Luc Morissette: New page on M2UA timers for Satellite connections

2022-09-26T18:24:53Z

New page on M2UA timers for Satellite connections

New page

{{DISPLAYTITLE:M2UA Satellite Settings}}
=== '''''Applies to version(s): v2.9 and above''''' ===

Connections through satellite produce unusual delays in a communication path. <br>
To decrease the chance of a link going down because of delays, we can adjust timer settings for M2UA sigtran connection. <br>

==== Default values ====
'''SCTP configuration modification'''
* Adv->Life time of MD5 keys = 5 seconds

'''M2UA configuration modification'''
* Timers->SCTP Poll Timer = 1 seconds
* Timers->AS Pending Timer = 1 seconds
* Timers->Congestion polling timer = 1 seconds
* Timers->Ack Timer = 1 seconds

'''M2UA SAP configuration modification'''
* SCTP Primitive Timer = 1 seconds
* SCTP SAP->Maximum ACK delay = 0.1 seconds
* SCTP SAP->Initial RTO = 1.5 seconds
* SCTP SAP->Minimum RTO = 100 milliseconds
* SCTP SAP->Maximum RTO = 2 seconds
* SCTP SAP->Freeze timer = 1.5 seconds
* SCTP SAP->Cookie life time = 30 seconds
* SCTP SAP->Delay between heartbeat = 1.5 seconds

==== To support 600ms to 1.5 seconds delay, we recommend these timer values for M2UA ====
'''SCTP configuration modification'''
* Adv->Life time of MD5 keys = 60 seconds

'''M2UA configuration modification'''
* Timers->SCTP Poll Timer = 3 seconds
* Timers->AS Pending Timer = 3 seconds
* Timers->Congestion polling timer = 3 seconds
* Timers->Ack Timer = 3 seconds

'''M2UA SAP configuration modification'''
* SCTP Primitive Timer = 3 seconds
* SCTP SAP->Maximum ACK delay = 3 seconds
* SCTP SAP->Initial RTO = 1 seconds
* SCTP SAP->Minimum RTO = 600 milliseconds
* SCTP SAP->Maximum RTO = 10 seconds
* SCTP SAP->Freeze timer = 15 seconds
* SCTP SAP->Cookie life time = 60 seconds
* SCTP SAP->Delay between heartbeat = 5 seconds

==== To support 7.5 seconds delay, we tested these timer values for M2UA ====
'''SCTP configuration modification'''
* Adv->Life time of MD5 keys = 60 seconds

'''M2UA configuration modification'''
* Timers->SCTP Poll Timer = 12 seconds
* Timers->AS Pending Timer = 12 seconds
* Timers->Congestion polling timer = 12 seconds
* Timers->Ack Timer = 12 seconds

'''M2UA SAP configuration modification'''
* SCTP Primitive Timer = 12 seconds
* SCTP SAP->Maximum ACK delay = 10 seconds
* SCTP SAP->Initial RTO = 5 seconds
* SCTP SAP->Minimum RTO = 3 seconds
* SCTP SAP->Maximum RTO = 20 seconds
* SCTP SAP->Freeze timer = 15 seconds
* SCTP SAP->Cookie life time = 60 seconds
* SCTP SAP->Delay between heartbeat = 6 seconds

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Luc Morissette: New page on M2UA timers for Satellite connections