3Com VCX V7000, Maintenance Manual

Page: 309 / 344

Downgrading from 7.1.y to 7.1.x 309
The examples in this procedure use the assumption that upgrading from
version 7.1.x to 7.1.y changed the operating system version from 4.2.0 to
4.2.1.
1 Log in as root .
2 To determine which operating system versions are available, enter this
command:
vcx-os-query
The output from this command appears:
OS Version Partition Label Status
A 4.2.0 /dev/hda2 /A
B 4.2.1 /dev/hda3 /B active
The operating system versions that you see may vary from the example
shown.
The order of the A and B versions may be reversed depending on the
upgrade history of the system.
When you are downgrading, use the earlier of the two operating system
versions in this command:
vcx-os-switch 4.2.0
To confirm that you have selected the operating system version that you
want, repeat the
vcx-os-query
command. Verify that the word
“selected” appears in the Status column for the version that you want.
Example:
OS Version Partition Label Status
A 4.2.0 /dev/hda2 /A selected
B 4.2.1 /dev/hda3 /B active
Reboot the Server
Reboot the system using this command:
reboot
When the system reboots, it starts VCX 7.1. x services.
Downgrading a
Multiple-Site System
(7.1.y to 7.1.x)
For VCX systems that are installed at multiple sites, upgrades and
downgrades must be performed using a specific sequence of servers, as
described in this section.
CAUTION: Back up all databases before beginning an upgrade.