From: Victor Cappuccio (vcappuccio@gmail.com)
Date: Fri Dec 28 2007 - 14:17:30 ART
Hi There, sorry I do not have a rack to test this out, but I remember a
similar problem, when doing a multicast lab a few month ago, I think this
could be your case..
http://vcappuccio.wordpress.com/2007/12/24/sparsed-in-many-to-one/
I would suggest you to turn on in R5 the following command ip pim
send-rp-announce Loopback0 scope 16 group-list 10 bidir
also, please try this other commands on R2, R4 and R5 ip pim bidir-enable,
clear your rp tables and clear your mcast tables, and shoot the traffic
again, let us know your results.
Also I think that this could be an issue with the Register-Stop so I would
also try setting the ip stp threshold to infinite to see if that solves the
issue
Just my 2 cents
Thanks,
Victor Cappuccio
www.vcappuccio.wordpress.com
On Dec 28, 2007 5:43 PM, backbone systems <backbone.systems@gmail.com>
wrote:
> Hi all,
>
> R5 is hub and R2 and R4 are spokes . i have to use ip pim autorp listner
> command on all the routers. R5 loopback is the the rp .
> The problem i am having is that when i ping from R2 to R4 igmp group
> 224.1.1.1 i get first two replies but rest time out ?? why is this
> happening
> .
> i need real help
>
> Here is my config ,
>
> R2
>
> ip multicast-rou
>
> int fas0/0
> ip pim sparse-mode
>
> int ser0/0.25
> ip pim sparse mode
>
> ip pim auto-rp listner
>
>
> R5
>
> ip multicast-rou
>
> int ser0/0
> ip pim sparse-mo
>
> ip pim auto-rp listner
>
> ip pim send-rp-announce Loopback0 scope 16 group-list 10
> ip pim send-rp-discovery Loopback0 scope 16
>
> access-list 10 per 224.1.1.1
> access-list 10 per 224.2.2.2
>
> R4
>
> ip multicast-rou
>
> int ser0/0
> ip pim sparse-mo
>
> int fas0/0
> ip pim sparse-mo
> ip igmp join-g 224.1.1.1
> ip igmp join-g 224.2.2.2
>
> ip pim auto-rp listner
>
>
> ON R2 some outputs
>
> R2#sh ip mr
> 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
>
> (*, 224.2.2.2), 00:03:23/stopped, RP 5.5.5.5, flags: SP
> Incoming interface: Serial0/0.25, RPF nbr 5.5.245.5
> Outgoing interface list: Null
>
> (5.5.245.5, 224.2.2.2), 00:03:23/00:00:03, flags: PT
> Incoming interface: Serial0/0.25, RPF nbr 0.0.0.0
> Outgoing interface list: Null
>
> (*, 224.0.1.39), 00:29:24/00:02:55, RP 0.0.0.0, flags: DC
> Incoming interface: Null, RPF nbr 0.0.0.0
> Outgoing interface list:
> Serial0/0.25, Forward/Sparse, 00:29:25/00:00:00
>
> (*, 224.0.1.40), 00:29:33/stopped, RP 0.0.0.0, flags: DCL
> Incoming interface: Null, RPF nbr 0.0.0.0
> Outgoing interface list:
> Serial0/0.25, Forward/Sparse, 00:29:33/00:00:00
> FastEthernet0/0, Forward/Sparse, 00:29:33/00:00:00
>
> (5.5.5.5, 224.0.1.40), 00:29:24/00:02:52, flags: LT
> Incoming interface: Serial0/0.25, RPF nbr 5.5.245.5
> Outgoing interface list:
> FastEthernet0/0, Forward/Sparse, 00:29:24/00:00:00
>
>
>
> R2#sh ip pim rp
> Group: 224.2.2.2, RP: 5.5.5.5, v2, v1, uptime 00:02:47, expires 00:02:10
> R2#
>
> R2#sh ip pim nei
> PIM Neighbor Table
> Mode: B - Bidir Capable, DR - Designated Router, N - Default DR Priority,
> S - State Refresh Capable
> Neighbor Interface Uptime/Expires Ver DR
> Address
> Prio/Mode
> 5.5.245.5 Serial0/0.25 02:32:45/00:01:33 v2 1 / DR
> S
> R2#
>
> SEE the ping timing out on R2
>
> R2#sh ip pim rp
> Group: 224.2.2.2, RP: 5.5.5.5, v2, v1, uptime 00:02:47, expires 00:02:10
> R2#ping 224.2.2.2 re 5
>
> Type escape sequence to abort.
> Sending 5, 100-byte ICMP Echos to 224.2.2.2, timeout is 2 seconds:
>
> Reply to request 0 from 5.5.245.4, 136 ms
> Reply to request 0 from 5.5.245.4, 208 ms
> Reply to request 0 from 5.5.245.4, 176 ms
> Reply to request 1 from 5.5.245.4, 141 ms
> Reply to request 1 from 5.5.245.4, 157 ms...
>
>
>
> If u need any more outputs please let me know.
>
> Thanks to all
>
> Regards
>
> BB
>
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