I have installed two Catalyst 4507R connected on trunk and I have configured an a Vlan 3 for IP telephony and an a Vlan 2 for dates.
The interface ports at begin were configured all:
switchport access vlan 2
switchport voice vlan 3
qos trust device cisco-phone
qos trust cos
service-policy output autoqos-voip-policy
auto qos voip cisco-phone
tx-queue 3
priority high
shape percent 33
The ip addresses for Vlan 3 (voice) are released from DHCP which is configured on the Catalyst.
The ip addresses for Vlan 2 are released from Windows 2000 DHCP server connected on a port of Catalyst.
With configuration above we seen that IP Telephony
got ip address from Windows 2000 DHCP server.
All it function if I connect DHCP Server on port configured like below:
switchport access vlan 2
switchport mode access
Somebody can explain it ?
Thanks
Lorenzo
