Juniper Switch Default vlan

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"?
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Sanga CollinsSystems AdminCommented:
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.

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SuperRootAuthor Commented:
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.
Sanga CollinsSystems AdminCommented:
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.
SuperRootAuthor Commented:
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.
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