[cisco-voip] Cisco IP phone and infinite DHCP lease

[Anthony Kouloglou]

The problem on those ATAs is that there are no users but emergency 
analog devices attached on them :-(.
I have tested in my lab with a 7941.
Even with an infinite lease, when i reseted it remotely, it got a new ip 
from another dhcp server.
But ATAs is another case.
I will try to find one for a test.

Regards
Anthony

On 13-Oct-11 14:19, Stephen Welsh wrote:
> Hi Anthony,
>
> You can always ask your users to do it, or local IT focal points if 
> you have them, assuming you are changing away from a infinite DHCP 
> setting, you would only have to do this once I'd expect.
>
> I'm afraid I haven't used the ATA's in quite a while, so I'm a bit 
> rusty, but I believe you could change the ATA from DHCP to static 
> (keeping the same address?), apply and then swap back to DHCP again. 
> The details on the ATA web interface are here:
>
> http://www.cisco.com/en/US/products/hw/gatecont/ps514/products_configuration_example09186a00800c3a50.shtml#task4
>
> Obviously you need to test this as you don't want to make the 
> situation worse by having ATA's you need to manually factory reset :(
>
> Also,
> It is possible to remotely control multiple phones at once for this 
> type of problem, we released an application called PhoneView at the 
> beginning of the year that's 100% focused on managing phone endpoints, 
> on the basis you never need to physically touch a phone again (as long 
> as it's registered with UCM, SRST or CME).
>
> I suggest you have a look at the video(s) on the website to see how it 
> works (http://www.unifiedfx.com), in addition for key press macros 
> there is a video with a good example on this, in this case for the 
> bulk delete of ITL file from multiple phones here: 
> http://www.youtube.com/watch?v=f7oPuj1szNg
>
> Note: There are some really ground breaking enhancements in PhoneView 
> Version 2 that will be released on in a few weeks that no other remote 
> control based product can do, it might be worth your while registering 
> for the Webinar: (http://events.unifiedfx.com)
>
> Thanks
>
> Stephen
>
> On 13 Oct 2011, at 07:24, Anthony Kouloglou wrote:
>
>> Hi Stephen,
>> the problem is that i don't want to go to every phone and press that 
>> sequence.
>> How is it possible to do it remotely? (with that for example? 
>> http://www.voipintegration.com/Software-Phone-Remote.aspx)
>> As far as the ATAs, what you thing would be enough to do via the webgui?
>>
>> Regards
>> Anthony
>>
>> On 12-Oct-11 18:51, Stephen Welsh wrote:
>>> Interesting problem,
>>> I wasn't aware of many people setting an infinite DHCP lease, I 
>>> assume this is to prevent from the impact of a loss of DHCP server?
>>>
>>> I suspect if you go to the phone settings and erase the phones 
>>> config that will force the phone to re-aquire an IP Address?
>>>
>>> If that worked it would give you the option of using a key press 
>>> macro and sending the key sequence to the phones remotely, or asking 
>>> users to perform the sequence for you.
>>>
>>> This would only apply to the normal IP Phones, the ATA's would need 
>>> to be done separately, possibly web browse into each one?
>>>
>>> Thanks
>>>
>>> Stephen
>>>
>>> On 12 Oct 2011, at 15:34, Anthony Kouloglou wrote:
>>>
>>>> Hi Scott,
>>>> if all we need is shut no shut it is bearable.
>>>> What is not bearable is unplug and replug (all devices are non poe) 
>>>> of their powercube :-(
>>>>
>>>> Regards
>>>> Anthony
>>>>
>>>>
>>>> On 12-Oct-11 17:30, Scott Voll wrote:
>>>>> it's been too long ago for me to be sure.... but I think when we 
>>>>> moved to new CM hardware and changed IP's this is what we 
>>>>> did...... BUT I think I did a shut no shut on the switches.
>>>>>
>>>>> Scott
>>>>>
>>>>> On Wed, Oct 12, 2011 at 6:56 AM, Anthony Kouloglou 
>>>>> <akoul at dataways.gr <mailto:akoul at dataways.gr>> wrote:
>>>>>
>>>>>     Hi all,
>>>>>     suppose a ip phones (79XX, ATA186, ATA187, 69XX) are
>>>>>     registered to a CUCM and the dhcp has assigned them an
>>>>>     infinite IP.
>>>>>     If i disable this dhcp and set up a new one with different
>>>>>     lease time (a day for example), will the ip phones get the new
>>>>>     settings after i reset them from the CCM admin?
>>>>>
>>>>>     Regards
>>>>>     Anthony
>>>>>
>>>>>
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