WC1              WC4          
 +-----+   +----+   +---+  /      \  +---+  /      \  +---+   +----+   +-----+
 |NIC  |   |Rx  |   |DLB| /        \ |DLB| /        \ |DLB|   |Tx  |   |NIC  |
 |Ports|---|Core|---|   |-----WC2----|   |-----WC5----|   |---|Core|---|Ports| 
 +-----+   -----+   +---+ \        / +---+ \        / +---+   +----+   ------+
                           \      /         \      /                           
                              WC3              WC6