Dear All,
I have one-way audio issues with IP phones 7962G connected to a catalyst 3750. The problem is calling between two IP phones one the same switch and same VLAN.
The scaniors are as follows:
1. Both IP phones on the same switch and same VLAN. The called phone rings but there is only one-way audio.
2. Both IP phones on the same switch but different VLANs. No problem at all.
3. Each IP phone on different swicthes but on the same VLAN. No problem at all.
I have also done wireshark capture and see ARP request sent by one of the phones but unanswered.
Catalyst 3750
IOs version: 3750-ipbasek9-mz.122-55.SE3.bin
Port Settings:
interface FastEthernet1/0/8
switchport access vlan dynamic
switchport mode access
switchport voice vlan 81
ip arp inspection limit rate 100
mls qos trust device cisco-phone
spanning-tree portfast
spanning-tree bpduguard enable
spanning-tree guard root
service-policy input IPPHONE+PC
ip verify source port-security
