[c-nsp] 3560g switch - tagged vlans and untagged frames

Mike mike-cisconsplist at tiedyenetworks.com
Tue Apr 9 00:16:04 EDT 2013


	I would like to be able to accept both tagged and untagged frames on my 
3560g. For the untagged frames, I'd like to be able to say these are a 
member of some vlan - say 100 - otherwise I want to be able to allow 
tagged frames from some list.

	In testing, it doesn't appear that "switchport trunk native vlan xxxx" 
is doing the job; anything I send untagged is dropped and doesn't show 
up in the switch mac address tables.  Here is my config:

interface GigabitEthernet0/45
  description testing cisco vlans
  switchport trunk encapsulation dot1q
  switchport trunk native vlan 6
  switchport trunk allowed vlan 306
  switchport mode trunk

It it helps. I do also have dot1q native vlan tagging enabled. I just 
can't see inside of the switch and understand where my frames are going. 
If I put it into switchport mode access, and switchport access vlan 6, 
it all works fine and I see mac addresses in the table.

	Any help would be appreciated.


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