This article discusses a scenario where BFT message is seen in syslog.

shell log below message can be seen.

Jun 28 05:24:41.249 LOG: Info] 

INTR: throttle 30sec TLCHIP[0]:tl.dlu.dlu_alpha.protect.interrupts.status:detected_bft_mem(0): (Count:4)

[Jun 28 05:24:41.250 LOG: Info] log_err:0x4

[Jun 28 05:24:41.250 LOG: Info] log_addr:0x400

[Jun 28 05:24:41.250 LOG: Info] Fault handling message posted - chip : 0, blk : 9, reg_name : tl.dlu.dlu_alpha.protect.interrupts.status, intr_vec : 0x4, log_err : 4, log_addr : 1024

[Jun 28 05:24:41.250 LOG: Info] 

INTR: throttle 30sec TLCHIP[0]:tl.dlu.intr.status:alpha_ptyerr(0): (Count:4)

BFT stands for Bloom Filter Table which is one of the modules within the FLT block of the lookup portion of the TL chip. It has two tables BFT0 and BFT1. BFT is used in lookup for a given prefix. These are transient and harmless logs, also the count of these interrupt is very less count (4) so should be nothing to worry.   

System tries to auto heal these errors and if not incrementing that means they have already been handled.

In case count is increasing heavily then Contact Support for further investigation and assistance.