Switching

Hello All,

I hope you are doing well. I have a question regarding Juniper EX4200. 

I have an EX4200 with two port-mode trunk interfaces:

- one facing the customer where I receive many different vlans (10, 20, 30 and 40),

- another one facing a Juniper MX where the vlans are received in different subinterfaces according to the vlans.

Is there a way to do the following:

- Vlans 30 and 40 pass through as normal single tagged frames.

- Vlans 10 and 20 have to be encapsulated in another S-VLAN 100, and pass as VLAN 100 to the MX.

How could I configure this in the switch?

I tried configuring vlan 100 with dot1q-tunneling customer-vlans [ 10 20 ], but it won't work. Please take into account both interfaces are trunk.

I understand set ethernet-switching-options dot1q-tunneling ether-type 0x8100 should be configured, so that in the trunk with Juniper MX both single and dual tagged frames can be sent.

Thank you very much for your help

Hi,

Please refer to below tech pubs for more details in Q in Q

Understanding Q-in-Q Tunneling on EX Series Switches

Configuring Q-in-Q Tunneling (CLI Procedure)

You can also refer to below KB which has another example  :[KB13544]

EX-series Switch Q-in-Q tunneling configuration

Another Sample Config :

user@switch> show configuration vlans qinqvlan
vlan-id 4001 {
dot1q-tunneling {
customer-vlans [ 1-100 201-300 ];
}
user@switch> show configuration interfaces
ge-0/0/11 {
unit 0 {
family ethernet-switching {
port-mode trunk;
vlan members 4001;
}
}
}
ge-0/0/12 {
unit 0 {
family ethernet-switching {
port-mode access;
vlan members 4001;
}
}
}
ge-0/0/13 {
unit 0 {
family ethernet-switching {
port-mode access;
vlan members 4001;
}
}
}
ge-0/0/14 {
unit 0 {
family ethernet-switching {
port-mode trunk;
vlan members 4001;
}
}
}
user@switch> show ethernet-switching-options
dot1q-tunneling {
ether-type 0x9100;
}

VLAN: qinqvlan, Created at: Thu Sep 18 07:17:53 2008
802.1Q Tag: 4001, Internal index: 18, Admin State: Enabled, Origin: Static
Dot1q Tunneling Status: Enabled
Customer VLAN ranges:
                     1-100
                     201-300
Protocol: Port Mode
Number of interfaces: Tagged 2 (Active = 0), Untagged  4 (Active = 0)
      ge-0/0/11.0, tagged, trunk
      ge-0/0/14.0, tagged, trunk
      ge-0/0/12.0, untagged, access
      ge-0/0/13.0, untagged, access

Hello.

Thank you for your response. Unfortunately, the links you provide are for basic qinq, and the configuration is also a single qinq vlan on a single interface, which is not the case I described.

Regards.

Hi,

Have you gone through the KB I have shared?

https://kb.juniper.net/InfoCenter/index?page=content&id=KB13544

Let me know what is the difference you have in requirement and the example listed in KB.

[KUDOS PLEASE! If you think I earned it!

If this solution worked for you please flag my post as an "Accepted Solution" so others can benefit..]

The KB is basic qinq config, one qinq vlan in one interface. The requirement is clearly explained in my initial post: single tagged vlans and vlans that need to be encapsulated in qinq, both received on the same trunk interface.

Hi,

Did you find answer to your problem? I have the same case on my network.

Regards.