From: ccie2be (ccie2be@nyc.rr.com)
Date: Fri Jul 15 2005 - 12:01:17 GMT-3
Andy,
I'm pretty sure the config you have for R2 is missing a critical command.
By default, broadcasts aren't ever forwarded by routers. Therefore, for R2
to forward broadcasts onto E0, you need to add the ip directed-broadcast
command. Without this command, R2 after converting the mcast to broadcast
traffic will just drop it.
This is difficult to test without some sort of packet capture device hanging
off of R2's E0 interface but I'm 99% sure I'm correct.
HTH, Tim
-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of k c
Sent: Friday, July 15, 2005 8:12 AM
To: Andy; Cisco certification
Subject: <PCD!G Re: IP Multicast helper
Hi Andy,
I have 2 questions:
1) Does the config work in Sparse mode?
2) Do I need to type "join-group 224.1.1.1" anywhere?
Thanks,
Andy <trung@vnsystem.net> ;!!G
Hi,
Hope this could help
e0--R1--s0------s0--R2--e0
R1
Interface Ethernet0
ip address 10.1.1.1 255.255.255.0
ip multicast helper-map 224.1.1.1 172.16.255.3 100
ip pim dense-mode
ip forward-protocol udp 2000
access-list 100 permit any any udp 2000
interface S0
ip address 172.16.255.1 255.255.255.252
ip directed-broadcasts
R2
Interface Serial0
ip address 172.16.255.2 255.255.255.252
ip multicast helper-map broadcast 224.1.1.1 100 ttl 15
interface Ethernet0
ip address 10.2.2.1 255.255.255.0
ip pim dense-mode
ip forward-protocol udp 2000
access-list 100 permit any any udp 2000
Andy
----- Original Message -----
From: "k c"
To:
Sent: Thursday, July 14, 2005 10:34 PM
Subject: IP Multicast helper
> Hi Group,
>
> In Config Guide, the example given is to convert broadcast -->
> Multicast --> broadcast. Is it possible to convert Multicast -->
> Broadcast --> Multicast? If not, suppose I have routers with the following
> connection:
> M.Src -- R1-- R2 -- R3 -- Receiver
> If R2 cannot run multicast and assuming not allow to build a GRE tunnel
> between R1 and R3. How can the multicast traffic reach R3 send from R1.
>
> Thanks,
>
>
> 8g;if8,h)&d;6e01/d;%3ie<5g
>
> _______________________________________________________________________
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>
>
%og+
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