Option 242 cisco dhcp


Are you are experiencing a similar issue? I had the same problem going around the bush. I'm curious why you don't just utilize a DHCP relay and connect the server with an access port configuration. Your solution worked like a charm!

I think Daniel Wood hit the nail on the head here. Thanks very much for blogging this. Fixed the problem in seconds. If option 242 cisco dhcp have any questions, the best way to contact me is through Twitter at aconaway. It all depends on the phone.

I think Daniel Wood hit the nail on the head here. Once option 242 cisco dhcp config was removed from the switch, everything was kosher again. Thanks for the information! I may take a day and test this myself in my home lab.

Privacy Policy Support Terms of Use. The fix works, but I'm not really satisfied with the answer of "it doesn't like it". Well, it turns out that the server was in the original option 242 cisco dhcp switch, and we had moved it to a port configured for a workstation a fact I left out in the original edit of this post. The DHCP settings are specific to the phone manufacturer.

All Courses From novice to tech pro — start learning today. I would like to receive news, updates and offers from Experts Exchange. Once that config was removed from the switch, everything was kosher again. Privacy Policy Support Option 242 cisco dhcp of Use. We just had a similar problem and were pulling our hair out trying to figure out what was wrong.

So you will really need to find out from NEC the specifics for how the phone gets its information. One from the relay agent on the untagged vlan and one broadcast hitting the server directly over the Dot1q port. All phones gave me the ACK error. That would be a question for NEC, however, you could have the switch mark the traffic on the ingress port. It all depends on the phone.

Also, some phones have different methods of getting their vlan. I didn't get enough details to know what went wrong. NEC phones use Thank you for this!

By clicking you are agreeing to Experts Exchange's Terms of Use. Thanks very much for blogging this. So basically these additional options tell the phone where to option 242 cisco dhcp down its config from and what call server to register with. So basically the phone boots up in the data vlan, receives a data IP address, and then looks at these options. Anyway this was exactly the problem that I was having, so kudos, helpful article.