Page 1 of 2

VLAN re-writing

Posted: Tue Jan 19, 2016 6:40 pm
by mhoppes
I think the answer is no, but is there a way to re-write a VLAN on the switches?

So say I have 4 VLANs that come in on Port1 (2,3,4,5)

I want to put these VLANs on Port3, but I need them to come out as (2,3,4,6). Is there a way to mangle VLAN 6 and 5 together in the switch?

Re: VLAN re-writing

Posted: Tue Jan 19, 2016 6:53 pm
by sirhc
mhoppes wrote:I think the answer is no, but is there a way to re-write a VLAN on the switches?

So say I have 4 VLANs that come in on Port1 (2,3,4,5)

I want to put these VLANs on Port3, but I need them to come out as (2,3,4,6). Is there a way to mangle VLAN 6 and 5 together in the switch?


Umm no, the switch can not rewrite/change the VLAN ID it is handed

Re: VLAN re-writing

Posted: Tue Jan 19, 2016 7:26 pm
by mhoppes
Too bad. But that's what I figured.

Re: VLAN re-writing

Posted: Wed Jan 20, 2016 12:34 am
by adairw
That's what routers are for :)

Re: VLAN re-writing

Posted: Wed Jan 20, 2016 12:43 am
by mhoppes

Re: VLAN re-writing

Posted: Wed Jan 20, 2016 2:52 pm
by mike99
You could 2 unuse port with a patch cable between them, one untag at VLAN 5 and the other untag at VLAN 6 so you can do it at the cost of 2 ports. Since it's so rarely use (maybe when merging 2 networks ?), I think it do the job to just use a switch with more ports.

Re: VLAN re-writing

Posted: Wed Jan 20, 2016 3:01 pm
by sirhc
Our switch core is capable of VLAN mapping but this feature is very rarely needed and where as I am not saying maybe someday I just would not want to say when and for sure of we implement it.

Mike's suggested should work, I agree with his solution.

Re: VLAN re-writing

Posted: Wed Jan 20, 2016 3:03 pm
by mhoppes
That works and this site is a light port. Thanks.

Re: VLAN re-writing

Posted: Fri Jan 22, 2016 1:34 am
by adairw
Learn something new every day!

Re: VLAN re-writing

Posted: Tue Dec 05, 2017 1:48 pm
by swang2002
Curious is vlan translation has been given any more thought. I have a few use cases for it.