[cisco-voip] ATA190

[Anthony Holloway]

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.

Ah, but no such luck today.


Source: https://macvendors.com/


On Tue, May 22, 2018 at 4:30 AM, Ryan Huff <ryanhuff at outlook.com> wrote:

> Yes, that is correct.
>
> 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.
>
> 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).
>
> 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 :).
>
> Thanks,
>
> Ryan
>
> > On May 22, 2018, at 04:57, Jon Fox <jonfoxipt at gmail.com> wrote:
> >
> > Hello All
> >
> > Trying to troubleshoot an issue with a Cisco ATA - CUCM 10.5.2SU3
> >
> > 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.
> >
> > <image.png>
> >
> >
> > Many thanks
> > Jon
> > _______________________________________________
> > cisco-voip mailing list
> > cisco-voip at puck.nether.net
> > https://puck.nether.net/mailman/listinfo/cisco-voip
>
> _______________________________________________
> cisco-voip mailing list
> cisco-voip at puck.nether.net
> https://puck.nether.net/mailman/listinfo/cisco-voip
>
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <https://puck.nether.net/pipermail/cisco-voip/attachments/20180522/460a9185/attachment.html>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: image.png
Type: image/png
Size: 38614 bytes
Desc: not available
URL: <https://puck.nether.net/pipermail/cisco-voip/attachments/20180522/460a9185/attachment.png>