[j-nsp] EX native-vlan-id for transmitting untagged frames?

Chuck Anderson cra at WPI.EDU
Wed Jul 22 18:59:36 EDT 2009

I'm trying to configure a port on an EX4200 to send tagged frames for 
1 or more VLANs, and untagged frames for the "native" VLAN.  For 

[edit interfaces ge-1/0/11]
unit 0 {
    family ethernet-switching {
        port-mode trunk;
        vlan {
            members [ 80 92 ];
        native-vlan-id 80;

In this example, I want VLAN 92 frames to be transmitted with an 
802.1q tag of 92, and VLAN 80 frames to be transmitted without any tag 
at all.

The documentation for "native-vlan-id" seems to suggest that the 
statement only affects received frames, not transmitted ones:

"Configure the VLAN identifier to associate with untagged packets 
received on the interface."

That is also my experience when testing this, although I haven't 
broken out the analyzer yet to see for sure.

Does anyone know of any workarounds I can use to make this work?  I 
have some braindead wireless bridges that can't be managed via tagged 
frames, but need to transport several VLANs.


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