I am in the situation of making Cisco CallManager 4.1(3) and 7961 phones work on a 3Com 7757 switch. The network is designed with a Cisco 6509 as the Core switch, and four 7757s connected to it for users. I am able to get the phones to work on the 3Com, but I can't get DHCP option 184 working properly on my MS Windows 2003 DHCP Server. As a result, the phone never gets tagged to the voice VLAN and never gets the IP address from the scope I have identified for voice, it only gets an address from the scope for the data network. Anyone out there have any experience in this area? Yes, I know it would have been easier to stay all Cisco, but this was done before I got here. Thanks in advance.
The problem is the phones are to be connected to the 3Com, and they support Option 184, not 150. The phones can access the DHCP server, but because there is not an Option 184 on the network right now, the phones do not tag to the voice vlan. So the big question is, how can I create option 184 for use with Cisco phones on 3Com switches for VoIP, on the Windows 2003 DHCP?
Thanks Tim, I actually was working from the very same PDF. Unfortunately, the command is not available. In reviewing the doc again, I noticed that it requires software version 3.02.02 or higher in this example (for the 5500). I checked my switch and it has version 3.02.00r. I am going to check 3Com and see if there is an upgrade.
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