Customer see lot of these log messages:
Nov 22 18:26:13 labroot member1-fpc3 jnh_vbf_flow_ktree_free(6647): vbf flow 3887 not found
Nov 22 18:26:13 labroot member1-fpc3 jnh_vbf_flow_table_remove_ifl(7723): Didn't find prefix PPPoE ifl-2453/1 for ifl=pp0.3221273494 (3887)
Nov 22 18:26:13 labroot member1-fpc3 jnh_pppoe_session_terminate(1202): flow table remove sifl=3887 error=15
Nov 22 18:26:13 labroot member1-fpc4 jnh_vbf_flow_ktree_free(6647): vbf flow 3887 not found
Nov 22 18:26:13 labroot member1-fpc5 jnh_vbf_flow_ktree_free(6647): vbf flow 3887 not found
Nov 22 18:26:13 labroot kernel: tcp_auth_ok: Packet from 10.172.12.42:179 missing MD5 digest
Nov 22 18:26:13 labroot member1-fpc4 jnh_vbf_flow_ktree_free(6647): vbf flow 4288 not found
Nov 22 18:26:13 labroot member1-fpc5 jnh_vbf_flow_ktree_free(6647): vbf flow 4288 not found
Nov 22 18:26:13 labroot member1-fpc3 jnh_vbf_flow_table_remove_ifl(7723): Didn't find prefix PPPoE ifl-2453/117 for ifl=pp0.3221273491 (4288)
Nov 22 18:26:13 labroot member1-fpc3 jnh_pppoe_session_terminate(1202): flow table remove sifl=4288 error=15
I have verified internally and those logs will come for PPP subscriber logout scenario. Those logs are normal and not service impacting one.