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gs510tpp ports losing connection to network
I have a strange problem. Had a bunch of RUKUS R510 ap's connected to the poe switch for over 5 weeks on a bench, all working fine, devices connecting to the ap's and network with internet access. Th...
Hi Mate
Thanks for your advice. You are right , I could change the setting in CST port configuration to disable the settings. But would not fix the real problem on the network with the flooding of the BPDU packets. I checked the switches. all flashing like mad. Started foot patrol on the network to all the office and asking questions. A bright staff member found a cable and decided to plug it into the network and created a loopback between two points.
This slowed down the whole network, internet access on the network was at snails pace and put the 3 Netgear POE switches on the uplink ports to D-Disable.
So everyone could connect to the Ap's but no traffic to anywhere.. I just had all the new cables fitted to 26 rooms for the Rukus AP's back to new patch panels, then put the POE switches in and everything was sweet and fine for 2 days. Well, until yesterday afternoon.
I have it all sorted now and all the switches and AP's back up and running.
I could disable the settings as you suggested, but I think I will leave it. It will tell me if anyone else has created a loopback, not that I want it.
Thank you very much for your advice, It was very helpful and pointed me in the right direction. You Are a star.. and well appreciated.
Just to say. When the port becomes disabled. it is only that port that becomes disabled. The rest of the ports are still working and the poe ap's are still connected. When I move the uplink to another port on the poe switch it disables it. The patch cables are fine and the rest of the comms switches are fine. It's just the poe switches that are behaving this way.
Hi sparky2020
Those uplinks ports - are they connected to other switches that can do PoE? In that case, this could be the issue. Can you try and disable PoE on the uplink ports?
System > PoE > Advanced > PoE Port Configuration > Disable PoE "Admin Mode" on the uplink port.
It could also be spanning tree related, but try turning off PoE on the uplink ports first.
Cheers!
- Hi. I turned off power on the poe port. Connected it back to the network. Same problem. Port goes red in device view and d-disabled. Its strange because everything was working fine before. Theres been no network changes anywhere else on the network . Thanks for your help
Hi again,
The D-Disabled status is spanning tree related. It happens if a port receives more than 15 BPDUs over 3 seconds. It is a "defence" mechanism to protect the switch against BPDU flooding. You really should look into why the existing network sends so many BPDUs.
Are these switches part of a loop topology? If not, try and turn STP off on the uplink port which should prevent the D-Disable state. NOTE: If you do this and there is a loop topology, the network will go down as you loop it. So, be prepared to disconnect the switch immediately if needed.
From GUI: Switching > STP > Advanced > CST Port Configuration > Set "STP Status" to Disable on the uplink port > click "Apply". Reboot the switch.
But again, that is treating the symptom rather than the cause.
ThanksDone a firmware update to ver 6.6.2.8. still same problem. The ports on the POE switch are supposed to autonegotiate and should sense that whether they are connected to a poe device or another network switch. I have removed the switch from the network and is on a bench just connected to a laptop and no other devices. as soon as i connect it to the networkthe port goes down d-disabled.
Hi sparky2020,
This is not a bug :)
So, it is not a question of whether "firmware X" has a solution (we will of course always recommend to use the latest firmware). Did you do as suggested in my previous post? It is not PoE related as I initially thought it might have been. It is STP related.
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