MSTP and Redundancy

[RedFoxie]

Hi All,

I've bought 3 GS108Tv2 switches of netgear and i am trying to setup MSTP for multiple VLAN's. But it is not working as i think it should, what i've have done is the following :



So, with no configuration what so ever i've created a loop, which is not good offcourse.

After that i've enabled Spanning-Tree with MSTP, and enabled the ports with Spanning-tree.

The looping problem is gone, but the second line between Switch1 and 3 is now in Blocking / Alternate status.
After that i've configured 3 MST id's one for each switch. That switch should become the Root bridge of the MST.

Switch 1 is the root of VLAN10 and VLAN20
Switch 2 is the root of VLAN80
Switch 3 is the root of VLAN50 and VLAN200

The bridge priority of the MST is set accordingly to 4096, 8192 and 16384

Next scheme should apply



All of the switches and links does have the VLANs created and tagged on the ports
But still the second line between Switch1 and 3 is in Blocking / Alternate status, no traffic is flowing whatsoever.

Can you help me with my setup?

Tnx in advance