For the Sensor to inspect jumbo frames for attacks and other supported IPS features, you must enable jumbo frame parsing at the Sensor level.
Note
Jumbo frame traffic with SSL encryption will not be decrypted even if SSL decryption is enabled until version 11.1.5.122
Click the Devices tab.
Select the domain from the Domain drop-down list.
On the left pane, click the Devices tab.
Select the device from the Device drop-down list.
Select Setup → Advanced → IP Settings.
Common IP Parameters dialog.png "GUID-C207386E-3964-43D5-A7ED-7FBE2AFD1C5C-low.png")
In the Common IP Parameters section of the IP Settings page, select Enabled from the Jumbo Frame Parsing drop-down list and click Update to update the Sensor of the configuration change.
Reboot the Sensor for the changes to be effective.
Note
For Sensors in a HA pair, jumbo parsing must be enabled on each member Sensor of the HA pair.