Configuring Resilient Ethernet Protocol; Restrictions For Resilient Ethernet Protocol - Cisco ASR 900 Series Configuration Manual

Configuring Resilient Ethernet Protocol

Note This chapter is not applicable for Cisco ASR 900 RSP3 Module.
The Resilient Ethernet Protocol (REP) is a Cisco proprietary protocol that provides an alternative to the
Spanning Tree Protocol (STP). REP provides a way to control network loops, handle link failures, and
improve convergence time. It controls a group of ports connected in a segment, ensures that the segment
does not create any bridging loops, and responds to link failures within the segment. REP provides a basis
for constructing complex networks and supports VLAN load balancing.
The convergence value is improved from Cisco IOS XE 3.17 release.
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Restrictions for Resilient Ethernet Protocol

• You must configure each segment port; an incorrect configuration can cause forwarding loops in networks.
• REP can manage only a single failed port within the segment; multiple port failures within the REP
• You should configure REP only in networks with redundancy. Configuring REP in a network without
• Use LSL timers greater than 280mseconds to avoid REP flaps with IGMP snooping.
• Use LSL timers of 520mseconds to avoid REP flaps.
Restrictions for Resilient Ethernet Protocol, page 9
Information About REP, page 10
How to Configure REP, page 18
Configuration Examples for REP, page 32
Additional References, page 34
Feature Information for Resilient Ethernet Protocol, page 35
segment causes high loss of network connectivity.
redundancy causes loss of network connectivity.
LAN Switching Configuration Guide Cisco IOS XE Everest 16.5.1 (Cisco ASR 900 Series)
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