Bug ID 452225: Deletion of serverside PPTP GRE flow may cause a core dump in TMM

Last Modified: Sep 13, 2023

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

Known Affected Versions:
11.6.2 HF1

Fixed In:
11.6.0, 11.5.1 HF3

Opened: Mar 13, 2014

Severity: 1-Blocking

Related Article: K16358

Symptoms

Deletion of serverside point-to-point tunneling protocol (PPTP) Generic Routing Encapsulation (GRE) flow may cause a core dump in TMM.

Impact

Traffic disrupted while tmm restarts.

Conditions

If the BIGIP is configured to use SP DAG (src-ip on inbound/subscriber vLAN and dst-ip on outbound/internet VLAN) and LSN is under configured on outbount/internet VLAN (in this case, only one IP address), the unexpected teardown or deletion of a PPTP GRE serverside flow will cause TMM to core dump.

Workaround

This issue has no workaround.

Fix Information

Resolved when the BIGIP is configured to use SP DAG (src-ip on inbound/subscriber vLAN and dst-ip on outbound/internet VLAN) and LSN is under configured on outbount/internet VLAN (in this case, only one IP address), the unexpected teardown or deletion of a PPTP GRE serverside flow will cause TMM to core dump.

Behavior Change

Guides & references

K10134038: F5 Bug Tracker Filter Names and Tips