SG350X vlan problem

[richardjunger]

Hello, i have double conected my switch sg350X from switch1.

In sg350X i have ports 1-10 in VLAN 1 and ports 11-20 in VLAN 2.

In ports 1 and 11 i have uplink from switch1. But here is problem: ports working only 1-10 but ports 11-20 in VLAN 2 doesnt work and in spanning tree i see port 11-uplink  as backup.... 

Why its showing backup when it is in another VLAN...?

Help me pls with it i need working both ports...

Thanks.

[balaji.bandi]

how is these 2 links connected to uplink, and  what is devices other side port 1 and port 11 ?

[richardjunger]

My case:
I have four floors and in every floor is switch connected to main rack by two utp.

In main rack i have router and switch.

I have two subnets - in main rack i have splited switch: GE1-GE12 -VLAN10 and GE13-GE24 -VLAN20

This two VLANs i have connected to router:

192.168.60.X - from router to GE1

192.168.70.X - from router to GE13

Its mean when i connect to GE2 i get IP from subnet 192.168.60.X.

When i connect to GE14 i get IP from subnet 192.168.70.X.

Its work perfect but i have probllem with switches in floors.

In floors i have splited switches as well main switch in main rack.

Its mean: For example first floor:

Switch is splitted GE1-GE12 -VLAN10 and GE13-GE24 -VLAN20

GE1 is connected to main switch to port GE2 (subnet: 192.168.60.X)

GE13 is connected to main switch to port GE14 (subnet: 192.168.70.X)

And here is probllem in floor switch work only GE1-GE12 (subnet 192.168.60.X) GE13-GE24 (subnet: 192.168.70.X) doesnt work - i dont get IP. And in spanning tree its showing GE13 as backup port WHY? when its different VLAN. 

(Yes its work when i turn off spanning tree)

Need help pls.

[balaji.bandi]

I assume these ports configured differently - that is the reason spanning tree kick off make it as alternative link.

best suggest between main switch to floor switch make it as Port-channel ( so you have redundancy and allow VLAN 10 and 20 in that)

GE1 / GE 13 --- Port-channel ----- GE2 / GE14   ( allowed VLAN 10, 20)

Disable Spanning-tree not the best practice.

[richardjunger]

Thank you very much.

But as port chanel you mean LAG (link aggregation)....?

[balaji.bandi]

Yes please.

[richardjunger]

---

And btw. is it possible double connected switch in another vlan without blocking one of them port...?

[balaji.bandi]

what you mean double connected ? explain more ?

[richardjunger]

For example i have two same switches.

Both switches splited like: 

GE1-GE12 VLAN1

GE13-GE24 VLAN2

Connected by UTP: From: SW1 GE1 to SW2 GE1 (from VLAN1 to VLAN1)

Connected by UTP: From: SW1 GE13 to SW2 GE13 (from VLAN2 to VLAN2)

I know i can use LAG and trunk for transfering this two VLAN but is it possible transfer by this double connection (one UTP transfering VLAN1) (seccond UTP transfering VLAN2)

Because when i connected like this its doesnt work. Only one VLAN work seccond its marked BACKUP.

Both VLANS are configured - all ports access untaged but i thing problem is when i double connect ports between switches SWITCH to TRUNK i dont know why its switching to TRUNK when i set acces...

[richardjunger]

Here is pictures of my configuration. 
Switch 2 blocking i absolutely don't know why... :-(