cancel
Showing results for 
Search instead for 
Did you mean: 
cancel
747
Views
0
Helpful
2
Replies

what is "native" option for dot1q

ashok_boin
Level 5
Level 5

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
2 Replies 2

guy.alexander
Level 1
Level 1

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

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

Getting Started

Find answers to your questions by entering keywords or phrases in the Search bar above. New here? Use these resources to familiarize yourself with the community: