What is PacketShaper 12000's supported frame size?

Products

• PacketShaper

Issue/Introduction

The article explains what PacketShaper 12000's supported frame size is.

 

Environment

PacketShaper

Cause

When the network environment uses jumbo packets, it's important to know the frame size PacketShaper supports.

Resolution

The maximum frame size that a PS12000 will forward is 2000 bytes.

You can change the MTU size on PacketShaper using the MSS system variables:

#
setup variable tcpMssInbound 1960
setup variable tcpMssOutbound 1960
#

Note: MSS is lower than MTU by 40 bytes. (20 bytes for IP header and another 20 bytes for TCP header).

Additional Information

11-Apr-2025: added Environment, corrected Cause and Introduction