Gateway

PMTUD discovery and DF bit propagation for EDT over NetScaler Gateway

May 7, 2024

Contributed by:

H C

From release 13.1 build 17.x, the NetScaler Gateway appliance supports DF bit enforcement for the EDT path maximum transmission unit discovery (PMTUD). Path MTU discovery helps in dynamically determining the maximum transmission unit (MTU) when establishing a session. The DF bit enforcement prevents EDT fragmentation that might result in performance degradation or failure to establish a session.

In earlier releases, NetScaler Gateway supported EDT path MTUD but did not support DF bit enforcement.

For more details, see EDT MTU discovery.

Enable the PMTUD support by using the CLI

At the command prompt, type;

set ica parameter [-EnableSRonHAFailover ( YES | NO )] [-HDXInsightNonNSAP ( YES | NO )] [-EDTPmtudDF ( ENABLED | DISABLED )] [-EDTPmtudDFTimeout <positive_integer>] [-L7LatencyFrequency <positive_integer>]
<!--NeedCopy-->

Example:

set ica parameter -EnableSRonHAFailover YES -EDTPmtudDF ENABLED -EDTPmtudDFTimeout 100
<!--NeedCopy-->

Note:

From release 13.1 build 42.x and later, the EDTPmtudDF parameter is enabled, by default. Previously, this option was disabled, by default.

Enable the PMTUD support by using the GUI

Navigate to System > Settings > Change ICA Parameters.
In EDT PMTUD DF Enforce duration, enter the time-out in seconds for the PMTUD DF enforcement.

Note:

From release 13.1 build 42.x and later, the Enforce DF for EDT PMTUD option is enabled, by default. Previously, this option was disabled, by default.

PMTUD parameter on GUI

The official version of this content is in English. Some of the Cloud Software Group documentation content is machine translated for your convenience only. Cloud Software Group has no control over machine-translated content, which may contain errors, inaccuracies or unsuitable language. No warranty of any kind, either expressed or implied, is made as to the accuracy, reliability, suitability, or correctness of any translations made from the English original into any other language, or that your Cloud Software Group product or service conforms to any machine translated content, and any warranty provided under the applicable end user license agreement or terms of service, or any other agreement with Cloud Software Group, that the product or service conforms with any documentation shall not apply to the extent that such documentation has been machine translated. Cloud Software Group will not be held responsible for any damage or issues that may arise from using machine-translated content.

PMTUD discovery and DF bit propagation for EDT over NetScaler Gateway

May 7, 2024

Contributed by:

H C

May 7, 2024

Contributed by:

H C

PMTUD discovery and DF bit propagation for EDT over NetScaler Gateway

Enable the PMTUD support by using the CLI

Enable the PMTUD support by using the GUI

In this article