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The earliest recollection of this bug is traced back to PAN-OS 11.1.13 - December 02, 2025. This bug is fixed in PAN-OS versions 11.1.13. Fixed an issue where BFD echo packets were dropped on Vwire interfaces due to being incorrectly detected as a land attack when the source and destination ports of the BFD packets were different. For more information: https://docs.paloaltonetworks.com/pan-os/11-1/pan-os-release-notes/pan-os-11-1-13-known-and-addressed-issues/pan-os-11-1-13-addressed-issues
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