Uplink-switch command

[Deplumi]

Hi

We are using older ICX switches (ICX6610) with this vlan configuration:

vlan 123  by port

tagged ethe 1/1/7 ethe 1/1/8 to 1/1/9 1/1/24 ethe 1/3/1

uplink-switch ethe 1/1/24 ethe 1/3/1 

Meaning all the broadcast and unknown-unicast traffic is switched to the uplink-switch ports. Other ports (eth1/1/7,8,9) can not communicate with each other (at least they can not broadcast).

Now we are trying to implement newer ICX switches (ICX7550) and guess what, there is no uplink-switch command available. 

Config guide mentiones PVLANs, but is is very confusing. 

Any idea how to do or achieve uplink-switch on newer ICX devices?