Re: Linux, tcpdump and vlan

Stephen Hemminger [off-list ref] writes:

Not at runtime, acceleration is always on if you compile kernel with vlan
support.  That is a design mistake as far as I can tell.

I think so.

quoted

However seeing unknown tags on master device (with tcpdump etc)
would certainly be useful.

Only in promiscuous mode. In some sense tag is part of the mac address.

Well, in "some sense" maybe, though the MAC address is rather
strictly defined to be a 6-octet value. I can live with
promiscous anyway, it's really minor issue.
-- 
Krzysztof Halasa