Date: Tue, 09 Dec 2008 12:53:05 +0100 From: Goran Lowkrantz <glz@hidden-powers.com> To: pyunyh@gmail.com Cc: stable@freebsd.org Subject: Re: Regression in vr - not receiveing multicast Message-ID: <80D07D8C17DAC73D69DCDC9A@[172.16.2.124]> In-Reply-To: <20081209114723.GE33723@cdnetworks.co.kr> References: <C882ECF018726481EDA359B3@[172.16.2.124]> <20081209114723.GE33723@cdnetworks.co.kr>
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--On December 9, 2008 20:47:23 +0900 Pyun YongHyeon <pyunyh@gmail.com> wrote: > On Tue, Dec 09, 2008 at 10:40:17AM +0100, Goran Lowkrantz wrote: > > Hi, > > > > in July, vr had this problem and was fixed: > > <http://www.FreeBSD.org/cgi/query-pr.cgi?pr=125010>; > > <http://www.FreeBSD.org/cgi/query-pr.cgi?pr=125024>; > > > > but now it's back again! > > > > There was just one bug fix since then and I guess the fix is not > related with your issue. > > > On a system with the following: > > 7.1-PRERELEASE FreeBSD 7.1-PRERELEASE #3: Thu Oct 16 12:31:04 UTC 2008 > > > > I have to set all vr interfaces in promisc to get routing info. > > > > Using Quagga > > # pkg_info -Ix uagga > > quagga-0.99.10_3 Free RIPv1, RIPv2, OSPFv2, BGP4, IS-IS route > software > > > on an inner network using RIPv2 > > # ifmcstat -i vr0 > > vr0: > > inet xxx.xxx.xxx.xxx > > group 224.0.0.9 > > igmpv2 > > mcast-macaddr 01:00:5e:00:00:09 refcnt 1 > > group 224.0.0.1 > > mcast-macaddr 01:00:5e:00:00:01 refcnt 1 > > > > > > On the same box, we have some em devices also and they work without > any > problems. > > > > There is fundamental differences between em(4) and vr(4). The > vr(4) for VT6105M takes advantage of perfect multicast filtering > feature which is not present on all em(4) interface. Perfect > multicast filtering can reduce unwanted multicast traffics such > that it could save a lot of CPU cycles. The downside is that vr(4) > cannot accept multicast frames for a multicast group without > joining the multicast group first. > For multicast routing purpose I guess 'options MROUTING' kernel > option should be enabled to accept all multicast frames. > Does your kernel have that option? No it has not. I will create such a beast and return with stories. /glz
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