Description

This article explains the meaning of the following syslog message:

"%PFE-3: fpc0 Failed to get ifl for ifl index = XXX

 

Symptoms

You may see the following error message on QFX5K or EX4600 series in VXLAN environment. This can happen when the device receives DHCP packet via a remote vtep and L3 interface (IRB) is not assiged on the egress interface.

Even though there is no DHCP configuration, the packet injection happens and it fails to get IFL index as there is no IRB interface on the egress interface.

 

Oct 7 16:31:51.137 2022 Switch : %PFE-3: fpc0 Failed to get ifl for ifl index = 640

 

Solution

In that case, you can ignore the error message or you may assign L3 interface (IRB) to the vlan. The DHCP packet is forwarded to the egress interfaces as expected.  This has been solved by the fix of PR1721318

Modification History

2023-05-09 : First Version
2023-05-15 : Second Version - Added "This has been solved by the fix of PR1721318" in the solution.
2023-11-06 : The log message in the title was not corresponding to the case. Corrected the log message.