Upgrading Software - Dell PowerConnect J-EX4200-24T Software Manual

Dell PowerConnect J-Series Ethernet Switch Complete Software Guide for Junos OS

Upgrading Software

Upgrading Software Using Automatic Software Download on J-EX Series Switches
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82
Understanding System Snapshot on J-EX Series Switches on page 64
Upgrading Software Using Automatic Software Download on J-EX Series
Switches on page 82
The automatic software download feature uses the DHCP message exchange process
to download and install software packages. You configure the automatic software
download feature on J-EX Series switches acting as DHCP clients. You must enable
automatic software download on the J-EX Series switch before the software upgrade
can occur.
You configure a path to a software package file on the DHCP server. The server
communicates the path to the software package file through DHCP server messages.
If you enable automatic software download, the DHCP client J-EX Series switch compares
the software package name in the DHCP server message to the name of the software
package that booted the switch. If the software packages are different, the DHCP client
J-EX Series switch downloads and installs the software package specified in the DHCP
server message.
Before you upgrade software using automatic software download, ensure that you have
configured DHCP services for the switch, including configuring a path to a boot server
and a boot file. See the Junos OS System Basics Configuration Guide at
http://www.juniper.net/techpubs/software/junos/
configure DHCP services and settings. See "Configuring DHCP Services (J-Web
Procedure)" on page 447 for information about using the J-Web interface to configure
DHCP services and settings.
To enable automatic software download on a J-EX Series switch acting as a DHCP client:
[edit chassis]
user@switch# set auto-image-upgrade
Once automatic software download is enabled on your DHCP client J-EX Series switch
and once DHCP services are enabled on your network, an automatic software download
can occur at any time as part of the DHCP message exchange process.
If an automatic software download occurs, you see the following message on the switch:
Auto-image upgrade started
On successful installation system will reboot automatically
The switch reboots automatically to complete the upgrade.
Verifying That Automatic Software Download Is Working Correctly on page 87
Understanding Software Installation on J-EX Series Switches on page 61
DHCP Services for J-EX Series Switches Overview on page 445
for information about using the CLI to