Mitel system work with Dell 6248P switch

[Terry721]

Hi all,
I'm recently working on Mitel CXII controller with IP Phone 5320e/5360 with Dell PowerConnect 6248P switch.

I've worked with Dell 3524P/3548P and 5224P switch with CXII and 5360 without any problems. But with 6248P, I've had a problem that when IP Phones (both 5320e or 5360) connected to the switch, the phone boot up, upgrade, and suddenly, all 5320e/5360 shutdown. PCs connected to the PC port on the back of the IP Phone can still work without problems, just the IP Phones gone. After I unplug the power and boot the switch again, all phones work.

The case is very trivial, not happens frequently, so it would be hard to test what the problem is. I've talked with Dell guys but seems they don't have any ideas on this issue. Also, I've tried the swap the switch with newly shipped switch from Dell. The problem still happens sometimes.

Anyone have ideas on what caused the problem? Would it be the issue with new phone firmware? Thanks very much!

 

[sarond]

With MCD 5.0 you have to be more aware with VLAN programming. Originally the system was more forgiving with VLANs.
Check this post to see if it helps you.

http://www.tek-tips.com/viewthread.cfm?qid=1677866

How is your network and Mitel configured regarding VLANs?

 

[LoopyLou]

When you say the phones shut down or are "gone" what do you mean? Are the phones totally dead i.e screens blank with no lights showing? If the PC's on the back are working its doesn't sound like the phone is dead rather the phones don't conmplete their boot and are hanging. What is on the phones display?

The only Dell switch I have encountered was a 6248 and we had some weird stuff going on becuase of power and how the Dell handled it. If I remember correctly the default power settings were trying to deliver too much power when the phones booted which caused the Dell to shut down PoE. I would examine the Dell power programming and see if you can set what it delivers to the ports to what the 5320e and 5360's need. Also if there are ports that don't have a phone and therefore don't need PoE manually shut that function off and see what happens.



I'd tell you a UDP joke but I'm afraid you won't get it. TCP jokes are the best because you always get them.

 

[Terry721]

Thanks sarond, I think the problem is not related to the VLAN settings because I had exactly experienced the problem you're talking. But now is all the phone seems turned off. It should be another issue.


Thanks LoopyLou, all phones shutdown means all phone "like" turned off. Nothing shown on the screen, all blinking message waiting indicator are off. And also the switchport are all turned off, then on. But IP Phones didn't comes up.
Nice to heard that you deal with 6248 before. Actually the phones are getting PoE from 0.xx Watts to 12.95 Watts and class 0 detected on switch.
What I can see on the switch CLI and Web GUI are just set the PoE priority, enable/disable and description. Nowhere to force the PoE class or limit the power to deliver. Do you have any ideas on that?


On the network, just simply separate Data and Voice VLAN, firewall and Mitel CXII controller, also with IP Phone x12.
Also there are RPS with the 6248P which norminal power is 676 Watts and consumed power is just 64 Watts.

 

[LoopyLou]

I didn't setup the Dell so I can't help with that. The only thing I can think of is shut PoE off for any ports without a phone.

Will see if I can find whowever set it up and see if he has any ideas. Still sounds like a power issue. Is there a newer version of firmware you could install?

I'd tell you a UDP joke but I'm afraid you won't get it. TCP jokes are the best because you always get them.