asked on

Tag Native VLAN on Cisco 2801

Hi

We have two Cisco 2801 that connects two offices.

We where running the traffic over serial interface but now we got a new provider of the comunication line. They could only deliver a line with TCP/IP so we had to change to fast ethernet on both routers.

They say that we have to tag the native VLAN 1 traffic over the line.
Must we use Trunks or Subinterfaces or what?

We have tried to change the configuration with no success.

How do we set this up correctly ?

The cisco 2801 is running 12.4(16a).

Nayyar HH (CCIE RS)

If they say you should tag vlan 1 then use sub-interfaces

Check your device can support the configurations below; Its the latter config you need to support

Traffic sent across VLAN1 below is NOT tagged

interface FastEthernet0/0.1
encapsulation dot1Q 1 native

Traffic sent across VLAN1 below is tagged

interface FastEthernet0/0.1
encapsulation dot1Q 1

IntesyNordic

ASKER

The router adds native by itself when we enter the command encapsulation dot1Q 1.
We can't see any other commands in the running-config that have any effect on this.

Any ideas?

SOLUTION

Nayyar HH (CCIE RS)

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ASKER CERTIFIED SOLUTION

IntesyNordic

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IntesyNordic

ASKER

I've requested that this question be closed as follows:

Accepted answer: 0 points for IntesyNordic's comment #37806271

for the following reason:

Feedback answer.

Nayyar HH (CCIE RS)

Post ID: 37805833 provides a solution/workaround - some points should be awarded for this post at least

IntesyNordic

ASKER

Sorry about that, I'am new to this. How do i set points.

Nayyar HH (CCIE RS)

No problem - I think you should have the option of accepting a post as the solution and then awarding points