03-31-2008 03:34 AM - edited 03-13-2019 05:07 PM
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)?
03-31-2008 03:59 AM
Could you send the config your using on the switch port??
03-31-2008 05:06 AM
interface FastEthernet0/33
switchport access vlan 150
switchport mode access
switchport voice vlan 50
mls qos trust dscp
dot1x mac-auth-bypass
dot1x pae authenticator
dot1x port-control auto
dot1x timeout quiet-period 1
dot1x timeout tx-period 1
dot1x reauthentication
dot1x guest-vlan 250
dot1x auth-fail vlan 250
spanning-tree portfast
03-31-2008 10:33 AM
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??
03-31-2008 08:00 PM
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
Symptom:
PC plugged at the back of a 7961 cannot get its IP settings from DHCP
Conditions:
option "PC Voice VLAN access" is disabled in CCM device configuration (default is "enable" )
Workaround:
re-enable the "PC Voice VLAN access" option
03-31-2008 11:28 PM
Jar41sccp.8-2-2ES1.sbn is the version
03-31-2008 11:24 PM
ACS as radius server
04-01-2008 01:25 AM
So first are you seeing the port as being authorised when you see this issue??
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