Example For Configuring A Hybrid Sep+Mstp Ring Network - Huawei AR530 series Configuration Manual

Huawei AR530&AR550 Series Industrial Switch Routers
Configuration Guide - Ethernet Switching
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8.7.3 Example for Configuring a Hybrid SEP+MSTP Ring Network

Networking Requirements
Generally, redundant links are used to connect an Ethernet switching network to an upper-layer
network to provide link backup and enhance network reliability. The use of redundant links,
however, may produce loops, causing broadcast storms and rendering the MAC address table
unstable. As a result, communication quality deteriorates, and services may even be interrupted.
SEP can be deployed on the ring network to eliminate loops and restore communication if a link
fault occurs.
As shown in
and multiple Layer 3 devices form a ring at the aggregation layer. The two devices where the
access layer and the aggregation layer are intersected do not support SEP. You can configure
SEP at the access layer to implement redundancy protection switching and configure the
topology change notification function on an edge device in a SEP segment. This function enables
an upper-layer network to detect topology changes in a lower-layer network in time.
Issue 01 (2014-11-30)
#
sep segment 3
control-vlan 30
protected-instance 0 to 4094
#
interface GigabitEthernet7/0/1
port hybrid tagged vlan 30 100
stp disable
sep segment 3
#
interface GigabitEthernet7/0/2
port hybrid tagged vlan 30 100
stp disable
sep segment 3
#
return
Configuration file of CE1
#
sysname CE1
#
vlan batch 100
#
interface GigabitEthernet7/0/1
port hybrid tagged vlan 100
#
return
Configuration file of CE2
#
sysname CE2
#
vlan batch 200
#
interface GigabitEthernet7/0/1
port hybrid tagged vlan 200
#
return
NOTE
In this example, devices at the aggregation layer run the MSTP protocol.
Figure 8-17, multiple Layer 2 switching devices form a ring at the access layer,
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8 SEP Configuration
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