nevermind, I find the answer to my problems. Interfaces were down because there wasn't a port assigned to the vlan associated with that interface..... the shame...
I´m trying to do LAN segmentation using a ssIII 4900 as our core switch/router and several 3300's.
I've set up the trunk ports, but I have a problem when creating Ip interfaces.
Example:
I want to create an IP interface 172.16.7.254 /22 in my 4900, that will be the default gateway of that...
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