Posted on 2014-09-12
I have a Cisco SG300 (Small Business Switch) and an ASA5505 with the Security Plus license. I have two VLANS created on the SG300 and am trying to bring both into the ASA on port e0/4. When I change port 0/4 from "switchport mode access" to "switchport mode trunk", I lose my connection to everything on port 4 (My inside network).
I precede the "switchport mode trunk" command with "switchport trunk allowed vlan 1,3" but I still lose all connectivity on that port.
What am I missing?