UNSOLVED
3548P issue with Cisco phones
Ok, I am trying to work through an issue with my switches and our new Cisco phones. I have 2 3548P's that are stacked with 20 phones off switch one and 12 off switch 2. Switch 2 also has 2 linksys wireless AP's running POE (class 3 devices). We have the 7942G phones (6.3 watts). I am using LLDP-MED to setup a vlan to the phones. I have 3524P's with phones on them without an issue (less phones per switch though).
The problem that I have is when I go to plug in another phone onto either switch. Shortly after plugging in the phone, other phones on either switch will start to reboot randomly. There are 2 things I am thinking, either a LLDP issue (is there a max number of devices that you can have) or a POE issue. The switch is suppose to be able to deliver 24 watts per port to 24 ports before needing the EPS-470 power supply. Am I at some LLDP-MED limit now on the stack? I do have a support case open but does anyone else have any idea's?
i forgot to update this but here is the status as of yet.
-ordered redundant psu for switch and installed (redundant psu increases total POE power the switch can put out). No change.
-disabled CDP on phones. No change.
-disabled LLDP on switch, rebooted all phones. Phones now running on data vlan. Now it works.
-Dell escalated ticket to engineering. Me and the support tech think it is a LLDP issue with the switch (as if the switch doesn't have enough LLDP resources or memory).
my phones always did fully register and show up in CM like they are suppose to. We are running 6.1 if it helps. To me it looks like it is a totally a switch issue. I have not head a peap from engineering so far.
sentinel-master
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Posted July 27th, 2008 13:00
To rule out the potential issue of insufficietn POE power , have you tried removing 5 other phones say and then plugging this new phone in. Just to rule out a hardware or registration fault with your new IP phone plug it in by itself or just a couple of other POE devies....just to narrow down the variables.
Does the IPcphone now register cleanly with Call Manager & get allocated a DN, or does it keep rebooting ?