Bug ID 934993: BIG-IP resets HTTP/2 connections when a peer exceeds a number of concurrent streams

Last Modified: Sep 14, 2023

Affected Product(s):
BIG-IP LTM(all modules)

Known Affected Versions:
14.1.0,,,,,, 14.1.2,,,,,,,,, 14.1.3,, 14.1.4,,,,,,, 14.1.5,,,,,, 15.0.0, 15.0.1,,,,, 15.1.0,,,,,, 15.1.1, 16.0.0,, 16.0.1

Fixed In:
16.1.0,, 15.1.2

Opened: Aug 10, 2020

Severity: 3-Major


The HTTP/2 protocol allows informing a peer about the number of concurrent streams it is allowed to have. When this number is exceeded, the RFC stipulates that the system must serve all open streams and then terminate a connection.


BIG-IP resets a connection and a client (browser) does not receive any response for outstanding requests. It requires manually reload of the webpage to address the issue.


-- The BIG-IP system has a virtual server with an HTTP/2 profile configured on the client side. -- A client opens more streams than a configured value for concurrent-streams-per-connection in HTTP/2 profile.



Fix Information

When a peer exceeds a number of concurrent streams allowed by BIG-IP systems, it sends GOAWAY with a REFUSED_STREAM error code and allows graceful completion of all open streams, and then terminates the connection.

Behavior Change

Guides & references

K10134038: F5 Bug Tracker Filter Names and Tips