Regression in vr - not receiveing multicast
glz at hidden-powers.com
Tue Dec 9 03:53:08 PST 2008
--On December 9, 2008 20:47:23 +0900 Pyun YongHyeon <pyunyh at gmail.com>
> 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 18.104.22.168
> > igmpv2
> > mcast-macaddr 01:00:5e:00:00:09 refcnt 1
> > group 22.214.171.124
> > 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.
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