Switching

Can anybody confirm if Bridge-domain or something equivalent is supported on the EX4200. I need to bridge a sub-interface (ge-0/0/22.113) to a physical interface (ge-0/0/23.0).

Thanks, Chris

Hi, 

From your request it seems like you've created L3 subinterfaces for ge-0/0/22, and now you want to do something like bridge-domains with IRB but on EX.

If so, then you'll have to move from subinterfaces to RVIs and in order to achieve this you'll have to do the following steps:

Make ge-0/0/22 as trunk port, include in members statemet all the Vlans that previosly were terminated on this interface:

ge-0/0/22 {
unit 0 {
family ethernet-switching {
port-mode trunk;
vlan {
members [...... Vlan113 ..... ];

}

Next you'll have to configure port ge-0/0/23 as access port:

interfaces {

ge-0/0/23 {

unit 0 {

family ethernet-switching {

port-mode access;

vlan {

members Vlan113;

}

}

}

}

}

After that you can create a Routed Vlan Interface(create an RVI for each previously configured subinterfaces):

set interfaces vlan unit 113 family inet address 10.10.10.1/24

Unfortunately its not that east (unless you have another suggestion), I have some overlapping vlans that are being fed to this switch (wan networks from upstream ISP's) so I don't control the vlan id's and thus have conflicts. I have two vlan id's of 113, and vlan.113 l3 interface is tied to the other vlan 113 🙂

I guess its time for an MX.....

Hi,

In this case it make sense to play with Vlan Translation on EX4200:

http://kb.juniper.net/InfoCenter/index?page=content&id=KB16755&cat=EX_SERIES&actp=LIST

The idea is to rewrite the vlans that comes from outside of your network with the value you want.

Thanks dpapana, I didn't realize that the EX 4200 could do that.