Bug ID 1041381: Tcpdump capture may not include broadcast and multicast egress (generated by the system and being sent out) when "--dls true" option is used

Last Modified: Jan 06, 2022

Bug Tracker

Affected Product:  See more info
F5OS Velos(all modules)

Fixed In:
1.3.0

Opened: Aug 17, 2021
Severity: 3-Major

Symptoms

When DLS feature is turned on using "--dls true" option, broadcast and multicast packets generated by the host CPUs of the system and egressing out of the VELOS system will not be part of the capture. The default mode when no "--dls" option is specified is "--dls false", which has no issue

Impact

Capture will not be complete and will not contain the egressing broadcast and multicast packets.

Conditions

The 'DLS' feature of tcpdump is turned on by explicitly invoking packet capture with the non-default mode "--dls true"

Workaround

Use the default mode ( i.e no "--dls option specified) or explicitly turn off dls mode ("--dls false")

Fix Information

None

Behavior Change