I'm running CM 4.2 with a cisco 7940 phone. I have a Toshiba PC plugged into the phone. Whenever a call is made, LAN access to the PC is cut off. If the call goes on hold, the PC is fine again, but once the call is resumed, the PC can not connect to anything on the LAN. Other laptops and machines work fine, only this laptop seems to be affected. I tried different phones and diffrent runs, but the issue still remains.
Does anyone have any ideas what could cause this. I don't see how it could be the PC since the PC is in the data VLAN and phone is in the voice VLAN, nothing should be affected. I have cat express 500 switches, could these lower model switches be causing the problem?
the PC port on a 7940 can handle both voice and data VLAN.
Also, if this is happening only on 1 PC it could be an issue with the PC and not the Phone. Do u have any special config on the PC ?? The best way to find out what is happening is to collect sniffer traces/span the switchport
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The short answer is that you don't.... That isn't entirely true while at
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Topology: IP Phone > Switches > Microsoft NPS setup to forward 802.1x
proxy to > ISE 2.1 patch 3 Authentication: EAP-TLS using Cisco MIC SANs
Phone Models 802.1X support? 802.1x flavor Addtl Comment EAP-MD5 EAP-TLS
Cisco 3905 Y Y N Cisco 6911 Y Y N Cisco ...