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Same VLAN across switches in different MST Regions

Clement BONNAL
Level 1
Level 1

Hello,

I have 3 MST Regions with different instance/vlan mappings.

However, some vlan-ID are common in different regions.

For example : vlan 10, instance 1, region A & vlan 10, instance 3, region B

If I connect two switches in different regions, and trunking vlan 10, what is the comportment ?

If I put a station in vlan 10 in region A and a station in vlan 10 in region B, are they able to ping themselves across same broadcast domain ?

Regards,

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