Mstp Structure - HP ProCurve 5300xl Series Management Manual

MSTP Structure

MSTP maps active, separate paths through separate spanning tree instances
and between MST regions. Each MST region comprises one or more MSTP
switches. Note that MSTP recognizes an STP or RSTP LAN as a distinct
spanning-tree region.
MST Region
IST
Instance
MSTI
(Optional)
MSTI
(Optional)
Switch
Running RSTP
Switch
Running RSTP
Figure 6-25. Example of MSTP Network with Legacy STP and RSTP Devices
Connected
Common and Internal Spanning Tree (CIST): The CIST identifies the
regions in a network and administers the CIST root bridge for the network,
the root bridge for each region, and the root bridge for each spanning-tree
instance in each region.
Common Spanning Tree (CST): The CST administers the connectivity
among the MST regions, STP LANs, and RSTP LANs in a bridged network.
802.1s Multiple Spanning Tree Protocol (MSTP)
Common and Internal Spanning Tree (CIST)
Common Spanning Tree (CST)
Switch
Running RSTP
Spanning-Tree Operation
Switch
Running STP
Switch
Running STP
Switch
Running STP
MST Region
IST
Instance
MSTI
(Optional)
MSTI
(Optional)
MSTI
(Optional)
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