Regression in vr - not receiveing multicast
Pyun YongHyeon
pyunyh at gmail.com
Thu Dec 11 17:31:17 PST 2008
On Wed, Dec 10, 2008 at 08:06:16AM +0100, Goran Lowkrantz wrote:
> --On December 9, 2008 12:53:05 +0100 Goran Lowkrantz
> <glz at hidden-powers.com> wrote:
>
> >--On December 9, 2008 20:47:23 +0900 Pyun YongHyeon <pyunyh at 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.
> >
>
>
> I have tried with 'options MROUTING' and it didn't work.
>
> Did I miss something? Do I have to install and run mrouted also?
>
> It seems like maybe the first two packages are accepted after registration
> as I don't lose the routes until after about 6 min uptime. But to get
> further updates, I need the interfaces in promisc.
>
> So, next step?
FYI: I've disabled multicast perfect filtering(r185962).
--
Regards,
Pyun YongHyeon
More information about the freebsd-stable
mailing list