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IP Phone not registering with "Subnet Conflict" error

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telecotek1

telecotek1

Vendor
Nov 13, 2007
390
US
We have an IP phone that wont register at a remote office connected via hardware VPN.

IP Office
192.168.7.254
255.255.255.0
192.168.7.1

IP Route in IP Office
0.0.0.0
0.0.0.0
192.168.7.1

Remote Office
192.168.11.x
255.255.255.0
192.168.11.1

Phone Statically assigned
192.168.11.180
255.255.255.0
192.168.11.1
call server - 192.168.7.254

Is it my imagination but aren't you normally OK with using the .7 subnet on the phone? Don't remmeber ever seeing this error before. If yes what should be looking for on the network side to make this work?
 
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Try a 255.255.0.0 subnetmask on the phone.

ACS IP Office or is it ACSS :)
ACA - Implement IP Telephony -- ACA - Design IP Telephony
ACA - Voice Services Management
______________
Women and cats can do as they please and men and dogs should relax and get used to the idea!
 
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subnet conflict usually indicates the phone's IP address is different to the gateway address. Check the setup carefully

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.
 
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The setup looks OK to me.
Can you connect a PC with the same settings on the remote site and ping/access the IP Office?
 
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Thanks guys, The phone was configured remotely and shipped to the site and the local IT guy attempted to bring it up. I'll be at the site this Saturday and will review the settings.

found this on the Avaya user forums thought this might shed some light on things...

The simple solution to this is to create a NAT entry on the remote side for the Avaya system. Basically you need an IP address on you remote LAN to translate to your Host site. Then use the remote site's assigned IP as the call server, router, etc setting on the IP Phone. The firewall translation will translate the remote site's IP to the host site's Avaya system IP address.
 
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Try a tracert from the main site to the ipoffice at the remote site.

Then you will see past which ip addresses it will go.

Avaya_Red.gif

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

Dain Bramaged
___________________________________________
 
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That solution looks to solve bad programming in the network devices to be honest.
 
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Finally had someone go over and chaeck the settings on the phone. The phone is setup the way i originally described.

Tried changing the subnet mask to 255.255.0.0 no change in the error. 'subnet conflict'could this be a bad phone?

The customers inhouse engineer is telling me they are using ospf. don't think he knows what ospf is...

Any thoughts here I'm miffed.

Still need to get to the site and confirm that the switch can be pinged from the remote site. Even I couldn't ping the remote site I don't think it would give the 'subnet' error.

 
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Are you sure there isn't a type somewhere ?
Sometimes you press the button but nothing happens.
Happened me lately too because i was in a rush!

ACS IP Office
APSS IP Office
ACA - Implement IP Telephony -- ACA - Design IP Telephony
APSS UC
ACA - Voice Services Management


______________
Women and cats can do as they please and men and dogs should relax and get used to the idea!
 
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i guess its possible but i had non tech person cycle thru the setting and read them back to me. I know what you're saying tho done it a bunch of times -fat fingered a setting...
 
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Get a phone and put in those exact same settings in it and power it up.
Try to see what happens.

ACS IP Office
APSS IP Office
ACA - Implement IP Telephony -- ACA - Design IP Telephony
APSS UC
ACA - Voice Services Management


______________
Women and cats can do as they please and men and dogs should relax and get used to the idea!
 
Upvote 0 Downvote
it really only throws up that error when the IP and router address are on different subnets.

looking at your IP address it wouldnt be hard to transpose 192.168.11.x and type 192.168.1.x in either field.

I would ask the non-techie to read them out again.
 
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