From: Joe Chang (changjoe@earthlink.net)
Date: Wed Dec 18 2002 - 10:23:43 GMT-3
There might be something about your network that I'm not understanding
correctly, because my immediate answer is to remove all tunnels from the
network. But of course there must be a very intelligent reason for you to be
trying to accomplish multicasting with tunnels. What would that reason be?
> Yes the scenario is as you have described the source is multicast server
on
> LAN & the receivers are through tunnel from router 1, is there a way I
can
> decrease the traffic at the serial interface when both receivers are
using
> the multicast traffic , I am expecting router 1 to do the replication of
the
> traffic going tunnels, which is not happening , since the traffic on the
> serial keeps increasing as I increase the number tunnels, is there a way
> around to keep the traffic between the Router to Router1 constant to the
> multicast traffic , inspite of adding number of tunnels.
>
>
> Rgds
> Adarsh
> ----- Original Message -----
> From: "Joe Chang" <changjoe@earthlink.net>
> To: <ccielab@groupstudy.com>
> Sent: Tuesday, December 17, 2002 11:34 PM
> Subject: Re: Multicast ISSUE
>
>
> > It seems that you have enabled pim on the physical interfaces between
all
> > the routers, as well as between the tunnel endpoints (assuming the
tunnels
> > for R2 and R3 end at the multicast server.) When the network first
starts
> up
> > the leaf routers will have to choose whether to use its tunnel or
physical
> > interface as its RPF interface for group 239.255.255.255. Since the
tunnel
> > is only one hop back to the source, the prune will be requested for the
> > physical interface. The server router will then prune its serial
interface
> > from its oil list, and have to send out one multicast packet for each
> > tunnel, thereby doubling the traffic.
> >
> > ----- Original Message -----
> > From: "Adarsh Singh" <adarshs@hclinfinet.net>
> > To: "Don" <seadon@attbi.com>; "Sean Garrett" <SGarrett@cnitech.com>
> > Cc: <ccielab@groupstudy.com>
> > Sent: Tuesday, December 17, 2002 1:40 AM
> > Subject: Multicast ISSUE
> >
> >
> > > Hi Don,
> > >
> > > I have this typical problem with multicast :
> > >
> > > Multicast Server(router)----LL(64Kbps)----Router
> 1-----tunne1 ----R2(each
> > > tunnel traffic is 20 Kbps)
> > >
> > > ------tunnel2 ---R3
> > >
> > >
> > > Now as the number of tunnels(gre) increases at the router 1 , the
> traffic
> > > increases propotinally for the 64 Kbps leased line .
> > > So the mulicast is not taking place in real sense .
> > >
> > >
> > >
> > > The commands used at tunnel are as follows :
> > >
> > > interface Tunnel2
> > > ip address 172.168.12.1 255.255.255.252
> > > ip directed-broadcast
> > > ip pim sparse-dense-mode
> > > ip igmp join-group 239.255.255.255
> > > load-interval 30
> > > tunnel source 10.65.12.233
> > > tunnel destination 10.74.5.9
> > >
> > > interface FastEthernet0
> > > description connected to EthernetLAN
> > > ip address 192.168.10.85 255.255.255.0 secondary
> > > ip directed-broadcast
> > > ip pim sparse-dense-mode
> > > ip igmp join-group 239.255.255.255
> > > load-interval 30
> > > speed auto
> > > half-duplex
> > >
> > >
> > > interface Serial1
> > > description connected to infinet for VPN
> > > ip address 10.65.7.82 255.255.255.252
> > > ip accounting output-packets
> > > ip pim sparse-dense-mode
> > > ip igmp join-group 239.255.255.255
> > > load-interval 30
> > >
> > >
> > > Do let me know if someone has ideas of where i an making a mistake.
> > >
> > >
> > > Rgds
> > > Adarsh Singh
> > > .
> > .
> .
.
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