Configuring Sctp Retransmission Control For A M3Ua Or Sua Association - Tekelec IP7 Secure Gateway Administration Manual

Database Administration Manual - IP7 Secure
Gateway

Configuring SCTP Retransmission Control for a M3UA or SUA Association

This procedure is used to gather the information required to configure the retransmission parameters
for SUA associations and M3UA associations that are assigned to cards running either the SS7IPGW
or IPGWI applications. Perform the
procedure to configure the retransmission parameters for M3UA associations assigned to IPSG cards.
If any assistance is needed to configure the retransmission parameters for associations, contact the
Customer Care Center. Refer to
The retransmission parameters are configured using the rmode, rmin, rmax, rtimes, and cwmin
parameters of the chg-assoc command.
:rmode – The retransmission mode used when packet loss is detected. The values are rfc or lin.
rfc – Standard RFC 2960 algorithm in the retransmission delay doubles after each retransmission.
The RFC 2960 standard for congestion control is also used.
lin – Tekelec's linear retransmission mode where each retransmission timeout value is the same
as the initial transmission timeout and only the slow start algorithm is used for congestion control.
:rmin – The minimum value of the calculated retransmission timeout in milliseconds.
:rmax – The maximum value of the calculated retransmission timeout in milliseconds.
Note: The rmin and rmax parameter values form a range of retransmission values. The value of the
rmin parameter must be less than or equal to the rmax parameter value.
:rtimes – The number of times a data retransmission occurs before closing the association.
:cwmin – The minimum size in bytes of the association's congestion window and the initial size in
bytes of the congestion window.
For associations assigned to the ss7ipgw or ipgwi applications, the value of the cwmin parameter
must be less than or equal to 16384.
The Changing the Attributes of a M3UA or SUA Association
these parameters. In addition to using the
procedure, these pass commands are also used in this procedure.
ping – tests for the presence of hosts on the network.
assocrtt – displays the SCTP round trip times for a specified association. Minimum, maximum,
and average times are kept for each open association. The Retransmission Mode (RFC or LIN) and
the configured Minimum and Maximum Retransmission Timeout limits are also displayed.
sctp – provides a summary list of all SCTP instances.
sctp -a <association name> – displays the measurements and information for a specific
association.
Note: The values for the minimum and maximum retransmission times in the output from this
command are shown in microseconds.
For more information on the pass commands, see the Commands Manual.
The chg-assoc command contains other optional parameters that can be used to configure an
association. These parameters are not shown here because they are not necessary for configuring the
SCTP retransmission parameters. These parameters are explained in more detail in the
910-6278-001 Revision A, January 2012
IETF M3UA and SUA Configuration Procedures
Configuring an IPSG Association for SCTP Retransmission Control
Customer Care Center for the contact information.
Changing the Attributes of a M3UA or SUA Association
procedure is used to change the values of
Changing the
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