05-01-2008 05:42 AM - edited 03-15-2019 10:23 AM
Hi,
We recently applied port-security in our network. Our security policy is maximum allowed mac-address per port is 2(1 for phone and 1 for pc). After that all ports which are connected to the 7985 phones goes down. We noticed that 7985 phones generating multiple mac-address when we making multiple calls from same line. We are using CCM4.2
Why it is happening?...Any one knows Let me know.
Thanks
05-01-2008 06:52 AM
Hi,
This is a know issue with switches running OLD IOS. In those releases IP Phones uses two MAC address and one used by PC.
Thus you need to allow 3 MAC addresses per port 2 for phone and 1 for PC. Don't ask me why phone uses two mac I don't have any answer for that & I can't think of one.
You have two options either to upgrade the IOS or to allow 3 MAC addresses per port.
For a trial allow 3 macs on one of the interfaces with the phone and confirm that everything works after allowing 3 macs.
-> Sushil
05-01-2008 06:58 AM
Hi sushil,
Thank you for your response. I already tried this. Finally i found the phone showing upto 5 mac addresses.
08-06-2008 10:40 AM
Hi!
Did you resolve this issue?
Was it a particular phone, or was a general issue?
What did you do to solve it?
Regards,
Ariel
08-06-2008 09:56 PM
Hi,
Thank you for your reply...It not solved yet. It seen all 7985 phones. I removed the porsecurity from the ports, which are connected to these phones.
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