Date: Thu, 30 Apr 2015 12:08:35 +0600 From: Victor Sudakov <vas@mpeks.tomsk.su> To: Nikos Vassiliadis <nvass@gmx.com>, freebsd-questions@freebsd.org Subject: Re: tunneling L2 tagged traffic over IP Message-ID: <20150430060835.GA72072@admin.sibptus.tomsk.ru> In-Reply-To: <553F699C.9030409@gmx.com> References: <20150425174935.GA48023@admin.sibptus.tomsk.ru> <553C1F66.4060901@gmx.com> <20150426123629.GA48916@admin.sibptus.tomsk.ru> <20150427093355.GA86151@admin.sibptus.tomsk.ru> <553E400F.2040906@gmx.com> <20150427143952.GA94033@admin.sibptus.tomsk.ru> <553E9A07.1020900@gmx.com> <20150428034047.GA4874@admin.sibptus.tomsk.ru> <553F699C.9030409@gmx.com>
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Nikos Vassiliadis wrote: > > On 04/28/15 05:40, Victor Sudakov wrote: > > Fine. Maybe there are other ways to tunnel Ethernet without relying on > > if_bridge ? > > Then there is netgraph bridging, netgraph bridging AFAIK doesn't have > this feature, it doesn't filter out special MACs. > > You can ask at net@ for a script/help I believe. I definitely will because I have found a strange thing. The re0 NIC receives both tagged and untagged frames from a switch. When I monitor the incoming traffic with "nghook -a re0: lower", I see that both tagged and untagged frames are merged into one untagged stream, i.e. ng_ether somehow strips the vlan tag from frames. If I only knew how to obtain unmodified frames for further processing within the netgraph system, I would know how to build my transparent tunnel. I have not found any relevant messages or options I could set for ng_ether (like NGM_ETHER_SET_DONT_TOUCH_ANYTHING_DAMN_YOU maybe). -- Victor Sudakov, VAS4-RIPE, VAS47-RIPN sip:sudakov@sibptus.tomsk.ru
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