Opened 7 years ago

Last modified 7 years ago

#390 new defect

Investigate how VLAN tags work under Linux Native

Reported by: salcock Owned by: salcock
Priority: major Milestone: libtrace3
Component: libtrace-library Version:
Keywords: Cc:

Description

Today we noticed that using int: or ring: to capture traffic via a mirrored switch port was resulting in the VLAN tags being stripped from the packets. I didn't have time to follow this up too closely, but we want to be careful about avoiding any situations where VLAN tags are being popped / discarded prior to capture.

This is particularly important for our own capture setups, as we will probably be using either ring: or dpdk: in the future and we don't want to losing valuable information about the underlying network if we can avoid it.

Change History (2)

comment:1 Changed 7 years ago by perry

Linux makes the network cards do this (if they support it). It's very frustrating.

comment:2 Changed 7 years ago by brad

Should be able to use ethtool to turn off "rxvlan" and "txvlan" offloads.

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