Date: Wed, 09 Mar 2005 12:32:38 -0800 From: Charlie Schluting <charlie@schluting.com> To: net@freebsd.org Subject: Re: tcpdump/bpf and seeing .1q tags Message-ID: <422F5D66.6020808@schluting.com> In-Reply-To: <422F5CF6.9070906@schluting.com> References: <20050309111759.O97008@schluting.com> <3aa4b0ab62a3d4855fdc62383a77b9d5@mac.com> <422F5CF6.9070906@schluting.com>
next in thread | previous in thread | raw e-mail | index | archive | help
Charlie Schluting wrote: > Charles Swiger wrote: > >> On Mar 9, 2005, at 2:22 PM, Charlie Schluting wrote: >> >>> More importantly, I'm trying to figure out if a bpf read will see >>> them as well. Any insight on this? >> >> >> >> Yes, or it will if you use promisc mode and an appropriate BPF filter: >> > > So promisc is enabled in my case. > > This seems to imply that the bpf will always see the vlan tags. (I don't > want to.. that was the point of my question) > > I believe this is starting to make sense. Thanks for your reply. Oh! Er.. I hit send too fast. So a BPF is supposed to ignore vlan tags unless 'vlan' is specified?? -Charlie
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?422F5D66.6020808>