Huawei quidway s7700 - Configuring MSTP Multi-Process; Establishing the Configuration Task

9.3 Configuring MSTP Multi-process
After an MSTP device binds its ports to different processes, the MSTP device performs the
MSTP calculation based on processes, and only relevant ports in each process take part in MSTP
calculation.
9.3.1 Establishing the Configuration Task
Before configuring MSTP multi-process, familiarize yourself with the applicable environment,
complete the pre-configuration tasks, and obtain the required data. This will help you complete
the configuration task quickly and accurately.
Applicable Environment
On the networking with both Layer 2 single-access rings and multi-access rings deployed,
switching devices bear both Layer 2 and Layer 3 services. To enable different rings to bear
different services, deploy MSTP multi-process. Spanning trees of different processes are
calculated independently and do not affect each other.
As shown in Figure 9-8, Switches A, B, and C are connected through Layer 2 links, and are all
enabled with MSTP. The CEs on the on rings support only STP/RSTP. Multiple access rings
exist and these rings access the MSTP region through different interfaces on Switches A and B.
Figure 9-8 Networking diagram of MSTP multi-process
SwitchA
SwitchB
SwitchC
PE1
PE2
CE
CE
CE
CE
CE
CE
Instance1:VLAN2~100
Instance2:VLAN101~200
Process 1
Process 2
Process 3
Instance3:VLAN201~300
Ring2
Ring1 Ring3
Quidway S7700 Smart Routing Switch
Configuration Guide - Ethernet 9 MSTP Configuration
Issue 01 (2011-07-15) Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
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