The Same Mac address is shown in 2 VLAN,

[cis.learner]

HI any Idea what is the reason to cause this ? I just have assigned port Gi1/0/1 to VLAN700.

Please help.

ABC#sh mac address-table add 00-17-65-DC-B8-GD
          Mac Address Table
-------------------------------------------

Vlan    Mac Address       Type        Ports
----    -----------       --------    -----
700    0017.65DC.B8GD    DYNAMIC     Gi1/0/1
800    0017.65DC.B8GD    DYNAMIC     Gi1/0/12

Thank you

[ashok.ghodke]

this is not the mac address, its a root id, if you see other vlans you will identify the same mac learn from the root switch

[rcoronadofornell]

I was have the same problem and the issue was that the ip phone has a section that you can specify what vlan do you want to use in the pc port, I just disable this function and it just worked

[Richard Burts]

Thank you for sharing your experience with this.