The earliest recollection of this bug is traced back to PAN-OS 12.1.4-h9. - July 23, 2026. This bug is fixed in PAN-OS versions 12.1.4-h9.. Fixed an issue where SFP ports did not establish a link with a third-party peer device when forced speed was configured on the firewall and the peer device was set to nonegotiate . For more information: https://docs.paloaltonetworks.com/ngfw/release-notes/12-1/pan-os-12-1-4-known-and-addressed-issues/pan-os-12-1-4-h9-addressed-issues