We found the SNMP (Simple Network Management Protocol) component, contained in the Network Management package of the AIR v3.0.1 installer, was causing the issue.
Here is a workaround you can use. As long as you follow the instructions below when installing AIR v3.0.1, it should make no difference if AIR v3.0.1 is installed before or after System 7.5 Update 2.0.
* When installing AIR 3.0.1 always choose Custom install, and only select
Basic Connectivity and Half Routing if you need Half Routing.
* During the AIR v3.0.1 installation, you will be asked if you want to
replace the Network control panel with the older version in the
installer. Choose to keep the newer version of the Network control
panel.
NOTE: If you performed an Easy Installation of AIR v3.0.1 after installing System 7.5 Update 2.0, you will need to preform a clean installation of system software to 7.5.3 (clean install System 7.5, then install System 7.5 Update 2.0). This is due to system software being modified during an Easy Install of AIR v3.0.1. Once a clean installation of system software is complete, follow the workaround instructions above.
Article Change History:
15 Apr 1996 - Added note section.