path-selection settings tunnel adjust-mss enable
Enables a TCP maximum segment size (MSS) adjustment when path tunnels are configured for path selection.
Syntax
[no] path-selection settings tunnel adjust-mss enable
Parameters
None
Usage
IP fragmentation of GRE packets can occur when the encapsulated packets exceed the MTU. When you configure an uplink with the tunnel mode set to GRE, the SteelHead automatically applies an MSS value to the traffic and prevents fragmentation from occurring. This automatically applied MSS value ensures that, in most environments, packets are not fragmented, even with the extra GRE overhead.
The no command option turns off the automatic MSS adjustment. Use this command to reenable the MSS adjustment if it has been disabled.
The MSS adjustment is on by default. As a best practice, leave the MSS adjustment on.
See the SteelHead Deployment Guide for more information about MTU sizing.
Example
amnesiac (config) # path-selection settings tunnel adjust-mss enable
Product
SteelHead CX, SteelHead EX
Related Commands