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interoperate between PVST+ or MST (802.1s) and CST (802.1d) region?

Hi,

I am confused on interoperate between PVST+ and CST (802.1d) region or MST (802.1s) and CST (802.1d) region. Suppose I have access switch A with 2 VLANs redundantly connected to 2 distribution/core switches, B and C, in PVST+ or MST region. And I configure spanning tree to half of VLANs forward on each uplink, such as VLAN 100 through switch B and VLAN 200 through switch C. So, when I connect this region to CST region, which's spanning tree topology to operate within the CST region?

Please advice me.

Thanks for advance, Nitass

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