cancel
Showing results for 
Show  only  | Search instead for 
Did you mean: 

Dry VLAN possible?

SOLVED
Highlighted
Here to help

Dry VLAN possible?

Hi,

  Maybe a silly question but I am trying to accomplish a "dry" VLAN on a Meraki MX/MS setup.  By Dry I mean i'd like to assign ports to a VLAN and have traffic pass between those ports and devices connected to them but was hoping to not have to set an MX IP address or address scope.  Essentially having no interaction with Meraki MX, just a virtual cable if you will.

 

Regards,

-m

1 ACCEPTED SOLUTION

Accepted Solutions
Highlighted
Kind of a big deal

Re: Dry VLAN possible?

This is an example of one I have done.  I tend to make the third tuple equal to the VLAN number.

 

1.PNG

'

 

View solution in original post

10 REPLIES 10
Highlighted
Head in the Cloud

Re: Dry VLAN possible?

Yes you can. You are forced to assign an IP but do not have to use it or enable DHCP on the VLAN. If I understand correctly you might want to just make a new VLAN and then assign it to a couple of ports set to access mode. You could create a 2 or 3 port switch this way with nothing routing through the MX assuming you don’t route anything to the VLAN IP. 

Highlighted
Kind of a big deal

Re: Dry VLAN possible?

I have used auto-conf addresses when doing this in the past (169.254.x.x/30).  This class of addresses are link-local and non-routable.

Highlighted
Here to help

Re: Dry VLAN possible?

I like the idea of using a auto-conf address but i get an error when I try to save it.  It says the MX IP address is not in the subnet.

 

 

Screen Shot 2020-01-30 at 6.56.08 PM.png

Highlighted
Kind of a big deal

Re: Dry VLAN possible?

This is an example of one I have done.  I tend to make the third tuple equal to the VLAN number.

 

1.PNG

'

 

View solution in original post

Highlighted
Getting noticed

Re: Dry VLAN possible?


@ely105 wrote:

I like the idea of using a auto-conf address but i get an error when I try to save it.  It says the MX IP address is not in the subnet.

 

 

Screen Shot 2020-01-30 at 6.56.08 PM.png


The error is coming from the flipped numbers in the MX  IP, you have 196, should be 169. 

Highlighted
Here to help

Re: Dry VLAN possible?

wow, rookie mistake. I stared at that several times too. Thanks for the catch.
Highlighted
Here to help

Re: Dry VLAN possible?

Thanks Brandon!  I figured that might work, and I think that coupled with the autoconfig address it makes it a bit more "dark/dry" to Meraki. 

Highlighted
Kind of a big deal

Re: Dry VLAN possible?

You said you have a switch? Does the traffic actually have to transit the MX in order to do what you need it to do?

 

i.e. is it just internal or does it need to go out. If it doesn't need to go out, and all the ports are of the MS...

Highlighted
Here to help

Re: Dry VLAN possible?

All the ports would be on the MS or multiple MS's.  So it doesn't really need to traverse the MX

Highlighted
Building a reputation

Re: Dry VLAN possible?

If all on the MS, just set the ports to a unique vlan. No MX config required. Just make sure you add that new vlan to the trunks.

I do this at hotels all the time. They never make L3 changes, just add some made up vlan to the ports I need and trunk it for me
Welcome to the Meraki Community!
To start contributing, simply sign in with your Cisco account. If you don't yet have a Cisco account, you can sign up.