a question about igmp

Archived from groups: comp.dcom.lans.ethernet (More info?)

wld wrote:
> Hi,
> I have a switch which support rip and has igmp query/snooping ability.
> I have config. this switch as follows:
> vlan1 -- port 1 to 20 vlan ip addr. 192.168.10.254 255.255.255.0
> vlan2 -- port 21 to 40 vlan ip addr 192.168.20.254 255.255.255.0
> This switch has enabled rip and igmp query/snooping.
>
> It works fine when both multicast server and multicast client connect vlan1 only.
> but does not work when multicast server at vlan1 and multicast client at vlan2.
> (ping each other ok).
> Does that means I need a switch which support multicast routing protocol?
>
> Thanks,
>
> sy

Yes, you need a router to route the multicast between vlan1 and vlan2.


Mirko
--
http://www.nwlab.net - Das Netzwerkportal

Archived from groups: comp.dcom.lans.ethernet (More info?)

Mirko Kulpa <usenet@euro-mail.de> wrote in message news:<ci8lph$8t9$1@news.kamp.net>...
> wld wrote:
> > Hi,
> > I have a switch which support rip and has igmp query/snooping ability.
> > I have config. this switch as follows:
> > vlan1 -- port 1 to 20 vlan ip addr. 192.168.10.254 255.255.255.0
> > vlan2 -- port 21 to 40 vlan ip addr 192.168.20.254 255.255.255.0
> > This switch has enabled rip and igmp query/snooping.
> >
> > It works fine when both multicast server and multicast client connect vlan1 only.
> > but does not work when multicast server at vlan1 and multicast client at vlan2.
> > (ping each other ok).
> > Does that means I need a switch which support multicast routing protocol?
> >
> > Thanks,
> >
> > sy
>
> Yes, you need a router to route the multicast between vlan1 and vlan2.
>
>
> Mirko

Thanks,
I have a rip enabled and ping works between a host on vlan1 and a host
on vlan2. you mean I need a router which support multicast routing
protocol.
right?

sy

Archived from groups: comp.dcom.lans.ethernet (More info?)

>
> Thanks,
> I have a rip enabled and ping works between a host on vlan1 and a host
> on vlan2. you mean I need a router which support multicast routing
> protocol.
> right?
>
> sy

Yes. Something that supports DVMRP or PIM or the like. (probabably DVMRP
would be the way to go - easier to set up than PIM)

Wouldn't have to be a router per se - could be a layer 3 switch that has
that capability (I think for instance the whole Exetreme Networks
product line, as well as the 8600 nortel passports all support that)