B02. Why It's Conditional To Upgrade To Zynos V4.01 For Zywall 70; B03. What Is Zynos V3.65 For Zywall 70; B04. What Happens If I Wrongfully Upgrade Firmware Of A Zywall 70 With Only 32Mb Of Ram To Zynos V4.01 Directly - ZyXEL Communications ZyWall 35 Support Notes

B02. Why it's conditional to upgrade to ZyNOS v4.01 for ZyWALL 70?

Because there are two versions of ZyWALL 70 in the field: the 32MB-RAM and the 64 MB-RAM
versions. Only ZyWALL 70 equipped with 64MB RAM can be upgraded to run ZyNOS v4.00 and above.
You can identify these two by checking the memory sizes. To check the memory of ZyWALL 70, issue
the following command in CLI: "sys atsh"
As a result, for ZyWALL 70 with 64MB RAM, the upgrade path is supposed to be like this:
ZyNOS v3.62/v3.63/v3.64
Please note, you can NOT upgrade to ZyNOS v4.00 directly. You must go through ZyNOS v3.65.
For ZyWALL 70 with 32MB RAM, the upgrade path is:
ZyNOS v3.62/v3.63/v3.64
Please note, ZyWALL 70 with 32MB RAM can NOT be upgraded to run ZyNOS v4.00 and above.
To summarize, we have created the following table for your reference:
Firmware
v3.62/3.63/3.64
v3.65
v4.00

B03. What is ZyNOS v3.65 for ZyWALL 70?

ZyNOS v3.65 is designed solely for ZyWALL 70. It is a "gating" firmware version for upgrading ZyNOS
to v4.00 and above.
Firmware v3.65 will verify ZW70's memory size to see if user can upgrade to 4.00 or not. If end user
wanted to upgrade to v4.00, she/he needs to upgrade to v3.65 first and this is a MANDATORY process.
The ZyNOS v3.65 does NOT support the following features: Anti-Virus + IDP security service and
Anti-Spam security service.
ZyXEL will keep maintaining both ZyNOS v3.65, v4.00 and above for all ZyWALL 70 in the field.
B04. What happens if I wrongfully upgrade firmware of a ZyWALL 70 with only 32MB of
RAM to ZyNOS v4.01 directly?
Because of the built-in protection mechanism, the upgrade will fail and you will receive an error message
saying the device is not supported.
ZyNOS v3.65
ZyNOS v3.65.
Firmware-Model Mappings
ZW70 (32MB) ZW70 (64MB)
X
X
N/A
All contents copyright (c) 2006 ZyXEL Communications Corporation.
ZyWALL 35 Support Notes
ZyNOS v4.00 ZyNOS v4.01.
ZW35
X
X
X
ZW5
X v3.62/3.64
N/A N/A
X X
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