When a Computer is attach to a IP phone 7961, some times it will not get a IP address when the comupter boot.
it is possibly to fix the problem if the computer is direckly attach to the wall jack it will get a Ip address and it will still get a Ip address if it is attach to the phone again.( I the IP phone is unattach from the wall jack and attach again the computer will not get a Ip address)?
switchport access vlan 150
switchport mode access
switchport voice vlan 50
mls qos trust dscp
dot1x pae authenticator
dot1x port-control auto
dot1x timeout quiet-period 1
dot1x timeout tx-period 1
dot1x guest-vlan 250
dot1x auth-fail vlan 250
This seems like a dot1x issue. When you hit the issue can you check that the dot1x has authenticated the port?? i think the command is show dot1x interface fax/x detail.
Also if your using mab there is a known issue that the DHCP times out before its been authenticated. Work around for this is to release, renew the ip address.
I will also try your config out on my switch tomorrow. Are you using ACS or IAS as your radius server??
What version of phone software are you running? It may be impacted by this bug...
CSCse08120 Bug Details Bug #12 of 27 | < Previous | Next >
7961 - PC cannot see data traffic if PC Voice VLAN Access is disabled
PC plugged at the back of a 7961 cannot get its IP settings from DHCP
option "PC Voice VLAN access" is disabled in CCM device configuration (default is "enable" )
re-enable the "PC Voice VLAN access" option