Here is the answer: the goal is to communicate between vlans on sw-1 to vlans on switch 2 (ignoring the mgmt vlan). install the cx-4 (non-stacking) modules, each module has 2 ports. if installed in the first bay the ports will be xg1 and xg2, if installed in the second bay then the ports will be xg3 & xg4 i connected from xg1 on sw-1 to xg2 on sw-2 if you run "show stack-port" you should see the status as "up" and the type as ethernet (no stacking is done with these particular cx-4 modules) then you need to assign the connected xg ports as trunk ports rather than access ports, do this on both switches then assign the xg ports as tagged ports for all the vlans you want to communicate with (in my case vlan 2 & 3) that's all
Hello,   I have two 6248 switches that i will be connecting together using CX-4 modules. There will be one (dual port) module in each switch and i will be using two cables to interconnect the switches.   The workstation switches will connect to vlan2 (ports 2-10) on both switches (half on one PC6248 and half on the other, no STP) The servers connect to vlan3 (ports11-48) vlan2 > 10.0.1.0 /24 vlan2 > 10.20.0.0. /16   (i've attached a picture, sorry some of the lines are very faint) What will the cx-4 interfaces be configurable under would it be one of the xg interfaces (i.e xg1-1)? Since i want vlan2 & 3 on sw-1 to talk to vlan2 & 3 on sw-2 will i be creating another vlan for the cx-4 connection then route through that? or should i have vlan2 & 3 on sw-1 and create vlan 4-5 on sw-2 all having different subnets?   I hope i explained myself properly, please ask if you need me to clarify anything. Thanks   [IMAGE]      
CX-4 non stacking modules