Modifying the maximum packet size

Modify the channel chains to regulate the maximum packet size, in bytes, that Diameter Enabler can send or receive.

About this task

The maxPacketSize parameter is primarily intended to protect the system from excessive resource use by a rogue or erroneous applications or Diameter peers.

You can modify the custom property maxPacketSize for Diameter Enabler. If a peer attempts to send a packet that is larger than the defined maxPacketSize value, Diameter Enabler will log an error and close the connection with the peer. If one of the Diameter applications attempts to use Diameter Enabler to send a packet that exceeds the defined maxPacketSize, the send request will fail, and Diameter Enabler will return an error to the application and keep the connection open. If the maxPacketSize value is not defined, Diameter Enabler will use a default value of 10000 bytes.

You must set the maxPacketSize value separately on each of the Diameter channel chains, DiameterChain and SecureDiameterChain. After you set the maxPacketSize, you must restart the application server for the change to take effect. Therefore you may need to schedule that update to the application server.

Log in to the Integrated Solutions Console.
Click Servers > Application Servers > server_name > Ports.
In the Port Name column, find the DiameterNamedEndPoint.
In the Transport Details column, click View associated transports.
Click DiameterChain or SecureDiameterChain.
Click Generic inbound channel (DiameterGenericInboundChannel).
Click Custom Properties.
Click New.
Under General Properties, type maxPacketSize in the Name field.
Type a value for this property in the Value field. The packets are measured in bytes.
Optional: You can also specify a description of this property in the Description field.
Click Apply or OK.
Click Save to save your configuration changes.
Restart the application server.