Hi so yesterday I wanted to test out some network equipment. I had previously done this testing a month or two ago and it worked fine. however either i'm running into a bug or i'm not setting it up correctly.
I have 2 Ex4200's both 48 port.
Switch 1 is the " Distribution Switch" It has one trunk port 0 that leads to a sonicwall nsa2650. this trunk caries all customer vlans. IE vlan101 thru vlan125. The vlans are separate from each other so no vlans can communicate, this is handled at the sonicwall level with firewall rules.
All the other Ports on Switch 1 are also trunk ports. For example Port 1 goes to Rack1, Which for example sake could contain vlan101 and vlan102.
port 2 on switch 1 goes to rack2 and could contain whatever customer is located on that rack.
Ok so Switch 2 is basically any switch that sits at the rack level. We have 16 racks so each rack gets one switch the each trunks back to switch 1 to the appropriate port.
Lets focus on Switch 2 that goes to rack one. Port 0 on Switch 2 Rack 1 trunks back to Switch 1 Port 1. This trunk handles vlan101 and vlan102.
Ports 1-5 are access ports for vlan101
ports 6-10 are access for vlan 102.
to me this seems like it all should work, Trunk from sonicwall to SW1 carrying vlan101 and 102. Port 1 Trunked to SW2R1 on port 0. Access ports on SW2R1 for client machines.
However it doesn't and I cant seem to figure out why, I had tested it months ago and it worked perfect.
So I said ok lets take out Switch 2 and just try to accomplish this off switch 1 to see if my vlans are even making it from there to the sonicwall. So I left port 0 on Switch1 as the trunk to the sonicwall, Port1 as an access for vlan101 and port 2 as an access for vlan102.
plug my laptop into port1, perfect obtain ip in vlan101 range
plug into port2, again perfect obtain ip in vlan102 range.
So I know that the vlans are working from sonicwall to switch1
But when I add in the 2nd switch I don't get anything.
Anyone have any ideas? I don't have the switches with me right now so I cant post the config file, I also don't remember the exact version of junos they are running. I think its 12. something. Also both of these switches are running the same version of junos and I factory reset them to see if that eliminated problems, it did not 
Any help is appreciated!!