CKFR_356853
Sep 10, 2018Nimbostratus
Active was down, Standby took over, then Active went up, conflict happened.
Hello,
I have an issue with my Active/Standby F5 devices.
Active node (F5_A) lost its network connection.
Standby node (F5_B) took over as Active.
After 10 minutes, F5_A went back online. So, I have Active/Active devices.
Everything failed because of this case. I had to force to Standby F5_B to be able to be online again.
Why does this conflict happened?
This article is what we have setup right now, except, we use Network Failover because they are located in different location.
http://itadminguide.com/configure-high-availability-activestandby-of-big-ip-f5-ltms/
Auto failback is disabled on both devices.
I saw this logs when F5_A went back online. I am not sure about the behavior of it once it went back.
Sep 7 22:39:12 f5_B notice sod[7345]: 010c007e:5: Not receiving status updates from peer device /Common/f5_A (10.41.253.44) (Disconnected).
Sep 7 22:39:12 f5_B notice sod[7345]: 010c006d:5: Leaving Standby for Active (best load): NextActive:.
Sep 7 22:39:12 f5_B notice sod[7345]: 010c0053:5: Active for traffic group /Common/only_4751.
Sep 7 22:39:12 f5_B notice sod[7345]: 010c006d:5: Leaving Standby for Active (best load): NextActive:.
Sep 7 22:39:12 f5_B notice sod[7345]: 010c0053:5: Active for traffic group /Common/prefer_4751.
Sep 7 22:39:12 f5_B notice sod[7345]: 010c006d:5: Leaving Standby for Active (best load): NextActive:.
Sep 7 22:39:12 f5_B notice sod[7345]: 010c0053:5: Active for traffic group /Common/prefer_MDR.
Sep 7 22:39:12 f5_B notice sod[7345]: 010c006d:5: Leaving Standby for Active (best load): NextActive:.
Sep 7 22:39:12 f5_B notice sod[7345]: 010c0053:5: Active for traffic group /Common/traffic-group-1.
Sep 7 22:39:12 f5_B notice sod[7345]: 010c0019:5: Active
Sep 7 22:49:10 f5_B notice sod[7345]: 010c007f:5: Receiving status updates from peer device /Common/f5_A (10.41.253.44) (Online).
Sep 7 22:49:10 f5_B notice tmm1[21172]: 01340001:5: HA Connection with peer 10.70.1.236:32771 for traffic-group /Common/only_4751 established.
Sep 7 22:49:10 f5_B notice tmm3[21172]: 01340001:5: HA Connection with peer 10.70.1.236:32769 for traffic-group /Common/only_4751 established.
Sep 7 22:49:10 f5_B notice tmm2[21172]: 01340001:5: HA Connection with peer 10.70.1.236:32768 for traffic-group /Common/only_4751 established.
Sep 7 22:49:10 f5_B notice tmm[21172]: 01340001:5: HA Connection with peer 10.70.1.236:32770 for traffic-group /Common/only_4751 established.
Sep 7 22:49:10 f5_B notice tmm[21172]: 01340001:5: HA Connection with peer 10.70.1.236:32771 for traffic-group /Common/prefer_4751 established.
Sep 7 22:49:10 f5_B notice tmm2[21172]: 01340001:5: HA Connection with peer 10.70.1.236:32769 for traffic-group /Common/prefer_4751 established.
Sep 7 22:49:10 f5_B notice tmm1[21172]: 01340001:5: HA Connection with peer 10.70.1.236:32770 for traffic-group /Common/prefer_4751 established.
Sep 7 22:49:10 f5_B notice tmm3[21172]: 01340001:5: HA Connection with peer 10.70.1.236:32768 for traffic-group /Common/prefer_4751 established.
Sep 7 22:49:10 f5_B notice tmm3[21172]: 01340001:5: HA Connection with peer 10.70.1.236:32769 for traffic-group /Common/prefer_MDR established.
Sep 7 22:49:10 f5_B notice tmm1[21172]: 01340001:5: HA Connection with peer 10.70.1.236:32771 for traffic-group /Common/prefer_MDR established.
Sep 7 22:49:10 f5_B notice tmm2[21172]: 01340001:5: HA Connection with peer 10.70.1.236:32768 for traffic-group /Common/prefer_MDR established.
Sep 7 22:49:10 f5_B notice tmm[21172]: 01340001:5: HA Connection with peer 10.70.1.236:32770 for traffic-group /Common/prefer_MDR established.
Sep 7 22:49:10 f5_B notice tmm3[21172]: 01340001:5: HA Connection with peer 10.70.1.236:32770 for traffic-group /Common/traffic-group-1 established.
Sep 7 22:49:10 f5_B notice tmm1[21172]: 01340001:5: HA Connection with peer 10.70.1.236:32768 for traffic-group /Common/traffic-group-1 established.
Sep 7 22:49:10 f5_B notice tmm2[21172]: 01340001:5: HA Connection with peer 10.70.1.236:32771 for traffic-group /Common/traffic-group-1 established.
Sep 7 22:49:10 f5_B notice tmm[21172]: 01340001:5: HA Connection with peer 10.70.1.236:32769 for traffic-group /Common/traffic-group-1 established.