Bug ID 1013793: Pool members may flap on BIG-IP VE with provision.1nic set to forced_enable

Last Modified: Mar 15, 2024

Affected Product(s):
BIG-IP LTM, MA-VE, TMOS(all modules)

Known Affected Versions:
14.1.0, 14.1.0.1, 14.1.0.2, 14.1.0.3, 14.1.0.5, 14.1.0.6, 14.1.2, 14.1.2.1, 14.1.2.2, 14.1.2.3, 14.1.2.4, 14.1.2.5, 14.1.2.6, 14.1.2.7, 14.1.2.8, 14.1.3, 14.1.3.1, 14.1.4, 14.1.4.1, 14.1.4.2, 14.1.4.3, 14.1.4.4, 14.1.4.5, 14.1.4.6, 14.1.5, 14.1.5.1, 14.1.5.2, 14.1.5.3, 14.1.5.4, 14.1.5.6, 15.0.0, 15.0.1, 15.0.1.1, 15.0.1.2, 15.0.1.3, 15.0.1.4, 15.1.0, 15.1.0.1, 15.1.0.2, 15.1.0.3, 15.1.0.4, 15.1.0.5, 15.1.1, 15.1.2, 15.1.2.1, 15.1.3, 15.1.3.1, 15.1.4, 15.1.4.1, 15.1.5, 15.1.5.1, 15.1.6, 15.1.6.1, 15.1.7, 15.1.8, 15.1.8.1, 15.1.8.2, 15.1.9, 15.1.9.1, 15.1.10, 15.1.10.2, 15.1.10.3, 16.0.0, 16.0.0.1, 16.0.1, 16.0.1.1, 16.0.1.2, 16.1.0, 16.1.1, 16.1.2, 16.1.2.1, 16.1.2.2, 16.1.3, 16.1.3.1, 16.1.3.2, 16.1.3.3, 16.1.3.4, 16.1.3.5, 16.1.4, 16.1.4.1, 16.1.4.2, 17.0.0, 17.0.0.1, 17.0.0.2, 17.1.0, 17.1.0.1, 17.1.0.2, 17.1.0.3, 17.1.1, 17.1.1.1, 17.1.1.2

Opened: Apr 22, 2021

Severity: 3-Major

Symptoms

-- Pool members flap up and down -- Network trace shows BIG-IP sending TCP SYN followed immediately by RST to pool members for traffic.

Impact

-- Monitor statuses unreliable.

Conditions

-- BIG-IP Virtual Edition (VE) -- System using the 'sock' network driver, as can be determined by reviewing the output of the following command: tmctl -d blade tmm/device_probed -- The 'provision.1nic' DB key is set to 'forced_enable'. This is common in BIG-IP VE configurations running on Azure.

Workaround

Use the following commands to work around this on a running system: command iptables -t raw -I PREROUTING 1 -i eth+ -j DROP command ip6tables -t raw -I PREROUTING 1 -i eth+ -j DROP In addition to that, to ensure the workaround persists after TMM restarts or system reboots, add the following to /config/user_alert.conf: alert tmm_id1013793_workaround "HA reports tmm ready" { exec command="iptables -t raw -D PREROUTING -i eth+ -j DROP"; exec command="ip6tables -t raw -D PREROUTING -i eth+ -j DROP"; exec command="iptables -t raw -I PREROUTING 1 -i eth+ -j DROP"; exec command="ip6tables -t raw -I PREROUTING 1 -i eth+ -j DROP"; } And then restart alertd by running: tmsh restart sys service alertd

Fix Information

None

Behavior Change

Guides & references

K10134038: F5 Bug Tracker Filter Names and Tips