Cisco Cisco Packet Data Interworking Function (PDIF)
P-GW Changes in Release 17
P-GW Enhancements for 17.3 ▀
Release Change Reference, StarOS Release 17 ▄
359
CSCus80195 - T3/N3 timer with 100 ms granularity
Feature Changes
Granularity Added to T3/N3 Timer
This enhancement introduces the ability to configure T3/N3 timer in millisecond (ms) granularity. This helps reduce the
possibility of “packet collision” between P-GW/S-GW/MME and so on by being able to configure a nearly identical
second value separated by a few 100 ms.
possibility of “packet collision” between P-GW/S-GW/MME and so on by being able to configure a nearly identical
second value separated by a few 100 ms.
The new T3 value is configured in 100 ms granularity, starting at 1000 ms (1 second). The previous range for T3 value
was between 1 to 20 seconds, with a default of 5 seconds. The range for the new T3 value is 1000-20000 ms, with
numbers going up by 100 ms.
was between 1 to 20 seconds, with a default of 5 seconds. The range for the new T3 value is 1000-20000 ms, with
numbers going up by 100 ms.
Previous Behavior: The CLI command
retransmission-timeout
was operational. Timer granularity for T3/N3
timer was in seconds.
New Behavior: The CLI command
retransmission-timeout
is now obsolete; this CLI has been replaced by the
CLI command
retransmission-timeout-ms
. Timer granularity for T3/N3 has been changed from seconds
granularity to 100 milliseconds.
Command Changes
retransmission-timeout-ms
This new CLI command introduces 100 millisecond (ms) timer granularity for the T3 timer.
The range for the T3 value was 1 to 20 seconds, with a default value of 5 seconds. The new range is 1000 to 20000 ms,
with increments of 100 ms.
with increments of 100 ms.
configure
context context_name
ggsn-service service_name
retransmission-timeout-ms retransmit_time
default retransmission-timeout-ms
end
Notes:
default: Configures the default time interval that must pass without an SGSN response before the GGSN service
retransmits GTP control packets.
retransmit_time:
Specifies the amount of time, in milliseconds, that must pass without an SGSN response
before the GGSN service retransmits GTP control packets. Must be an integer from 1000 to 20000, with
increments of 100.
increments of 100.
Default: 5000
retransmission-timeout-ms