[j-nsp] Multiple VLANs on single M7i FastE port

[Jesus Alvarez]

Hi,

Has anyone used multiple VLANs on a FastE port in the M series routers 
(like the PE-4FE-TX on the M7i)? I tried a configuration similar to the 
one below and connected it to a trunk port on an EX switch. 
Unfortunately, the subinterfaces can not communicate with other devices 
on that switch with the same vlan-ids.

If I configure each subnet on a separate FastE port without using 
vlan-tagging and then connect them to access ports on the switch for 
each vlan-id, it does work. Yet that limits the number of VLANs to the 
number of ports available.

I consulted with the JTAC but they seem to be confusing the issue with a 
default-vlan problem. Any suggestions would be appreciated.

Note that the FastE ports on the M series router do not support 
flexible-vlan-tagging. There is also no ethernet-switching fuctionality 
like in the MX series.

Thanks!
----------
     fe-0/0/3 {
         description "VLAN Aggregation";
         vlan-tagging;
         speed 100m;
         link-mode full-duplex;
         unit 300 {
             vlan-id 300;
             family inet {
                 address 10.0.0.0/24;
             }
         }
         unit 301 {
             vlan-id 301;
             family inet {
                 address 10.0.1.0/24;
             }
         }
         unit 302 {
             vlan-id 302;
             family inet {
                 address 10.0.2.0/24;
             }
         }
     }