IP Phone and DHCP Timeout 1

[DBrewsky]

Had a customer call and said his phone conversation was disconnected and the IP Phone said the DHCP Lease has expired. Then the phone rebooted.

Note: The phone is registering to the customers DHCP server and not the internal server of the IP Office.

Now I have worked on a LOT of Nortel BCMs with IP Phones and have never seen this.

Ideas, thoughts??



Thanks again!

--DB

http://support.csctech.us

Remote Support Specialist

 

[CarGoSki]

Nortels were insulated from tcp?

 

[Bas1234]

Change the 8 day lease (mostly default), to 365 days or anything higher then 8 days.

___________________________________________
It works! Now if only I could remember what I did...

Dain Bramaged
___________________________________________

 

[DBrewsky]

UPDATE!!

I went ahead and programmed my Winders 2008 Server with a DHCP scope and set the lease timer to 120 seconds. With that I found the following:

1) If the lease timer expires, the IP Phone will automatically grab another IP address without any problems.

2) If I were to delete the DHCP scope, then recreate the scope with the exact same details before the original lease timer expires, the IP Phone will lose voice temporarily but will not drop the configuration.

3) If I were to delete the DHCP scope, then recreate the scope with a different range of IP addresses, before the original lease timer expires, the IP Phone will no longer be available to use the previous IP address and reboot to obtain an IP address from the new scope. Thus dropping any call.


Now, I have yet to talk with the customer's IT guy, but I am fairly certain he changed the scope after the IP set was assigned an address, and the phone just waited for the timeout to expire and grab a new IP address.



Thanks! And hopefully this helps someone in the future..

--DB

http://support.csctech.us

Remote Support Specialist

 

[mattKnight]

There is a 46xxsetting that controls how the phone behaves on DHCP lease expiry

################# DHCP ADDRESS SETTINGS ##################
##
## DHCPSTD controls whether the phone continues to use an
## expired IP address if the phone received no response to
## its address renewal request. 0 for yes, 1 for no.
##
## SET DHCPSTD 1
##

Make sure that your test bed uses the same setting as the live system - especially as IT guys will want the phone to behave like their other dhcp hosts (i.e. SET DHCPSTD 1)

Take Care

Matt
I have always wished that my computer would be as easy to use as my telephone.
My wish has come true. I no longer know how to use my telephone.

 

[hairlessupportmonkey]

you could also set up some reservations for IP phones, or even allow the IPO to assign IPs within the same range as the Windows Network DHCP server, and just tick DHCP for Avaya Phones only and use the built in HTTP / TFTP server and SD card for all your files.

that way you dont have to rely on the IT Guy keeping his hands off your voice network!

 

[mattKnight]

you could also set up some reservations for IP phones, or even allow the IPO to assign IPs within the same range as the Windows Network DHCP server, and just tick DHCP for Avaya Phones only and use the built in HTTP / TFTP server and SD card for all your files.

nasty bad monkey....

Just because the IPO can be set to only allocate addresses to avaya handsets (stopping otehr hosts from getting an IP address) won't stop the windows server from giving addresses to handsets.

Nasty nasty solution - Bad monkey

Take Care

Matt
I have always wished that my computer would be as easy to use as my telephone.
My wish has come true. I no longer know how to use my telephone.

 

[tlpeter]

The DHCP server won't give an adres when the option 242 is not made.
It will grab the ip form the ipo before the normal dhcp server can respond

I have done it a couple of time too because of stupid IT manager who will not set it up for you or what ever reason.


Homo sapiens non urinat in ventum

honey, i fried the IP Office !!!

Sarcasm, it's only one of the services I offer.

 

[mattKnight]

>The DHCP server won't give an adres when the option 242 is not made.

I bet it will offer an address.... The phoen may not accept it though.
That being said - I didn't know that... so a * for that bit of knowledge.

However, You can still end up with conflicts and stuff (also soem MS DHCP - SBS particularily server shutdown when they detect another DHCP server)

Still a nasty solution IMHO

Take Care

Matt
I have always wished that my computer would be as easy to use as my telephone.
My wish has come true. I no longer know how to use my telephone.

 

[tlpeter]

It is nasty but sometimes you need to be nasty when the IT guy is trying to be a smart ass

For the dhcp problems with bootp, there is a reg key for that so it won't stop the DHCP server anymore.

I also prefer an external DHCP server, way more flexible.


Homo sapiens non urinat in ventum

honey, i fried the IP Office !!!

Sarcasm, it's only one of the services I offer.

 

[hairlessupportmonkey]

thanks peter. nice to know im not the only nasty bastard here from time to time... ;-)

 

[tlpeter]

I pretend being nice most of the time


Homo sapiens non urinat in ventum

honey, i fried the IP Office !!!

Sarcasm, it's only one of the services I offer.

 

[mattKnight]

>For the dhcp problems with bootp, there is a reg key for that so it won't stop the DHCP server anymore

I know about that (i can't remember it - but google is my friend)

However, if the IT manager isn't going to alter the DHCP scope for you, how much hope do you hold for them fiddling with the registry?

I agree - sometimes having as nasty gnarly solution in your toolbox is good - but planning to use it is bad...

Take Care

Matt
I have always wished that my computer would be as easy to use as my telephone.
My wish has come true. I no longer know how to use my telephone.

 

[tlpeter]

I never plan it
I rather have a good relationship with the IT guy but sometimes there some ugly censured guys out there who think they are a god.


Homo sapiens non urinat in ventum

honey, i fried the IP Office !!!

Sarcasm, it's only one of the services I offer.

 

[mattKnight]

>ugly censured guys out there who think they are a god.

Sounds like me!

Take Care

Matt
I have always wished that my computer would be as easy to use as my telephone.
My wish has come true. I no longer know how to use my telephone.

 

[hairlessupportmonkey]

hence the need for sledge hammer ugly tools in the tool box matt!

 

[mattKnight]

Take Care

Matt
I have always wished that my computer would be as easy to use as my telephone.
My wish has come true. I no longer know how to use my telephone.