So my core router/switch upgrade is going smoothly (thanks everyone for prior input), but I have a brain fart trying to figure out this last piece. I'm not sure if I'm over thinking it or what... Essentially, I'm trying to get our new router/switch connected to my MetroE providers device so I can slowly move over connections to my new core switch. Currently it's like this: CenturyLink Metro 1Gb --> Fiber to port on 6509 I want something like this: MetroE Switch --> L2 Switch --> Port on 6509 |------------ Port on new core switch My hiccup is on the 6509 it is currently setup as a trunk port passing multiple vlans which correlate into our different sites. I'm not sure if I need to set the ports on the L2 switch as 'switchport access mode' or in trunk mode? If it is trunk mode then I would have to create all of the vlans on the L2 switch so they all talk correctly, right? I don't know how the MetroE switch is configured, but I assume my ports would be something like this on the L2 switch: MetroE port -- switchport trunk allowed vlan all 6509 port -- switchport trunk allowed vlan 2,3,4 (etc, all the sites I want on the 6509 still) new core -- switchport trunk allowed vlan 6,7,8 (the sites I've moved over) As I'm typing this out, I think I got it... as I'm moving a site over, I'll remove the vlan from the 6509 port on the L2 switch and add it to the new core switch port. I'll just have to make sure out the vlans are created on the L2 switch prior to introducing it into the mix. Edit: Oh and the reason why I'm having to split the connections myself is because CenturyLink won't give us another port on their device connected to the same 'cloud' while we transition or else that would have been optimal.