Cisco GPRS Tunnelling Protocol T3 Response Timer

1.3.6.1.4.1.9.10.48.1.1.1.2

The T3-RESPONSE timer for retransmission. This timer is started by GGSN, upon the transmission of a signalling request message; it is used for message retransmission purposes, in the event that no response is received by the time the timer expires. Note that the total wait time (cgprsGtpT3ResponseTimer*cgprsGtpN3Requests) must be shorter than the Mobile System (MS) wait time between retries of Attach and RA Updates; The product of cgprsGtpT3ResponseTimer and cgprsGtpN3requests must be less than the minimum value of the Attach Timer(T3310) and the Routing Area Update timer(T3330). The cgprsGtpT3ResponseTimer timer, according to the standards, recommends an adaptive back-off mechanism, using increasing values, e.g., 1, 2, 4, and 8 seconds.