2.6.15.10.7.1 Traffic Throttling Group

To make routing decisions at the Route List level it’s necessary to aggregate some of the individual TTP-level data into data that represents the entire Route Group. This summary data is called a Traffic Throttling Group (TTG). There is one parameter summarized in the TTG:

The calculated Loss % of the TTG. This is the weighted (by Max ETR) average of the % loss in the available TTPs.

Figure 2-32 TTP to TTG Rollup Logic

A TTG is a B-scoped item, containing only TTPs from the same DSR. However, it is useful to be able to share TTGs between DSRs. For instance, for the local DSR to decide whether it’s a good idea to send traffic it can’t handle to the mate DSR, the local DSR needs to know the congestion status of the mate for that particular AppID. To prevent more split-scoped data, the DSR allows the user to define at the B-level which TTGs should be shared between DSRs. The NOAM is then responsible for distributing that list of TTGs to the other DSRs.