Softphone Traffic Routing
Posted on 2012-08-21
We have been asked to integrate around 25 softphones into our environment. Currently VOIP and Data is split into separate VLANs.
We are going to attach a second USB NIC to the PC's that need softphones. NIC 1 will be on the data VLAN and the USB NIC can be tagged to the VOIP VLAN.
In testing this works to a degree. The USB NIC gets assigned to the VOIP VLAN and given the correct IP Etc.. I was planning on blocking all traffic apart from VOIP and allow access to the external TFTP server on our firewall on the VOIP VLAN.
When I do this I run into problems. Essentially... I need the USB NIC to only send VOIP traffic to the VOIP VLAN from the softphone, therefore not flooding our VOIP WAN connection with data traffic. NIC 1 should always handle any data traffic out of the data VLAN.
Is this possible to do? it seems that I need to do this at the source? NIC metrics and bindings seem to make no difference...
We are using a mixture of HP ProCurve 2520 POE and 2910 switches.
Any ideas appreciated... Let me know if you need more info on the setup?