[c-nsp] 6148 L2 local switching?

[MKS]

A popular topic, I know, but I have a question that I can't find an
answer to in previous discussions.

In a given port-group, let's say 1-8, and all the ports are
switchports in the same vlan.
can port 1-> port2 reach a gig throughput at the same time as port 3->port4.

In other words, this this card capable of L2 local switching? or does
every packet go to the sup and back?

Regards
MKS