Last Modified: Apr 28, 2025
Affected Product(s):
F5OS F5OS
Known Affected Versions:
F5OS-A 1.3.0, F5OS-A 1.3.1
Fixed In:
F5OS-A 1.5.0, F5OS-A 1.4.0, F5OS-A 1.3.2
Opened: Nov 01, 2022 Severity: 2-Critical
When the system boots up, the interfaces may flap (go up and down) several times in quick succession before coming up and stabilizing. If a peer switch is configured to detect excessive link flaps, it may put the port in an err-disable state and prevent the link from coming up.
If the peer switch triggers a link-flap detection feature, the ports may remain offline until an administrator manually recovers the port on that switch.
-- r5000 or r10000 Series appliance
There is no workaround for this issue on the rSeries appliance. An administrator can mitigate this issue by doing one of the following: - configuring the peer switch to automatically try to recover ports that are disabled for excessive link flapping - increasing the number of link flaps required in a certain interval before the port is put in a disabled state
Insure optic transmitters are disabled while front panel ports are being initialized.