Bug ID 746460: SCTP profiles have been modified to advertise one stream unless configured otherwise

Last Modified: Jan 20, 2023

Bug Tracker

Affected Product:  See more info
BIG-IP TMOS(all modules)

Known Affected Versions:
13.0.0, 13.0.0 HF1, 13.0.0 HF2, 13.0.0 HF3, 13.0.1, 13.1.0,,,,,,,,, 13.1.1,,,,, 13.1.3,,,,,,, 13.1.4,, 13.1.5,, 14.0.0,,,,,, 14.0.1,, 14.1.0,,,,,, 14.1.2,,,,,,,,, 14.1.3,, 14.1.4,,,,,,, 14.1.5,,,

Fixed In:

Opened: Oct 10, 2018
Severity: 3-Major


SCTP profiles used to default to two streams. When a client connects, the profile negotiates assuming that the server can accept two streams. When a server connection is established later, if the server advertises only one stream, the connection resets. This scenario results in a difficult-to-diagnose condition.


Unless otherwise explicitly configured, SCTP profiles advertises one stream only.


If not configured, the default for SCTP profiles is now to advertise and accept only one stream in each direction.


If more than one stream is required, configure the SCTP profile for a greater number.

Fix Information

The SCTP profile has been modified to default to a more-reliable and easier-to-understand configuration.

Behavior Change

The BIG-IP SCTP profile has been modified so that the default configuration for SCTP profiles supports 1 (one) stream.