Mac address for address every virtual server?

I want know Which is mac address for address ip to every virtual server?

it is vlan mac address unless you configure mac masquerading.

sol13502: Configuring MAC masquerade (11.x)

How I could see this from GUI and CLI?

yes, it is shown in gui and cli.

root@(ve11a)(cfg-sync In Sync)(Active)(/Common)(tmos) show net vlan external |grep Mac\ Address
Mac Address (True)  00:50:56:b3:0b:1a

Thank you, nitas!

Why be configure the MAC masquerade?

To optimize the flow of traffic during failover events, you can configure MAC masquerade addresses for any defined traffic groups on the BIG-IP system. A MAC masquerade address is a unique, floating MAC address that you create. You can assign one MAC masquerade address to each traffic group on a BIG-IP device. By assigning a MAC masquerade address to a traffic group, you associate that address with any floating IP addresses associated with the traffic group. By configuring a MAC masquerade address for each traffic group, a single Virtual Local Area Network (VLAN) can potentially carry traffic and services for multiple traffic groups, with each service having its own MAC masquerade address.

sol13502: Configuring MAC masquerade (11.x)

i loose my connectivity after i manually configure a random 'MAC Masquerade Address' on the traffic-group-1

After i remove the manually configured 'MAC Masquerade Address' on the traffic-group-1 end-to-end traffic resumes again.

Why is that?