Packet Losses after Cisco IP Phones deployment

razamrazam MemberMember Posts: 39 ■■□□□□□□□□
Hi all,

We have implemented Cisco IP Telephony recently and are facing packet loss issues after deploying Cisco IP Phones.

Physical connection details

Access Switch ---> IP Phone ----> Computer.

IP Phone is connected directly to the switch and computer is connected to the IP Phone.

Obviously a separate voice and data vlan, different subnetworks for voice and data.

Now if we ping from computer to the default gateway (which is configured on the core switch), sometimes we see many packet losses, sometimes no packet losses. Its not stable.

if we remove the cable from the IP Phone and connect it directly to the computer. (computer to switch direct connection) then no packet loss at all and the network is stable.

if somebody has experienced this kind of problem before please give some advise. what is the issue ?

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