Juniper Switch Default vlan

Posted on 2014-08-23
Last Modified: 2014-08-28
Spare my ignorance with Juniper switches. I touched and played more cisco than junipers. Anyways, I have a Juniper 4200 EX series environment mix with 24 port and 48 port. My current vm infrastructure requires the default network to have a vlan tag of 1. I'm unsure what I have on my 4200 EX juniper switches but when I look at juniper cli viewer, "default" network has no vlan tagging. I can't seem to make this work on my virtualization with no vlan tag or ID even if I leave it empty on my virtualization environment, it can't work with untag network. The question is, can a juniper "default" network have vlan ID of "1"?
Question by:SuperRoot
    LVL 18

    Accepted Solution

    From the web interface goto Configure > Switching > vlan.

    You can edit the default Vlan and give it the tag 1. configure an IP address and then choose which ports you want to be a part of this VLAN.

    If you want multiple VLANs on an interface. You can set the interface to trunk mode then assign the interface to multiple VLANS.

    From the CLI I believe the steps are:

     set vlans <vlan-name> vlan-id <vlan#>
    set interfaces <interface> unit 0 family ethernet-switching vlan members <vlan#>
    set interfaces <interface> unit 0 family ethernet-switching port-mode <access or trunk>

    Hope that helps.
    LVL 1

    Author Comment

    If I make the change, do I need to setup encapsulation on my firewall? Will all vlan setup not able to talk to default vlan? It's the primary network in the environment, I'm really afraid to touch it unless I did all research. I'm afraid lots of server will not able to talk to other servers if I change it. Some guys says I should do native vlan ID instead of setting up just vlan.
    LVL 18

    Expert Comment

    by:Sanga Collins
    If not sure about the composition of the network, Another option would be to fix the ESXi servers configuration so that the VLAN tag one is not required. By default ESXi is network is not configured this way. I usually have to go in and create and tag ports before I can use VLANs.
    LVL 1

    Author Closing Comment

    Yeah we don't use esx. We use rhev 3.3 which by the way, is not as good as VMware. I'll close the ticket, it seems like there's a big chance we might cause disruption for default vlan.

    Featured Post

    Highfive Gives IT Their Time Back

    Highfive is so simple that setting up every meeting room takes just minutes and every employee will be able to start or join a call from any room with ease. Never be called into a meeting just to get it started again. This is how video conferencing should work!

    Join & Write a Comment

    Please see preceding article here: Figure 1 After Root Bridge has been elected, then what?..... Let's start by defining a Root Port in la…
    Join Greg Farro and Ethan Banks from Packet Pushers ( and Greg Ross from Paessler ( for a discussion about smart network …
    Viewers will learn how to properly install and use Secure Shell (SSH) to work on projects or homework remotely. Download Secure Shell: Follow basic installation instructions: Open Secure Shell and use "Quick Connect" to enter credentials includi…
    Get a first impression of how PRTG looks and learn how it works.   This video is a short introduction to PRTG, as an initial overview or as a quick start for new PRTG users.

    746 members asked questions and received personalized solutions in the past 7 days.

    Join the community of 500,000 technology professionals and ask your questions.

    Join & Ask a Question

    Need Help in Real-Time?

    Connect with top rated Experts

    19 Experts available now in Live!

    Get 1:1 Help Now