forcing IGMPv2

[Anthony Petropoulos]

Thanx! :-)

Pantws kai IP_ADD_MEMBERSHIP na kaneis pali IGMPv3 request stelnei, apla
xwris source filter. Dystyxws einai sto idio vlan o apostoleas kai oi
apodektes kai den yparxei router. To igmp to 8elw gia na doylepsei to
snooping sto switch.

Per interface will do. Thanx kai pali.



On 5/30/06, d.a.glynos <glynos at storm.cs.unipi.gr> wrote:
>
> On Mon, 29 May 2006, Anthony Petropoulos wrote:
> > Geia sas,
> >
> > Gnwrizei kaneis an/pws ginetai mia efarmogh na steilei IGMPv2 request
> > (kai oxi IGMPv3) gia na kanei join ena multicast group, enw o pyrhnas
> > einai IGMPv3 enabled? Kapoio option sto socket isws?
> >
> > Eyxarhstw.
>
> Rixnontas mia grhgorh matia sto source:
> /usr/src/linux/net/ipv4/igmp.c
> kai sto doc:
> http://www-static.cc.gatech.edu/~gantsich/IGMPv3/IGMPv3-TR.pdf
>
> h ru8mish de ginetai per-efarmogh alla per-interface. Gia na valei o admin
> thn eth0 se v2 mode:
>
> echo "2" > /proc/sys/net/ipv4/conf/eth0/force_igmp_version
>
> To default mode e3artatai apo ton upstream router, o opoios an uposthrizei
> v2 (kai sunepws stelnei tetoia queries stous hosts) 8etei ton purhna tou
> host se v2 compatibility mode (des to igmp_timer_expire() sta sources).
> Se periptwsh pou o router den exei dei3ei shmadia v1 h' v2 tote paizeis
> se v3.
>
> H kyria diafora meta3u v2 kai v3 einai ta source filters.
>
> An esy de xrhsimopoihseis source filters kai apla arkesteis sto
> IP_{ADD/DROP}_MEMBERSHIP tote to application sou paragei paketa pou einai
> compatible me oles tis ekdoseis (v1, v2, v3).
>
> hope this clarifies things.
> dimitris
>
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