Cisco Support Community
cancel
Showing results for 
Search instead for 
Did you mean: 
Announcements
Webcast-Catalyst9k
Bronze

what is "native" option for dot1q

Dear all,

What is the main usage of "native" option for dot1q encapsulation at router interface conf mode for trunking.

What is meant by exactly "native" lan?

Thanks in advance...

Regards...

Ashok.

With best regards... Ashok ----------- Pls kindly rate if helpful or answered your question.
2 REPLIES
New Member

Re: what is "native" option for dot1q

when you are configuring dot1q subinterfaces on a router , the router receives a dot1q tagged frame with a vlan id and then the subinterface with the same vlan id receives it , but what happens if the router receives a regualr frame

that isnt tagged the router needs to know on what subinterface this frame should land so the native option does this it tells the router that this subinterface should get the frame.

so to summarize the native option tells the router what subinterface to use when no 802.1q tag is received.

but dont worry when you are sending frames from the subinterface with the native option the frame will be tagged with dot1q ,

another important thing is make sure the native vlan on the router is the same as the native vlan on the switchport that the router is connected to.

guy

New Member

Re: what is "native" option for dot1q

Chk this out: it says frames in native vlan are transmitted and received untagged.

http://www.cisco.com/univercd/cc/td/doc/product/l3sw/4908g_l3/ios_12/18w522a/config/vlancnfg.htm

527
Views
0
Helpful
2
Replies
CreatePlease to create content