Sep Configuration - Huawei Quidway S7700 Configuration Manual - Ethernet

Quidway S7700 Smart Routing Switch
Configuration Guide - Ethernet
About This Chapter
As a link layer protocol dedicated to Ethernet rings, SEP blocks redundant links on a network
to prevent logical loops.
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.
10.2 Configuring Basic SEP Functions
When there is no faulty link on a ring network running SEP, SEP can eliminate loops on the
Ethernet. When a link fault occurs on a ring network running SEP, SEP can immediately restore
the communication links between the nodes.
10.3 Specifying an Interface to Block
By default, the blocked interface is one of the last two interfaces that complete neighbor
negotiation. Sometimes, the negotiated blocked interface, however, may not be the expected
one. An interface can be selected to block as required.
10.4 Configuring SEP Multi-Instance
SEP multi-instance allows two SEP segments to be configured on a physical ring network. After
different protected instances are configured for the SEP segments and VLANs are mapped to
specified protected instances, load balancing and link backup can be implemented for service
traffic.
10.5 Configuring the Topology Change Notification Function
The function of advertising topology changes is configured on the device connecting a lower-
level network to an upper-level network. With this function, the device can notify the remote
device of topology changes of the lower-level and upper-level networks. After being notified of
these topology changes, all the devices on the network where the remote device resides delete
associated MAC addresses and ARP entry in time and relearn the MAC address of the remote
device. This ensures nonstop traffic forwarding.
10.6 Maintaining SEP
This section describes the commands for maintaining SEP, including the commands for clearing
SEP statistics.
Issue 01 (2011-07-15)
10
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.

SEP Configuration

10 SEP Configuration
485