I think it is the wrap thing, if you copy the whole link, it should point to the right place, but probably it only works for IE? not sure, but anyway, here is the contents:
"By default, the router uses IGMP Version 2, which allows such features as the IGMP query timeout and the maximum query response time. All systems on the subnet must support the same version. The router does not automatically detect Version 1 systems and switch to Version 1, as did earlier releases of the Cisco IOS software. Configure the router for Version 1 if your hosts do not support Version 2." Kent ""richard dumoulin"" wrote in message [EMAIL PROTECTED]">news:[EMAIL PROTECTED]... > Kent Yu wrote: > > > > Mark, > > > > According to this link, the current IOS versions do not switch > > when a v1 is > > detected: > > > > > http://www.cisco.com/univercd/cc/td/doc/product/software/ios121/121cgcr/ip_c > > /ipcprt3/1cdmulti.htm#xtocid28 > > You could be more specific, there's a lot of stuff in this link, thx. > > > > > > Kent > > ""Vicuna, Mark"" wrote in message > > [EMAIL PROTECTED]">news:[EMAIL PROTECTED]... > > > they dont query both hosts.. thats why v2 is backwards > > compatible. the > > > igmp querier is 'switched off' when a v1 router is detected. > > > > > > > > > hth, > > > Mark. > > > > -----Original Message----- > > > > From: richard dumoulin [mailto:[EMAIL PROTECTED]] > > > > Sent: Saturday, 17 August 2002 01:29 > > > > To: [EMAIL PROTECTED] > > > > Subject: Re: Multicast DR and IGMP querier [7:51458] > > > > > > > > > > > > Here it is !! That was my confusion, because it seems that > > > > this capability > > > > was added in order to query IGMP version 1 hosts. With IGMP > > > > version 2 it > > > > seems you do not need it. But what happen then if you have > > > > both IGMP v2 and > > > > PIM DR's ?? Do they both query the hosts ? > > > > > > > > Any Multicast expert right there ? > > > > > > > > Regards. > > > > ----- Original Message ----- > > > > From: "Kent Yu" > > > > To: "richard dumoulin" ; > > > > Sent: Friday, August 16, 2002 4:42 PM > > > > Subject: Re: Multicast DR and IGMP querier [7:51458] > > > > > > > > > > > > > Do you mean that in IOS if a router is running PIM and is > > > > a DR, it will > > > > > query even if it sees IGMP query messages from another > > > > router with lower > > > > ip > > > > > address? > > > > > > > > > > Kent > > > > > > > > > > ----- Original Message ----- > > > > > From: "richard dumoulin" > > > > > To: "Kent Yu" ; > > > > > Sent: Friday, August 16, 2002 10:34 AM > > > > > Subject: Re: Multicast DR and IGMP querier [7:51458] > > > > > > > > > > > > > > > > RFC's are great, but have to look also at how Cisco IOS > > > > implements the > > > > > rfc. > > > > > > PIM DR's use IGMP to query the hosts too !! > > > > > > > > > > > > Regards. > > > > > > ----- Original Message ----- > > > > > > From: "Kent Yu" > > > > > > To: "richard dumoulin" ; > > > > > > Sent: Friday, August 16, 2002 4:20 PM > > > > > > Subject: Re: Multicast DR and IGMP querier [7:51458] > > > > > > > > > > > > > > > > > > > Richard, > > > > > > > > > > > > > > As we mentioned yesterday, only routers speak PIM, I > > am > > > > not sure where > > > > > you > > > > > > > got the impression that PIM DRs query the hosts, > > > > routers only use IGMP > > > > > to > > > > > > > query the hosts. > > > > > > > > > > > > > > I think as many have suggested, nothing is better than > > > > reading the > > > > > specs, > > > > > > in > > > > > > > this case, RFC 2117 should explain this pretty well. > > > > > > > > > > > > > > HTH > > > > > > > Kent > > > > > > > > > > > > > > ----- Original Message ----- > > > > > > > From: "richard dumoulin" > > > > > > > To: > > > > > > > Sent: Friday, August 16, 2002 3:47 AM > > > > > > > Subject: Re: Multicast DR and IGMP querier [7:51458] > > > > > > > > > > > > > > > > > > > > > > Raj Santiago wrote: > > > > > > > > > > > > > > > > > > Hi Richard, > > > > > > > > > > > > > > > > > > > > > > > > > > > Okay your question is basically what is a "IGMP > > querier and > > > > > > > > > Multicast Designated Router" > > > > > > > > > > > > > > > > > > > > > > > > > > > Igmp querier is the router in charge to see if any > > > > hosts want > > > > > > > > > to listen to a multicast stream. > > > > > > > > > > > > > > > > > > Designated Router is the router is charge to > > facilitate pim > > > > > > > > > join, prune and register messages(This also > > depends on the > > > > > > > > > mode of pim your running, im being very abstract > > here); > > > > > > > > > Basically the multicast routing part. > > > > > > > > > > > > > > > > But it seems to me that the DR will also query the > > hosts!! > > > > > > > > > > > > > > > > > > > > > > > > > > > Under IGMP version 1, the router with the highest > > ip address > > > > > > > > > was BOTH the IGMP querier and Designated Router. > > > > > > > > > > > > > > > > > > Under IGMP version 2, the router with highest ip > > > > address is the > > > > > > > > > DR and the router with the lowest ip address is > > the > > > > IGMP querier. > > > > > > > > > > > > > > > > If I am right, both the DR and the querier will > > query > > > > the hosts ?? > > > > > > > > > > > > > > > > > > > > > > > > Cheers. > > > > [EMAIL PROTECTED] Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=51540&t=51458 -------------------------------------------------- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
