Cisco Cisco Catalyst 6500 Series 7600 Series ASA Services Module

When using the current Java version, the ASDM Launcher requires a trusted certificate. An easy 
approach to fulfill the certificate requirements is to generate a self-signed identity certificate and to 
configure the ASA to use it when establishing an SSL connection. After you generate the identity 
certificate and configure the ASA, you need to register it with the Java Control Panel on your computer. 
You can use Java Web Start to launch ASDM until you install a certificate.

See the following document to install a self-signed identity certificate on the ASA for use with ASDM, 
and to register the certificate with Java.

For information about ASA/ASDM requirements and compatibility, see Cisco ASA Compatibility:

For VPN compatibility, see the Supported VPN Platforms, Cisco ASA 5500 Series:

ASDM supports a maximum configuration size of 512 KB. If you exceed this amount you may 
experience performance issues. For example, when you load the configuration, the status dialog 
shows the percentage of the configuration that is complete, yet with large configurations it stops 
incrementing and appears to suspend operation, even though ASDM might still be processing the 
configuration. If this situation occurs, we recommend that you consider increasing the ASDM 
system heap memory.

To increase the ASDM heap memory size, download the ASDM-IDM Launcher, and then modify 
the ASDM-IDM Launcher shortcut by performing the following steps.

Windows:

Right-click the shortcut for the Cisco ASDM-IDM Launcher, and choose Properties.

Click the Shortcut tab.

In the Target field, change the argument prefixed with “-Xmx” to specify your desired heap size. 
For example, change it to -Xmx768M for 768 MB or -Xmx1G for 1 GB.