Description

This article describes the explanation of the syslog message "fpc0 LBCM-L2,brcm_l2pt_proto_update(),XXXX:Failed to delete L2PT XXXX protocol" and its solution.

Symptoms

Below logs are observed in messages file under /var/log directory.

 

Aug 7 07:36:00 switch-1 fpc0 LBCM-L2,brcm_l2pt_ifbd_del_all(),1795:L2PT ifbd del all: failed to delete L2PT ELMI protocol 
Aug 7 07:36:00 switch-1 fpc0 LBCM-L2,brcm_l2pt_ifbd_del_all(),1826:L2PT ifbd del all: failed to delete L2PT UDLD protocol 
Aug 7 07:36:00 switch-1 fpc0 LBCM-L2,brcm_l2pt_ifbd_del_all(),1853:L2PT ifbd del all: failed to delete L2PT 8021X protocol 
Aug 7 07:36:00 switch-1 fpc0 LBCM-L2,brcm_l2pt_ifbd_del_all(),1871:L2PT ifbd del all: failed to delete L2PT MMRP protocol 


Aug 7 08:15:01 switch-1 fpc0 LBCM-L2,brcm_l2pt_proto_update(),1355:Failed to delete L2PT ELMI protocol 
Aug 7 08:15:01 switch-1 fpc0 LBCM-L2,brcm_l2pt_proto_update(),1413:Failed to delete L2PT UDLD protocol 
Aug 7 08:15:01 switch-1 fpc0 LBCM-L2,brcm_l2pt_proto_update(),1574:Failed to delete L2PT 8021X protocol 
Aug 7 08:15:01 switch-1 fpc0 LBCM-L2,brcm_l2pt_proto_update(),1596:Failed to delete L2PT MMRP protocol


Aug 7 08:36:02 switch-1 fpc0 LBCM-L2,brcm_l2pt_ifbd_del_all(),1795:L2PT ifbd del all: failed to delete L2PT ELMI protocol 
Aug 7 08:36:02 switch-1 fpc0 LBCM-L2,brcm_l2pt_ifbd_del_all(),1826:L2PT ifbd del all: failed to delete L2PT UDLD protocol 
Aug 7 08:36:02 switch-1 fpc0 LBCM-L2,brcm_l2pt_ifbd_del_all(),1853:L2PT ifbd del all: failed to delete L2PT 8021X protocol 
Aug 7 08:36:02 switch-1 fpc0 LBCM-L2,brcm_l2pt_ifbd_del_all(),1871:L2PT ifbd del all: failed to delete L2PT MMRP protocol

Solution

The "failed to delete L2PT XXXX protocol" logs are observed even when L2PT is not configured on the device.

 

This issue is caused because L2PT delete API is getting invoked for pseudo IFLs frequently.

This is a control plane behavior and has no impact on the forwarding plane. Hence, transit traffic will not be affected.

 

The issue is addressed in below versions

junos:20.4R3-S7 junos:21.1R3-S5 junos:21.2R3-S5 junos:21.3R3-S4 junos:21.4R3-S3 junos:22.1R3-S2 junos:22.2R3 junos:22.3R2 junos:22.3R3 junos:22.4R2 junos:23.1R1.

Modification History

Added fix versions in the solutions section of the KB.