• Downloads
• Disabling Support for Jumbo Frames    

• Related Topics
• scio const

Disabling Support for Jumbo Frames

By default, the IDP engine processes traffic as large as the maximum transmission unit (MTU) required to support jumbo frames (9014 bytes = 9000 bytes of payload+ 14 bytes for the Ethernet header). The IDP engine drops frames that are larger than 9014 bytes.

If you encounter issues processing jumbo frames, you can change the default maximum frame size to what is required to support the Ethernet MTU (1514 bytes= 1500 bytes of payload + 14 bytes for the Ethernet header). The greatest value supported for maximum frame size is 16,014 bytes.

To change the MTU:

1. Log into the CLI as admin and enter su - to switch to root.
2. Enter the following commands to view and change the MTU:
   
   

   [root@defaulthost admin]# scio const -s s0 get sc_max_frame_size

   scio: sc_max_frame_size =  0x2336 

   
   

   [root@defaulthost admin]# scio const -s s0 set sc_max_frame_size 1514

   scio: sc_max_frame_size = 0x5EA