Comware

I have two existing switches that have their gbic port 23 and 24 trunked together on vlan 64.  If i wanted to add another switch from another suite how would I add it to vlan 64 so that it is just an extension of the vlan that is already in place?  I have tried adding another gbic to an empty port slot (F22) and tagged it to vlan 64 and I did the same thing on the new switch that I'm trying to get connected so that they are both tagged.  Am I going about this the right way or would i need to break the existing trunk?  Thanks.

If i am getting you right you want to connect another switch that will be in VLAN 64?

Set the F22 to untagged vlan 64