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New Member

C891 & PoE (800-IL-PM-4) not working...

Ok so I have the following model:

CISCO891W-AGN-A-K9

Software version: 15.3(3)M

I just installed the PoE daugter card (800-IL-PM-4), which according to the 890 Q&A is field-upgradeable.

I've followed the basic instructions, installing the module in the router and connecting the additional power-supply.

The module is show in "show inventory"

#sh inv

NAME: "891", DESCR: "891 chassis, Hw Serial#: X, Hw Revision: 1.0"

PID: CISCO891W-AGN-A-K9, VID: V03, SN: X

NAME: "ESW Power Daughter Card", DESCR: "4-Port ESW Power Daughter Card"

PID: 800-IL-PM-4       , VID: V04, SN: X


Here's where I'm stuck at.

I have no option in the IOS to do any of the PoE-related show or configuration commands.

exec-mode "show power inline" doesn't exist.

interface-mode "power inline {...}" doesn't exist.

#show po?

policy-firewall  policy-manager  policy-map


And (obviosuly) the poe doesn't work...

I've gone through the Cisco guides I've on this subject, an all they mention is the hardware installation (how to screw it in) and then using these commands.

I'm pretty sure I've missed out some fundamental or basic thing here...

Any thoughts?

Everyone's tags (1)
1 ACCEPTED SOLUTION

Accepted Solutions
Hall of Fame Super Gold

C891 & PoE (800-IL-PM-4) not working...

I just installed the PoE daugter card (800-IL-PM-4), which according to the 890 Q&A is field-upgradeable.

Did you plug in the SECOND power supply?

If not, this is your answer.


If you did, which power up sequence did you do?

Did you power up the PoE FIRST and then the router?

9 REPLIES
Hall of Fame Super Gold

C891 & PoE (800-IL-PM-4) not working...

I just installed the PoE daugter card (800-IL-PM-4), which according to the 890 Q&A is field-upgradeable.

Did you plug in the SECOND power supply?

If not, this is your answer.


If you did, which power up sequence did you do?

Did you power up the PoE FIRST and then the router?

New Member

Re: C891 & PoE (800-IL-PM-4) not working...

I did plug in the second power supply, however I did connect it after I plugged the router back in.

So after I rebooted the router (with both PS connected) the power started to work fine.

Thanks for your help.

I am however experiencing a very strange issue after the reboot, GigabitEthernet0 is no longer working correctly.

The logs say that it comes up, but it really doesn't.

%LINK-3-UPDOWN: Interface GigabitEthernet0, changed state to up

%LINEPROTO-5-UPDOWN: Line protocol on Interface GigabitEthernet0, changed state to up

# sh ip int brief | i Giga

GigabitEthernet0           192.168.1.253   YES NVRAM  up                    down   

#sh int g0

GigabitEthernet0 is up, line protocol is down

The funny thing is though, is that the router is actually sending out packets to the interface, but everything that relies on the interface being up doesn't work.

I've tried new cable, connecting to a different device, rebooting, disconnecting the second ps, no luck.

Maybe it's not related and just a bad timing, either way, it's now nonfunctional at the moment. :/

Hall of Fame Super Gold

C891 & PoE (800-IL-PM-4) not working...

Post the output to the command "sh interface G0".

New Member

Re: C891 & PoE (800-IL-PM-4) not working...

beinir-natti#sh int g0

GigabitEthernet0 is up, line protocol is down

  Hardware is PQII_PRO_UEC, address is bc16.657d.299b (bia bc16.657d.299b)

  Internet address is 192.168.1.253/24

  MTU 1500 bytes, BW 100000 Kbit/sec, DLY 100 usec,

     reliability 255/255, txload 1/255, rxload 1/255

  Encapsulation 802.1Q Virtual LAN, Vlan ID  1., loopback not set

  Keepalive set (10 sec)

  Full Duplex, 100Mbps, media type is RJ45

  output flow-control is XON, input flow-control is XON

  ARP type: ARPA, ARP Timeout 04:00:00

  Last input 00:00:27, 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: 0

  Queueing strategy: fifo

  Output queue: 0/40 (size/max)

  30 second input rate 0 bits/sec, 0 packets/sec

  30 second 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

     15 packets output, 932 bytes, 0 underruns

     0 output errors, 0 collisions, 2 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

Hall of Fame Super Gold

C891 & PoE (800-IL-PM-4) not working...

GigabitEthernet0 is up, line protocol is down

Means Layer 1 is OK but Layer 2 (an onwards) isn't.

This is a configuration issue.  What are you trying to do?

New Member

Re: C891 & PoE (800-IL-PM-4) not working...

Well this interface, and this particular connection, was working before the reboot.

GigabitEthernet0 is connected to a DSL modem, it has two subinterfaces as well.

The main interface "just" GigabitEthernet0 is to get admin access to the DSL modem.

Both subinterfaces are configured with dot1q encapsulation, one of them is running a PPPoE client and the other is just bridging.

There was no configuration change.

And liked I've said, I've tried to change cables and connect the interface directly to my laptop, still the same.

Besides, it's kind of strange that the router sends the syslog message that line protocol is up....

EDIT:

I just did a "write erase", and now the interface works.

going to see if I can reconfigure the box and if it still works....

New Member

Re: C891 & PoE (800-IL-PM-4) not working...

Update:

Everything's working... for some reason

So, I did a "wr erase" followed by a "reload".

(I copied the startup-config to a file on the flash before.)

Gig0 worked fine when the router came back online.

I proceeded to copy the saved-file to "running-config", and then Gig0 stopped working again.

After a few tests, I rebooted the router again and got it up with empty config.

I then manually copied almost* all lines from the saved config to the router, connectivity has been restored and everything works fine.

*almost = I did use the chance to do some cleaning, but the config I skipped was mostly crypto related, and nothing that I could connect to these issues.

I saved the config, and reloaded the router again (just to be sure), and everything still works.

@Leo, thanks very much for your help

Hall of Fame Super Gold

C891 & PoE (800-IL-PM-4) not working...

Wait a second ...

I think I've seen this before.

When I have an 8801W router and my Gi0 interface goes to my ISP.  When I issue the reboot command, the interface would stay up/down.  You can wait for 30 minutes and the status won't change.  I have to issue the command "clear interface G0" and the interface would go up.

I upgraded the IOS and everything worked normally.

Have you tried that too?

Hall of Fame Super Gold

C891 & PoE (800-IL-PM-4) not working...

Contact the TAC.

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