<div dir="ltr">Aren't the first few values of a MAC tied to the vendor? If so, does this trick make it look like the second port is a different vendor product? And if so, it would be funny if it was a competitor.<div><br></div><div>Ah, but no such luck today.</div><div><br></div><div><img src="cid:ii_jhhx33e01_16388c3b26b144f0" width="339" height="317"></div><div><br></div><div>Source: <a href="https://macvendors.com/">https://macvendors.com/</a><br><br></div></div><div class="gmail_extra"><br><div class="gmail_quote">On Tue, May 22, 2018 at 4:30 AM, Ryan Huff <span dir="ltr"><<a href="mailto:ryanhuff@outlook.com" target="_blank">ryanhuff@outlook.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">Yes, that is correct. <br>
<br>
The ports are differentiated by the device name. However, the ports themselves are registered to CCM and communicate on the network through a single network interface on the ATA.<br>
<br>
The second port in the ATA will have the first two characters striped from the beginning of the MAC address and a “01” appended at the end of the MAC address (shown in the device name of the two ports).<br>
<br>
Essentially, the ATA is a mini, purpose built media conversion switch. A lot going on under the hood of those silly little things when you think about it :).<br>
<br>
Thanks,<br>
<br>
Ryan<br>
<span class=""><br>
> On May 22, 2018, at 04:57, Jon Fox <<a href="mailto:jonfoxipt@gmail.com">jonfoxipt@gmail.com</a>> wrote:<br>
> <br>
> Hello All<br>
> <br>
> Trying to troubleshoot an issue with a Cisco ATA - CUCM 10.5.2SU3<br>
> <br>
> I've not had to touch these for some time, so cannot remember if its natural behaviour for Port 1 and Port 2 registering with the same IP address? Is that standard? - Screenshot attached.<br>
> <br>
</span>> <image.png><br>
> <br>
> <br>
> Many thanks<br>
> Jon<br>
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