Bug ID 1620249: APM 15.x-17.x - Connection limits on virtual server breaks iSession tunnels

Last Modified: Apr 28, 2025

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

Opened: Jul 24, 2024

Severity: 3-Major

Symptoms

Users reports that Apptunnels or Optimized application cannot establish. BIG-IP administrator observes the following LTM logs: err tmm[19171]: 01230140:3: RST sent from 10.20.27.3:443 to 10.20.3.10:60823, [0x2f14aa6:381] iSession error (err: isession_handle_syn:3737, No peer, ERR_ARG)

Impact

Users are not able to use features that rely on iSession, such as Apptunnels or Optimized applications

Conditions

Virtual server that serves iSession tunnels is configured with a connection limit other than 0 and a connection rate limit other than 0

Workaround

None

Fix Information

None

Behavior Change

Guides & references

K10134038: F5 Bug Tracker Filter Names and Tips