Oracle® Communications EAGLE Database Administration - SS7 User's Guide Release 46.8 F11884 Revision 1 |
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Note:
The pacing rate feature is not supported in ITU networks.This procedure is used to configure the rate that the EAGLE sends the TFR and TFA messages, or the pacing rate. The pacing rate is configured with the tfatfrpr
parameter of the chg-stpopts
command. The value of the tfatfrpr
parameter is from 0 to 1 second and can be set in 0.1 second intervals. When the chg-stpopts
command is first introduced to the EAGLE, the default value for the tfatfrpr
parameter is 1 second. A value of 0 for the tfatfrpr
parameter indicates that the pacing should stop. The pacing of TFR/TCR is stopped and all remaining TFR/TCR are broadcast at once if the current alternate route used to route traffic to the affected point code is in danger of congestion. The value of the tfatfrpr
parameter in the chg-stpopts
command is entered and displayed in the rtrv-stpopts
command output in milliseconds.
For this example, the TFA/TFR pacing rate is changed from 1 second to 0.5 seconds (1000 milliseconds to 500 milliseconds).
When the status of the route is changed to allowed (when the route was restricted) or restricted (when the route was prohibited), a burst of rerouted traffic can occur on that route, thus congesting the route. To help keep this from happening, the EAGLE can control the rate that it broadcasts TFR and TFA messages to adjacent signaling points. This can regulate the amount of traffic the adjacent signaling points can send to the EAGLE when the route becomes allowed or restricted.
The TFA/TCA and TFR/TCR messages for each affected point code are sent in groups of 20%. For each time period defined by the pacing rate, a group of 20% of the messages that are to be sent to the adjacent signaling points are broadcast to those signaling points.
This feature applies only to ANSI signaling links. The pacing is not done toward ITU networks.
If the destination becomes inaccessible or accessible before all of the TFR/TCR messages are broadcasted, then the remaining TFR/TCR messages are not sent.
TFA/TFC messages for multiple affected destinations are sent in parallel.
Figure 3-27 Configuring the TFA/TFR Pacing Rate