Dahua IPC-HDBW7842H-Z - Drawing POE power, but network link not coming online - 60m cable?

[victorhooi]

I have a Dahua IPC-HDBW7842H-Z camera, running the latest firmware (DH_IPC-HX8XXX-Nobel_MultiLang_PN_V3.000.0000000.2.R.210712).

I've connected this to a POE switch - the cable length is approximately 60 metres.

However, on the switch side - the camera is drawing power (approximately 5 watts) - however, the network link is not coming up. The device is plugged into port 3 on the switch:

ICX7150-C10ZP Switch>show poe   

Power Capacity:         Total is 240000 mWatts. Current Free is 210000 mWatts.

Power Allocations:      Requests Honored 11 times


 Port   Admin   Oper    ---Power(mWatts)---  PD Type  PD Class  Pri  Fault/
        State   State   Consumed  Allocated                          Error
--------------------------------------------------------------------------
  1/1/1 On      Non-PD         0          0  n/a      n/a         3  n/a
  1/1/2 On      Off            0          0  n/a      n/a         3  n/a
  1/1/3 On      On          6100      30000  802.3at  Class 4     3  n/a
  1/1/4 On      Off            0          0  n/a      n/a         3  n/a
  1/1/5 On      Non-PD         0          0  n/a      n/a         3  n/a
  1/1/6 On      Off            0          0  n/a      n/a         3  n/a
  1/1/7 On      Off            0          0  n/a      n/a         3  n/a
  1/1/8 On      Off            0          0  n/a      n/a         3  n/a
  1/2/1 On      Off            0          0  n/a      n/a         3  n/a
  1/2/2 On      Off            0          0  n/a      n/a         3  n/a
--------------------------------------------------------------------------

ICX7150-C10ZP Switch>show interfaces briefTFTP session timed out


Port       Link    State   Dupl Speed Trunk Tag Pvid Pri MAC             Name
1/1/1      Up      Forward Full 1G    None  No  1    0   d4c1.9e9c.0532                 
1/1/2      Down    None    None None  None  No  1    0   d4c1.9e9c.0533                 
1/1/3      Down    None    None None  None  No  1    0   d4c1.9e9c.0534                 
1/1/4      Down    None    None None  None  No  1    0   d4c1.9e9c.0535                 
1/1/5      Up      Forward Full 1G    None  No  1    0   d4c1.9e9c.0536                 
1/1/6      Down    None    None None  None  No  1    0   d4c1.9e9c.0537                 
1/1/7      Down    None    None None  None  No  1    0   d4c1.9e9c.0538                 
1/1/8      Down    None    None None  None  No  1    0   d4c1.9e9c.0539                 
1/2/1      Down    None    None None  None  No  1    0   d4c1.9e9c.053b                 
1/2/2      Down    None    None None  None  No  1    0   d4c1.9e9c.053c                 
1/3/1      Down    None    None None  None  No  1    0   d4c1.9e9c.053d                 
1/3/2      Down    None    None None  None  No  1    0   d4c1.9e9c.053e                 
mgmt1      Down    None    None None  None  No  None 0   d4c1.9e9c.0532

Previously, this was working with a short patch lead (< 2m) connected directly to the switch.

Does anybody know what might be going on?

 

[redfive]

Did you test the cable, with a different device, like a laptop ?

 

[victorhooi]

Yup, I unplugged the camera, and plugged that cable into a network tester - it does draw POE, and also gets an IP address etc.:


The Dahua camera seems to draw POE - and I even see the red LEDs come on (it's night-time as I'm testing it) - however, the switch port LED doesn't come on, and the camera isn't accessible.

 

[SouthernYankee]

Test the camera with a short (2 meters) premade store purchased cable. If the camera and network work than you have a bad 60 M cable. Or the cable is running near some other power cables.

Is the cable CCA (copper covered Aluminum) or is it pure copper. It must be a pure copper cable.

If the cable is home made it must match the standard.

 

[looney2ns]

Did you use Solid Copper cable of 23awg or 24awg wire size.
Did you correctly crimp good quailty rj 45s to the cable.
Are they crimped correctly to standard?
Are you using a good POE switch with a straight uninterrupted cable run from the switch to the cam? No keystones or patch panels used?
Cable is at least 12" away from any AC power lines or fluorescent lights?
Have you cut off, and recrimped new RJ45 to check?

 

[flynreelow]

Did you use Solid Copper cable of 23awg or 24awg wire size.
Did you correctly crimp good quailty rj 45s to the cable.
Are they crimped correctly to standard?
Are you using a good POE switch with a straight uninterrupted cable run from the switch to the cam? No keystones or patch panels used?
Cable is at least 12" away from any AC power lines or fluorescent lights?
Have you cut off, and recrimped new RJ45 to check?

POE cat6 can still go through a proper keystone

 

[looney2ns]

POE cat6 can still go through a proper keystone

But we've had several cases on here lately that we solved by asking questions about keystone jacks and some of them had one two or three in the line and maybe a patch panel to boot. And that was the problem, too many points of resistance.

And you're assuming that everybody uses a good quality keystone jack, instead of the reality that the cheapest they can find on the net. And that they know how to properly punch them down.

 

[flynreelow]

But we've had several cases on here lately that we solved by asking questions about keystone jacks and some of them had one two or three in the line and maybe a patch panel to boot. And that was the problem, too many points of resistance.

And you're assuming that everybody uses a good quality keystone jack, instead of the cheapest they can find on the net.

yea, i use a monoprice cat6 keystone with no issues. but i get it... im sure there are some bad ones in the bunch.

 

[victorhooi]

Thanks everybody for their suggestions!

I was able to resolve this - turns out the RJ45 plug end must have not been punched down correctly - there was a short across some of the pins:



I had previously tested this with a different tester - however, the mode on that was not set correctly (channel mode, and we were patch-cord adapters), so I assume it didn't pick up the short.

I guess for some reason, the short was enough for the camera to power on via POE, but not enough to actually bring up the link...aha.

Thanks again to all for their help!