I have a 6509 running 7 gig interfaces, each interface is using sub interfaces to route vlans however It does not appear that I can span a vlan across multiple physical interfaces. I would like to span 1 given vlan across all switch ports and was wondering if i could use a vlan interface for this? how would I assign the physical interfaces, as trunks? I do not want to remove the sub interfaces as we can not convert those at this time.
So my network is a 6509 at core going to 3 different network segments, the 6509 is the only layer3 device, everything else is layer2. I was referring to your second option, I want one vlan across more than one port.
We are running sub interfaces because the 6509 replaced a 12000(using sub interfaces, we just kind copied and pasted the config from 12k into 6509) which was setup way before me and since we have over 150 vlans per interface we haven't been too inclined to make a switch, other than this little problem we really don't have a reason to.
When I say mix I dont mean just using subs and vlan interfaces on the same switch, i mean on the same interface. Like have one interface that is using both subs and acting as a trunk.
I can't really switch everything to vlan interfaces right now, the sub interfaces kind of have to stay for now. but I also need the cross vlan connectivity if possible.
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