06-21-2018 09:53 AM - edited 03-08-2019 03:26 PM
Hi, Can anyone help me to understand that I have a switch port connected with an IP Phone and a PC but it is showing 3 mac addresses on this port. Phone is in voice vlan 30 and port is in vlan 10 but I see two mac addresses on vlan 10 and one on vlan 30 on this interface when i run sh mac-add-table inter <current>.
Can anyone explain that ? Thanks in advance.
06-21-2018 10:02 AM
Hi,
Lookup the mac address to find out the vendor. That might help.
Any other NIC on the PC? Wireless or Virtual?
06-27-2018 07:59 PM
Provides the output for ports G1/0/10 thru 19:
sh mac address-table | include Gi1/0/([1][0-9])
Provides the outputs for G1/0/20 thru 39:
sh mac address-table | include Gi1/0/([2-3][0-9])
06-27-2018 08:27 PM
can you share the switch port config?
is phone MAC address shown in both VLANs?
06-28-2018 02:12 AM
Are you sure no one has connected a switch to the interface?
Martin
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