Opened 9 years ago
Last modified 9 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 9 years ago by perry
comment:2 Changed 9 years ago by brad
Should be able to use ethtool to turn off "rxvlan" and "txvlan" offloads.
Linux makes the network cards do this (if they support it). It's very frustrating.