do that? Is there anything that can be done to fix it?

[Rich R · Accepted solution]

Yes that confirms failed hardware on 5GHz radio.

The AP hardware is still supported.  If you have it on contract - RMA as normal via TAC.  If you don't have it on contract then read the warranty info I provided above - can still be RMA but just takes longer and you have to follow the warranty process.  You must send in the faulty AP (after raising RMA) and then they will send the  replacement within 10 days of receiving the faulty part.