Raisecom
ISCOM2600G-HI (A) Series Configuration Guide
Raisecom Proprietary and Confidential
Copyright © Raisecom Technology Co., Ltd.
Figure 2-17 Networking with multiple spanning trees instances in MST region
Apply MSTP to the network as shown in Figure 2-17. After calculation, there are two
spanning trees generated at last (two MST instances):
MSTI 1 takes B as the root switch, forwarding packet of VLAN 100.
MSTI 2 takes F as the root switch, forwarding packet of VLAN 200.
In this case, all VLANs can communicate internally, different VLAN packets are forwarded in
different paths to share loading.
2.7.2 Preparation for configuration
Scenario
In a big LAN or residential region aggregation, the aggregation devices make up a ring for
link backup, avoiding loop and realizing load balancing. MSTP can select different and
unique forwarding paths for each one or a group of VLANs.
Prerequisite
N/A
2.7.3 Default configurations of MSTP
Default configurations of MSTP are as below.
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