From: fingham@cox.net
Date: Wed Nov 05 2003 - 17:45:59 GMT-3
In IGMP ver 1 the DR and the Querier are the same and is the highest IP address of PIM routers. In IGMP ver 2 the DR is the highest IP address and the Querier is the lowest IP address. Explained nicely in the Williamson book.
HTH, Fred
>
> From: "ccie2be" <ccie2be@nyc.rr.com>
> Date: 2003/11/04 Tue AM 10:54:04 EST
> To: "Group Study" <ccielab@groupstudy.com>, "bhescock"
> <bhescock@cisco.com>
> Subject: Re: Multicast: Querier vs DR
>
> Thanks for getting back to me.
>
> That being the case, how is it ever possible that both functions, DR and
> Querier, would be on the same router if there's another router on the same
> ethernet? Does it depend on which version of IGMP is running or which mode
> of PIM, Dense or Sparse?
>
>
> ----- Original Message -----
> From: "bhescock" <bhescock@cisco.com>
> To: "ccie2be" <ccie2be@nyc.rr.com>
> Sent: Tuesday, November 04, 2003 10:27 AM
> Subject: Re: Multicast: Querier vs DR
>
>
> > DR is the highest ip address on that network, Querier is the lowest ip
> address on that network.
> >
> > ccie2be wrote:
> >
> > > Hi group,
> > >
> > > I'm trying to understand the situation that exists when there are
> multiple PIM
> > > routers on a common Ethernet:
> > >
> > > R1 R2
> > > | |
> > > -----------------
> > > host host
> > >
> > > I know that sometimes the same router will be both the DR and the
> Querier but
> > > at other times these functions will be on different routers.
> > >
> > > Can someone help me out and explain when these functions will be on the
> same
> > > router and when they won't?
> > >
> > > Thanks in advance.
> > >
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