The reality is that it is not difficult to set up: a separate management VLAN all VLANs explicitly declared explicit declaration of VLANs permitted on trunks use of a blackhole VLAN where configuration insists upon an entry Personally, I suggest using 101 as the black hole You asked me once, what was in Room 101. I told you that you knew the answer already. Everyone knows it. The thing that is in Room 101 is the worst thing in the world. — O'Brien, Part III, Chapter V - George Orwell, 1984 @PhilipDAth suggested using a non-existent VLAN, the selection of an appropriate number was an automatic choice
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