From: Andy (trung@vnsystem.net)
Date: Sat Jul 16 2005 - 01:26:34 GMT-3
Yes Tim, you are right, as usual ;-)
Thanks
----- Original Message -----
From: "ccie2be" <ccie2be@nyc.rr.com>
To: "'k c'" <jwongccie@yahoo.com.hk>; "'Andy'" <trung@vnsystem.net>; "'Cisco
certification'" <ccielab@groupstudy.com>
Sent: Friday, July 15, 2005 10:01 PM
Subject: RE: <PCD!G Re: IP Multicast helper
> 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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>
> _______________________________________________________________________
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