How the Virtual interface in Celerra works

Hi Folks,

Generally, we use to create a multiple logical interface on top of the physical interface. Virtual interface IP would be on same Subnet & also we have a unique MAC addr for all this interface. I am wondering , how it does really filter the traffic to each and every virtual interface.

Ex: Below three interfaces are from same physical interface called CGE1-2 with same MAC addr. However each interface belongs to different CIFS servers and user groups.

1a protocol=IP device=cge-1-2

         inet=10.218.100.10 netmask=255.255.255.0 broadcast=10.218.100.255

        UP, Ethernet, mtu=1500, vlan=0, macaddr=0:60:48:1f:a9:d2

1b protocol=IP device=cge-1-2

         inet=10.218.100.11  netmask=255.255.255.0 broadcast=10.218.100.255

        UP, Ethernet, mtu=1500, vlan=0, macaddr=0:60:48:1f:a9:d2

1c protocol=IP device=cge-1-2

         inet=10.218.100.12 netmask=255.255.255.0 broadcast=10.218.100.255

        UP, Ethernet, mtu=1500, vlan=0, macaddr=0:60:48:1f:a9:d2

Still scratching my head ,how the Celerra will be able differentiate the traffic

Thanks
Saran