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<TITLE>ICMP to 7965 Phones - Packet loss when pinging from switch?</TITLE>
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<FONT FACE="Calibri, Verdana, Helvetica, Arial"><SPAN STYLE='font-size:11pt'>All,<BR>
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Today when I was troubleshooting some issues on our LAN I ran across a few very weird issues in regards to ICMP and both 7965 phones and our UCM servers. In my scenario I have a 7965 phone connected to a 3750-PS switch using the voice VLAN. When I ping the phone’s IP from either my Macbook (OSX) or Windows 7, the phone promptly responds with 0% packet loss and all is happy. However, today I tried pining that same phone from our CCM voice gateway, and for whatever reason it was dropping every 6th packet or so. I tried it from our core switch, same results. Finally, I pinged it directly from the Cisco 3750 switch and again, had the same results, packet loss. I can ping any Windows or OSX server across our network without any loss. Should the phone be dropping any packets? I remember reading once that the UCM servers had built in CSA software that may cause this type of result, but I wasn’t sure about the phones. <BR>
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We don’t seem to be having anyone complaining about voice calls, and the MOS scores all look good in the NAM. I’m just a bit confused, and I would like everything on my network to be perfect!<BR>
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Any input would be greatly apprecaited!<BR>
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Matt</SPAN></FONT>
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