From: Adarsh Singh (adarshs@hclinfinet.net)
Date: Wed Dec 18 2002 - 02:15:30 GMT-3
Hi Joe ,
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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