Huawei quidway s7700 Configuration Guide - Ethernet

10.1 SEP Overview
The Smart Ethernet Protection (SEP) protocol is a dedicated link layer protocol for use on
Ethernet rings. It boasts the high convergence speed, supports diverse topologies, and is able to
display the network topology on any device.
10.1.1 SEP Overview
SEP supports open-ring, closed-ring, single-ring, and multi-ring topologies and meets the
requirements of various topologies for redundant protection.
Introduction
Generally, redundant links are used on an Ethernet switching 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, the
communication quality deteriorates, and communication services may even be interrupted.
To solve the loop problem, Huawei datacom devices support the ring network protocols shown
in Table 10-1.
Table 10-1 Ring Network Protocol
Ring
Network
Protocol
Advantage Disadvantag
e
Deployment
Scenario
STP/RSTP/
MSTP
The Spanning Tree Protocol
(STP), Rapid Spanning Tree
Protocol (RSTP), and Multi-
Spanning Tree Protocol
(MSTP) are standard protocols
for breaking loops on Ethernet
networks. They are mature and
widely applied. Huawei
devices running one of them
can communicate with non-
Huawei devices.
The network
convergence
time is at the
second level,
which cannot
meet the
requirements
of some real-
time services.
The
convergence
time is
affected by the
network
topology.
They are applicable to
Layer 2 networks that
have a low requirement
on convergence time.
Quidway S7700 Smart Routing Switch
Configuration Guide - Ethernet 10 SEP Configuration
Issue 01 (2011-07-15) Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
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Huawei quidway s7700 Specifications

General

Brand	Huawei
Model	quidway s7700
Category	Network Router
Language	English