Huawei quidway s7700 - Rings; Example for Configuring MSTP Multi-Process for Layer 2 Single-Access Rings and Layer 2 Multi-Access Rings

9.8.3 Example for Configuring MSTP Multi-Process for Layer 2
Single-Access Rings and Layer 2 Multi-Access Rings
MSTP multi-process enables different Layer 2 access rings to transmit different services.
Networking Requirements
On the network with both Layer 2 single-access rings and multi-access rings deployed, switching
devices transmit both Layer 2 and Layer 3 services. To enable different rings to transmit different
services, configure MSTP multi-process. Spanning trees of different processes are calculated
independently.
As shown in Figure 9-11, both Layer 2 single-access rings and dual-access rings are deployed
and switches A and B carry both Layer 2 and Layer 3 services. In this networking, switches A
and B connected to dual-access rings are also connected to a single-access ring.
NOTE
In the ring where MSTP multi-process is configured, you are advised not to block the interface directly
connected to the root protection-enabled designated port.
Figure 9-11 Networking for MSTP multi-process for Layer 2 single-access rings and multi-
access rings
SwitchA
SwitchB
SwitchC
PE1
PE2
CE
CE
CE
CE
CE
CE
GE1/0/5 GE1/0/5
GE1/0/1
GE1/0/1
GE1/0/4
GE1/0/4
GE1/0/3 GE1/0/3
GE1/0/2 GE1/0/2
Instance2:VLAN101~200
Region name:RG1
Process 1
Process 2
Process 3
Network
Instance1:VLAN2~100
Instance3:VLAN201~300
Configuration Roadmap
The configuration roadmap is as follows:
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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