Configuring Nonstop Software Upgrade (Cli Procedure) - Juniper JUNOS OS 10.4 - FOR EX REV 1 Manual

Configuring Nonstop Software Upgrade (CLI Procedure)

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Copyright © 2010, Juniper Networks, Inc.
You can use nonstop software upgrade (NSSU) to upgrade the software running on
EX8200 switches with redundant Routing Engines. NSSU allows you to upgrade both
Routing Engines with a single command and with minimal disruption to network traffic
during the upgrade. To reduce the time an NSSU takes, you can configure line-card
upgrade groups.
In its default configuration, NSSU upgrades each line card one at a time. Traffic continues
to flow through the other line cards while a line card is being restarted as part of the
upgrade. This behavior allows you minimize disruption to traffic by configuring link
aggregation groups (LAGs) such that the member links of each LAG reside on a different
line cards. When one member link of a LAG is down, the remaining links are up, and traffic
continues to flow through the LAG.
You can reduce the time it takes to perform an NSSU by configuring line-card upgrade
groups. Instead of being upgraded sequentially, the line cards in an upgrade group are
upgraded at the same time. To achieve minimal traffic disruption, you must define the
line-card upgrade groups such that the member links of the LAGs reside on line cards
that are in different upgrade groups. For information on how to configure LAGs, see
"Configuring Aggregated Ethernet Interfaces (CLI Procedure)" on page 1330.
To configure line-card upgrade groups:
An upgrade group that contains a single line card:
[edit chassis]
user@switch# set nssu upgrade-group group-name fpcs slot-number
For example, to configure an upgrade group called
in slot 5:
[edit chassis]
user@switch# set nssu upgrade-group group3 fpcs 5
An upgrade group that contains more than one line card:
[edit chassis]
user@switch# set nssu upgrade-group group-name fpcs [list-of-slot-numbers]
For example, to create an upgrade group called
slots 1, 4, and 7:
[edit chassis]
user@switch# set nssu upgrade-group primary fpcs [1 4 7]
Example: Configuring Nonstop Software Upgrade on EX Series Switches on page 1186
Upgrading Software Using Nonstop Software Upgrade (CLI Procedure) on page 1197
Understanding Nonstop Software Upgrade on EX Series Switches on page 1176
Chapter 52: Configuring High Availability
group3 that contains the line card
that contains the line cards in
primary
1193