ltm rule namespace DIAMETERΒΆ

iRule(1)						BIG-IP TMSH Manual						  iRule(1)

DIAMETER
       Namespace DIAMETER

DESCRIPTION
       The DIAMETER namespace deals with and events specifically tailored to manipulate, inspect and interact with the DIAMETER
       authentication protocol.

       Associated Events * DIAMETER_INGRESS - Triggered when the system receives a DIAMETER message.  * DIAMETER_EGRESS -
       Triggered when the system is ready to send a DIAMETER message.  * DIAMETER_RETRANSMISSION - Triggered when the system is
       ready to send a retransmitted DIAMETER request or a generated DIAMETER answer.

       DIAMETER iRule commands operate within a Tcl context associated with the connection flow between the endpoint and the MR
       proxy.  The ingress and egress parts of a message\'s journey therefore operate in separate Tcl contexts.  The Tcl context
       contains the Tcl variables and execution state of the currently executing iRule event.  Only one iRule event can execute at
       a time on a connection flow, therefore messages queue to execute their iRule events.

       DIAMETER messages belong to independent transactions that are carried over the same network connection flow.  It is highly
       desirable for messages sharing a connection flow to execute their iRules independently of other messages.  This provides
       the following advantages and behavior changes:
	   * A message does not need to wait for an unrelated message to complete an event in order to execute its own event.
	   * Messages sharing a connection flow may exit the flow in a different order than they entered.
	   * Tcl variables cannot be overwritten between events by another message.  This capability may be enabled in the
       protocol-specific router profile via the irule-scope-message attribute.	Before enabling irule-scope-message, the user\'s
       iRules should be examined and if necessary adjusted and tested, to ensure they do not rely on sharing a Tcl context between
       messages on a connection flow.

HINTS
SEE ALSO
BIG-IP							    2022-04-12							  iRule(1)