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How to get a Cisco 7940 working on a small network

plq
plq asked
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Last Modified: 2012-05-11
Hi Folks,

I have to get a Cisco CDP solution together for a customer to do IP phone discovery, so I've bought a Cisco 7940 phone, plus a power supply, and now I have to get the thing on the network.

I plugged it in, it says "Configuring VLAN" then it says "Configuring IP" - and there it stays.

I don't even need to use it for phone calls, I just need to get a cdp tool working with it.

My network is the classic Microsoft AD / Microsoft DNS / Microsoft DHCP, all behind a cisco asa 5505. All our IP's are 10.5.0.0/24

So, is there a way to get it onto the network and pingable, cdp queryable, even working ??

thanks
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Senior Systems Engineer
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plq

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Commented:
Thanks for this. I'm way out of my depth. I'll follow that doc first and will come back to EE for next steps.

thanks
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plq

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Commented:
Well although its stuck on configuring vlan it did get an IP address and I'm actually getting the info I need from http via /DeviceInformationX etc.

So I'm getting what I need without using CDP.

I'm not a cisco/networking expert hence the confusion.

Will respond back...
greg wardSenior Systems Engineer
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Commented:
Sorry i did not realise it could do cdp without loading the firmware.
I just reset my phone and while it was configuring vlan i was able to see cdp info of the device.

Greg
plq

Author

Commented:
OK Its all working. I'd just like to ask one more question.

Would you say its normal for IP phones in a corporate or gov organisation to be patched onto separate subnets from the PC network ? Or would they normally just be plugged into the main network and dhcp'd in the same ip range as the pcs ??
greg wardSenior Systems Engineer
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greg wardSenior Systems Engineer
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plq

Author

Commented:
Excellent. that makes my life a lot easier..

Appreciate your help.. thank you

Points coming up

Commented:
Also it's worth noting that each Cisco IP Phone as a switch built in that supports Trunking and QoS. It also means that you don't have to double up on switching for IP Phones and Computers yet you can still run them independently.
plq

Author

Commented:
Just one more if I may.

It would be really useful if I could pull the phone number or extension number from the http interface. I've googled on this and it doesn't seem possible, but maybe you guys know a trick that would get this info for me ???

thanks
plq

Author

Commented:
Hey guys, I never got an answer to my final question re the Phone Number or Extension Number ... if you're listening. .. is this possible ?

thanks
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