we have several cisco ce520-24pc-k9 access switches that all have two uplink connections to two HP Procurve 54012zl edge switch (one uplink to every HP switch).
But the ce520 is standard using PVST+ as a spanning tree protocol, but the HP use Multiple Spanning Tree (MST).
What now happens that one of the two Gi ports falls in error ( unknown ST BPDU's).
The manual of the cisco ce520 says that the following Spanning Tree protocol are supported
â¢ Per VLAN Spanning Tree
â¢ Per VLAN Spanning Tree Plus
â¢ Per VLAN Rapid Spanning Tree Plus
Is there a solution so my spanning tree will work between the cisco and HP device?