What Is The Functionality Of Egress Message Throttling Group and How It Works

Asset ID:	1-71-2393429.1
Update Date:	2018-05-06
Keywords:

Solution Type Technical Instruction Sure

Solution 2393429.1 : What Is The Functionality Of Egress Message Throttling Group and How It Works

Applies to:

Oracle Communications Diameter Signaling Router (DSR) - Version DSR 5.0 and later
Tekelec

Goal

What Is The Functionality Of Egress Message Throttling Group and How It Works.

Solution

An Egress Throttle Group (ETG) MO is used to group a set of Connections and Peer Nodes within a DSR Node. Both Connections and Peer Nodes can be assigned to a ETG. However, assigning a Peer Node to an ETG implicitly is assigning all of the connections associated with the Peer Node to the ETG.

ETG/ETL throttling is performed based upon user-defined maximum values, congestion levels associated with these maximum values, and user-defined onset/abatement thresholds for each congestion level. Threshold Throttling is only supported on DSR Nodes which support a 5‑priority scheme. As an ETG or ETL’s egress Request message traffic rate increases and exceeds the Rate Limiting onset thresholds configured in the ETG/ETL, the ETG/ETL’s Throttle Status will also increase. As the ETG/ETL’s Throttle Status increases, Message Priority becomes a factor in determining if a message can be routed to a member of the ETG/ETL or will be throttled.

Requests with message priority < throttle status will not be routed to any member of the ETG/ETL.When the EMR for an ETG/ETL reaches the ETG/ETL’s Maximum Egress Request Rate or the ETG/ETL’s Pending transactions reaches the ETG/ETL’s Maximum Egress Pending Requests, no Requests will be routed to any members of the ETG by DSR.

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