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Getting Started

• Download Changes—To download the list of changes as a file, click More Options > Download as

Configuration Changes that Restart Inspection Engines

Any of the following configurations or actions restart inspection engines when you deploy configuration

changes.

Caution

Deployment

Some changes require that inspection engines be restarted, which will result in momentary traffic loss. Following

are the changes that require inspection engine restart:

• SSL decryption policy is enabled or disabled.

• The MTU changed on one or more physical interfaces (but not subinterfaces).

• You add or remove a file policy on an access control rule.

• The VDB was updated.

• Creating or breaking the high availability configuration.

In addition, some packets might be dropped during deployment if the Snort process is busy, with the total

CPU utilization exceeding 60%. You can check the current CPU utilization for Snort using the show asp

inspect-dp snort command.

System Database Updates

If you download an update to the Rules database or VDB, you must deploy the update for it to become active.

This deployment might restart inspection engines. When you manually download an update, or schedule an

update, you can indicate whether the system should automatically deploy changes after the download is

complete. If you do not have the system automatically deploy the update, the update is applied the next time

you deploy changes, at which time inspection engines might restart.

System Updates

Installing a system update or patch that does not reboot the system and includes a binary change requires

inspection engines to restart. Binary changes can include changes to inspection engines, a preprocessor, the

vulnerability database (VDB), or a shared object rule. Note also that a patch that does not include a binary

change can sometimes require a Snort restart.

Text. You are prompted to save the file to your workstation. The file is in YAML format. You can view

it in a text editor if you do not have an editor that specifically supports YAML format.

When you deploy, resource demands may result in a small number of packets dropping without inspection.

Additionally, deploying some configurations requires inspection engines to restart, which interrupts traffic

inspection and drops traffic.

Configuration Changes that Restart Inspection Engines

Getting Started