We replaced all switches for an ISD a few months ago and their old PA/Bell system worked perfectly fine. Now they have installed a new system by "Front Row", and when an announcement or bell rings, it crackles/generally isn't super clear. Their support has told us that what they do is add a header (or something to the header) that allows the system to work, and its all based on unicast. We did a packet capture, and it is showing two packets for every packet being sent on that network, which according to them must be coming from something on the network. I cannot fathom what would be doing this, anyone have any ideas? The core is a 6300m SFP+ and all access are 6200, stacked where there are more than one switch.
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Alex Wright
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