Chapter 51 Examples Of High Availability Configuration; Example: Configuring Nonstop Active Routing On Ex Series Switches - Juniper JUNOS OS 10.4 - FOR EX REV 1 Manual

CHAPTER 51
Examples of High Availability
Configuration

Example: Configuring Nonstop Active Routing on EX Series Switches

Requirements
Overview and Topology
Copyright © 2010, Juniper Networks, Inc.
Example: Configuring Nonstop Active Routing on EX Series Switches on page 1183
Example: Configuring Nonstop Software Upgrade on EX Series Switches on page 1186
Nonstop active routing (NSR) provides high availability for Routing Engines by enabling
transparent switchover of the Routing Engines without necessitating restart of supported
routing protocols. Both Routing Engines are fully active in processing protocol sessions,
and so each can take over for the other. The switchover is transparent to neighbors.
This example describes how to configure nonstop active routing on switches with multiple
Routing Engines:
Requirements on page 1183
Overview and Topology on page 1183
Configuration on page 1184
Verification on page 1185
Troubleshooting on page 1185
This example uses the following hardware and software components:
An EX Series switch with multiple Routing Engines
Junos OS Release 10.4 or later for EX Series switches
Configure nonstop active routing on any EX Series switch with multiple Routing Engines
or EX Series switch in a Virtual Chassis configuration. Nonstop active routing is
advantageous in networks where neighbor routing devices do not support graceful restart
protocol extensions.
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