From: shha (shha77@gmail.com)
Date: Sun Sep 17 2006 - 12:08:26 ART
Can you add *ip directed-broadcast* on R2 interface 3.Normally router block
broadcast traffic.
On 9/16/06, sabrina pittarel <sabri_esame@yahoo.com> wrote:
>
> Hi,
> I'm trying to use the multicast helper feature to convert from multicast
> to directed broadcast and into multicast again.
> Topology
>
> Mcast transport netw
> Source ---------- R3 ---- .....------ R2 ------- Receiver
> 225.25.25.25 1 2 3 4
>
> On R3 interface 1 I convert 225.25.25.25 into directed broadcast for R2
> interface 3 subnet (ex 129.1.23.255)
> I have no problem getting this directed brodcast traffic to R2 interface
> 3.
> On R2 interface 3 I convert broadcast back into 225.25.25.25.
> On R2 interface 4 I'm statically joining the 225.25.25.25 group (for
> testing purposes).
> PIM Dense mode is enabled on R3 interface 1, R2 interface 4
>
> I cannot make this working if I don't enable pim on R2 interface 3 as
> well.
> But if I do so, R2 complains because it is receiving multicast traffic on
> an interface where there are no PIM neighbors and the received traffic is
> not sourced from the connected network:
>
> *Sep 16 22:16:52.039: %MROUTE-3-NO_PIM_NBR: There is no PIM neighbor on
> this IDB: Serial1/1 -Process= "PIM Process", ipl= 0, pid= 132
>
> Has anyone been able to make this working without PIM on R2 interface 3?
>
> The configureation is the following:
>
> R3 interface 1:
> -----------------
>
> ip forward-protocol udp 31337
>
> interface Serial1/2
> ip address 129.1.13.3 255.255.255.0
> ip pim dense-mode
> ip multicast helper-map 225.25.25.25 129.1.23.255 100
> encapsulation ppp
> serial restart-delay 0
>
> access-list 100 permit udp 129.1.17.0 0.0.0.255 host 225.25.25.25 eq 31337
>
> R3 interface 2:
> -----------------
>
> interface Serial1/3
> ip address 129.1.23.3 255.255.255.0
> ip directed-broadcast
> encapsulation ppp
>
>
> R2 interface 3:
> -----------------
>
> ip forward-protocol udp 31337
>
> interface Serial1/1
> ip address 129.1.23.2 255.255.255.0
> ip pim dense-mode <<<<< without it it doesn't work...
> ip multicast helper-map broadcast 225.25.25.25 100
> encapsulation ppp
>
> access-list 100 permit udp 129.1.17.0 0.0.0.255 any eq 31337
>
> R2 interface 4:
> -----------------
>
> interface Ethernet0/0
> description "to SW1 e0/2"
> ip address 192.10.1.2 255.255.255.0
> ip pim dense-mode
> ip igmp join-group 225.25.25.25
>
>
> **************************************************
> On R2 Without the "pim" cmd on R3 interface 3:
> **************************************************
>
> "deb ip packet" and "deb ip mpacket" output:
>
> *Sep 17 01:13:28.622: IP: s=129.1.17.7 (Serial1/1), d=255.255.255.255, len
> 44, rcvd 2
> *Sep 17 01:13:28.622: UDP src=49182, dst=31337
>
> sh ip mroute
> IP Multicast Routing Table
> Flags: D - Dense, S - Sparse, B - Bidir Group, s - SSM Group, C -
> Connected,
> L - Local, P - Pruned, R - RP-bit set, F - Register flag,
> T - SPT-bit set, J - Join SPT, M - MSDP created entry,
> X - Proxy Join Timer Running, A - Candidate for MSDP Advertisement,
> U - URD, I - Received Source Specific Host Report,
> Z - Multicast Tunnel, z - MDT-data group sender,
> Y - Joined MDT-data group, y - Sending to MDT-data group
> Outgoing interface flags: H - Hardware switched, A - Assert winner
> Timers: Uptime/Expires
> Interface state: Interface, Next-Hop or VCD, State/Mode
>
> (*, 225.25.25.25), 00:00:03/00:02:56, RP 0.0.0.0, flags: DCL
> Incoming interface: Null, RPF nbr 0.0.0.0
> Outgoing interface list:
> Ethernet0/0, Forward/Dense, 00:00:03/00:00:00
>
> (*, 224.0.1.40), 00:00:03/00:02:56, RP 0.0.0.0, flags: DCL
> Incoming interface: Null, RPF nbr 0.0.0.0
> Outgoing interface list:
> Ethernet0/0, Forward/Dense, 00:00:03/00:00:00
>
>
> *************************************
> On R2 WITH the ip pim dense command
> *************************************
>
> "deb ip packet" and "deb ip mpacket" output:
>
> *Sep 17 01:16:50.618: IP: s=129.1.17.7 (Serial1/1), d=255.255.255.255, len
> 44, rcvd 2
> *Sep 17 01:16:50.618: UDP src=53508, dst=31337
> *Sep 17 01:16:50.618: IP(0): s=129.1.17.7 (Serial1/1) d=225.25.25.25(Ethernet0/0) id=0, ttl=252, prot=17, len=44(44), mforward
>
>
> sh ip mroute
>
> IP Multicast Routing Table
> Flags: D - Dense, S - Sparse, B - Bidir Group, s - SSM Group, C -
> Connected,
> L - Local, P - Pruned, R - RP-bit set, F - Register flag,
> T - SPT-bit set, J - Join SPT, M - MSDP created entry,
> X - Proxy Join Timer Running, A - Candidate for MSDP Advertisement,
> U - URD, I - Received Source Specific Host Report,
> Z - Multicast Tunnel, z - MDT-data group sender,
> Y - Joined MDT-data group, y - Sending to MDT-data group
> Outgoing interface flags: H - Hardware switched, A - Assert winner
> Timers: Uptime/Expires
> Interface state: Interface, Next-Hop or VCD, State/Mode
>
> (*, 225.25.25.25), 00:03:23/stopped, RP 0.0.0.0, flags: DCL
> Incoming interface: Null, RPF nbr 0.0.0.0
> Outgoing interface list:
> Ethernet0/0, Forward/Dense, 00:03:23/00:00:00
> Serial1/1, Forward/Dense, 00:01:31/00:00:00
>
> (129.1.17.7, 225.25.25.25), 00:01:33/00:02:58, flags: LT
> Incoming interface: Serial1/1, RPF nbr 0.0.0.0
> Outgoing interface list:
> Ethernet0/0, Forward/Dense, 00:01:33/00:00:00
>
> (*, 224.0.1.40), 00:03:23/00:02:41, RP 0.0.0.0, flags: DCL
> Incoming interface: Null, RPF nbr 0.0.0.0
> Outgoing interface list:
> Ethernet0/0, Forward/Dense, 00:03:23/00:00:00
>
>
> Sabrina
>
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