Description

The following log will flood constantly under 'show log messages' -

lag_add_cifl_to_pifl: added a new ifl xe-3/2/1.32767 to bundle demux0

Symptoms

In subscriber environment where aggregate interface is used for connecting subscribers below logs can be seen in message file-

Log messages seen:

Nov 29 14:27:27 MX960-RE kernel: if_pfe_lag_if_options_proc(): 12658: adding targeted link xe-3/2/1, wt 1

Nov 29 14:27:27 MX960-RE kernel: lag_add_cifl_to_pifl: added a new ifl xe-3/2/1.32767 to bundle demux0

Nov 29 14:27:27 MX960-RE kernel: lag_add_cifl_to_pifl: link xe-3/2/1.32767 (lidx=4) attached to bundle ae1.32767

Nov 29 14:27:27 MX960-RE kernel: if_pfe_lag_if_options_proc(): 12658: adding targeted link xe-7/0/8, wt 65535

Nov 29 14:27:27 MX960-RE kernel: lag_add_cifl_to_pifl: added a new ifl xe-7/0/8.32767 to bundle demux0

Nov 29 14:27:27 MX960-RE kernel: lag_add_cifl_to_pifl: link xe-7/0/8.32767 (lidx=5) attached to bundle ae1.32767

Nov 29 14:27:27 MX960-RE kernel: if_pfe_lag_if_options_proc(): 12658: adding targeted link xe-4/3/0, wt 65535

Nov 29 14:27:27 MX960-RE kernel: lag_add_cifl_to_pifl: added a new ifl xe-4/3/0.32767 to bundle demux0

Nov 29 14:27:27 MX960-RE kernel: lag_add_cifl_to_pifl: link xe-4/3/0.32767 (lidx=3) attached to bundle ae1.32767

Nov 29 14:27:27 MX960-RE kernel: if_pfe_lag_if_options_proc(): 12658: adding targeted link xe-0/3/1, wt 65535

Nov 29 14:27:27 MX960-RE kernel: lag_add_cifl_to_pifl: added a new ifl xe-0/3/1.32767 to bundle demux0

Nov 29 14:27:27 MX960-RE kernel: lag_add_cifl_to_pifl: link xe-0/3/1.32767 (lidx=2) attached to bundle ae1.32767

Nov 29 14:27:27 MX960-RE kernel: if_pfe_lag_if_options_proc(): 12658: adding targeted link xe-0/2/0, wt 65535

Nov 29 14:27:27 MX960-RE kernel: lag_add_cifl_to_pifl: added a new ifl xe-0/2/0.32767 to bundle demux0

Nov 29 14:27:27 MX960-RE kernel: lag_add_cifl_to_pifl: link xe-0/2/0.32767 (lidx=1) attached to bundle ae1.32767

Nov 29 14:27:27 MX960-RE kernel: if_pfe_lag_if_options_proc(): 12658: adding targeted link xe-0/0/0, wt 100

Nov 29 14:27:27 MX960-RE kernel: lag_add_cifl_to_pifl: added a new ifl xe-0/0/0.32767 to bundle demux0

Nov 29 14:27:27 MX960-RE kernel: lag_add_cifl_to_pifl: link xe-0/0/0.32767 (lidx=0) attached to bundle ae1.32767

Nov 29 14:27:27 MX960-RE kernel: if_pfe_ps_vlan_ifd_update punt vbf pseudo ifl priv flags 0x200400

Nov 29 14:27:52 MX960-RE kernel: if_pfe_ps_vlan_ifd_update punt vbf pseudo ifl priv flags 0x200400

Solution

Meaning:

This log message is logged when 802_3AD is configured on child ifl, Child IFL will be added to its Parent IFL. This is unconditional log in function lag_add_cifl_to_pifl. When the subscribers come up, whenever we publish IFF over the demux, such logs will come. To note here, if there are no subscriber activities, such logs should not be seen.
  
The messages like "kernel: lag_add_cifl_to_pifl: added a new ifl xe-3/3/0.32767 to bundle demux0" were displaying the bundle's IFD name alone. Since such messages will be huge in number if there are a huge number of dynamic subscribers logging in, these messages give a false impression that they are coming in a loop. Hence, to make the message more meaningful, we have modified it to display "IFD.IFL.

Modification History

KB has been created.