Medias Mediatrix 1204, Справочное руководство

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Software Downgrade Reference Manual (SIP Version)
Mediatrix 1204 183
Software Downgrade
It is possible to downgrade a Mediatrix 1204 from the current version (for instance, v5.0rx.x) to an older version
(for instance, v4.4rx.x).
X
To perform a software downgrade:
1. Create, in a common folder under the TFTP root path, the current (for instance, v5.0) and older (for
instance, v4.4) applications folders.
2. Re-update the Mediatrix 1204 with the current application.
The Mediatrix 1204 runs the current software version (v5.0rx.x).
3. Perform the software downgrade to the older application (v4.4rx.x) as described in “Download
Procedure” on page 174 .
Emergency Software Procedure
If the software download is suddenly interrupted, it may not be complete. Without any protection against this
situation, the Mediatrix 1204 is not functional.
A transfer may be interrupted for the following reasons:
An electrical shortage.
The user of the Mediatrix 1204 can accidentally power off the unit.
Depending on the moment when the software download has been interrupted, the emergency software
procedure (also called rescue application) can automatically start a new software download to repair the
software if it has been corrupted by the interruption. However, there is a small but critical time frame during
which unrecoverable errors could happen. This is why it is very important that the unit is not turned off during
software downloads.
Using the Emergency Software
When the emergency software procedure starts, the following steps apply:
1. The Mediatrix 1204 tries to initiate the software download with the primary software server.
2. If the software download fails with the primary software server, the Mediatrix 1204 tries to initiate
the software download with the secondary software server.
3. If the primary and the secondary servers cannot be reached, the Mediatrix 1204 tries two default
servers: 192.168.0.10 and then 192.168.0.2.
If, for some reason, it is impossible to rescue the unit by using the primary and secondary servers,
setting up a server at one of these addresses within the correct subnet will provide an ultimate way
to rescue the unit. However, if these addresses cannot be reached from the unit’s subnet, the
default gateway must provide appropriate routing to them.
4. If the software download also fails with the two default servers, the Mediatrix 1204 idles for one
minute.
5. After this one minute, the Mediatrix 1204 tries to initiate the software download again.
6. If the software download fails again with the primary, secondary, and default software servers, the
Mediatrix 1204 idles for two minutes before attempting to initiate the software download.
Note:
If you perform a default reset on the Mediatrix 1204, you must download the current version into the
unit before performing the software downgrade procedure.