Trunk between Cisco 3560 and Juniper ex4200

Unanswered Question
Nov 9th, 2011

I need to create a trunk between a Cisco 3560 and a Juniper EX4200

I am perfectly happy with the the Cisco side and want to only allow 1 vlan across the trunk, which I was going to configure on the 3560 side.

Has anyone any experience on trunking to a Juniper Ex4200

Looking at the Juniper side it looks like I just set the port as a L2 uplink.



I have this problem too.
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Reza Sharifi Wed, 11/09/2011 - 07:03

You can allow certain vlan(s) on the trunk by using the memeber command:

here is the command:

user@switch1> show configuration

interfaces {

ge-0/0/13 {

unit 0 {

family ethernet-switching {

port-mode trunk;

vlan {

members [10 20 30 40];


Giuseppe Larosa Wed, 11/09/2011 - 08:57

Hello Roger,

EX-4200 are multi layer switches. The most important difference is that Vlans/broadcast domains have names and need to be associated to an 802.1Q Vlan-id.

the following commands can be of help

ex-4200> configure

ex-4200# set vlans INTER-SWITCH vlan-id 100

ex-4200# set interface ge-0/0/0 unit 0 family ethernet-switching port-mode trunk

ex-4200# set interface ge-0/0/0 unit 0 family ethernet-switching vlan members INTER-SWITCH



the default is that no vlans are allowed on the trunk on the EX-4200. multilple Vlans can be permitted by using the last command that refers to the vlan object name and not the to the 802.1Q vlan-id

commit is required to apply the change in junos

Hope to help



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