FibroLAN Falcon Gen-3 M-Class, Руководство пользователя

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Falcon M-Class | User Guide
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VLANs in the region except those VLANs assigned to MSTI.
In all µFalcon models, the IST instance is not supported. The CISTI performs the functions of
the IST instance
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Multiple Spanning Tree Instance (MSTI). This type of configurable STP instance includes
assigned VLANs which operate as part of the same single spanning tree topology. IST
instance is defined as Instance 0 whereas all other MST instances are numbered from 1 to
15.
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All MST instances within the same region share the same protocol timers , each MST
instance has its own topology Parameters, such root switch ID, root path cost and
additional selected Parameters.
Common and Internal Spanning Tree (CSTI):
is a collection of the IST in each region and the Common Spanning Tree (CST) which interconnects
the various MST regions and STP LANs, and RSTP LANs in a switched network.
The CIST is created as a result of the STP algorithm running between switches that support the
802.1w, and the 802.ID protocols. MSTP allows for rapid port state transition just like RSTP. MSTP is
compatible to STP and RSTP
Example of a Multiple Spanning Tree Application
Assume we have tree switches in a region configured with VLANs grouped in two instances, as
follows:
VLAN1 (10, 20, 30) mapped to Instance 1; VLAN2 (11, 21, 31) mapped to Instance 2
The logical topologies shown in the below drawing are the result from the these VLAN/Instance
grouping resulting on different blocked links for different VLANs as shown.
The MSTP configuration commands operate exactly like RSTP commands and MSTP is compatible
with the RSTP and STP enable switches in our network.
MSTP Network
MSTP interconnects between various MST regions and maps active and separate paths through
separate spanning tree instances. The below drawing depicts an MSTP network
MSTP distinguish an STP or RSTP LAN as a distinct separate STP region