From: Luca Hall (lhall@setnine.com)
Date: Sun Mar 30 2008 - 12:04:34 ART
On the switches if you enable multicast-routing and pim in whatever mode
your using on the relevant interfaces it will work.
> Hi Vignesh,
>
> Your issue is similar to mine few months ago. It looks like that a SW does
> send initial IGMP join, and then it will eventually time out (not
> responding
> to any further IGMP queries from upstream router. If you have an actual
> host running IGMP you would not see this issue.
>
> I suggest you to try replacing SW2 with a router as a multicast receiver,
> and see if the problem gone?
>
> Here's my original post, without having a firmed answer.
> http://www.groupstudy.com/archives/ccielab/200801/msg01818.html
>
>
> Cheers,
>
> Huan
> -----Original Message-----
> From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
> vignesh sethuraman
> Sent: Sunday, 30 March 2008 3:06 PM
> To: ccielab@groupstudy.com
> Subject: unable to Ping Mutlicast address 224.5.5.5
>
> Hello Experts,
>
> I have a question in Multicast. I am not able to ping the multicast
> address 224.5.5.5 from Sw1. Sw2 joined 224.5.5. Could you please anyone
> what i am missing here.
>
> Here is the scenario
>
> sw1(gig 2/0/1) <-------->(fa0/0) R1 (s1/0.2)<------->(s 0/1.1) R2
> (fa0/0)<------>(fa 1/0/2) SW2
>
> Here are my configs
> R1#Sh run
> Building configuration...
> Current configuration : 1492 bytes
> !
> version 12.3
> service timestamps debug datetime msec
> service timestamps log datetime msec
> no service password-encryption
> !
> hostname R1
> !
> interface Loopback0
> ip address 10.10.10.10 255.255.255.0
> ip pim sparse-mode
> !
> interface FastEthernet0/0
> ip address 10.1.1.1 255.255.255.0
> ip pim sparse-mode
> duplex auto
> speed auto
> !
> nterface Serial1/0
> no ip address
> encapsulation frame-relay
> no frame-relay inverse-arp
> !
> interface Serial1/0.2 point-to-point
> ip address 131.1.12.1 255.255.255.0
> ip pim sparse-mode
>
> !
> ip pim rp-address 10.10.10.10
>
> R1#sh ip pim neighbor
> PIM Neighbor Table
> Neighbor Interface Uptime/Expires Ver DR
> Address
> Prio/Mode
> 131.1.12.2 Serial1/0.2 12:03:09/00:01:35 v2 1 / S
>
>
> R1#sh ip pim interface
> Address Interface Ver/ Nbr Query DR DR
> Mode Count Intvl
> Prior
> 131.1.12.1 Serial1/0.2 v2/S 1 30 1
> 0.0.0.0
> 10.1.1.1 FastEthernet0/0 v2/S 0 30 1
> 10.1.1.1
> 10.10.10.10 Loopback0 v2/S 0 30 1
> 10.10.10.10
>
> R1#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
> Y - Joined MDT-data group, y - Sending to MDT-data group
> Outgoing interface flags: H - Hardware switched
> Timers: Uptime/Expires
> Interface state: Interface, Next-Hop or VCD, State/Mode
> (*, 224.5.5.5), 00:00:08/stopped, RP 10.10.10.10, flags: SP
> Incoming interface: Null, RPF nbr 0.0.0.0
> Outgoing interface list: Null
> (10.1.1.2, 224.5.5.5), 00:00:08/00:02:51, flags: PT
> Incoming interface: FastEthernet0/0, RPF nbr 0.0.0.0
> Outgoing interface list: Null
> (*, 224.0.1.40), 12:04:48/00:02:31, RP 10.10.10.10, flags: SJCL
> Incoming interface: Null, RPF nbr 0.0.0.0
> Outgoing interface list:
> Serial1/0.2, Forward/Sparse, 12:04:49/00:03:28
>
> R1#sh ip pim rp
> Group: 224.5.5.5, RP: 10.10.10.10, next RP-reachable in 00:00:09
> Group: 224.0.1.40, RP: 10.10.10.10, next RP-reachable in 00:00:14
> -----------------------------------
> R2;
>
> R2#Sh run
>
> interface Loopback0
> ip address 20.20.20.20 255.255.255.0
> !
> interface FastEthernet0/0
> ip address 20.2.2.2 255.255.255.0
> ip pim sparse-mode
> duplex auto
> speed auto
> !
> interface Serial0/1
> no ip address
> encapsulation frame-relay
> no dce-terminal-timing-enable
> !
> interface Serial0/1.1 point-to-point
> ip address 131.1.12.2 255.255.255.0
> ip pim sparse-mode
> frame-relay interface-dlci 201
> !
> ip pim rp-address 10.10.10.10
> !
>
>
> R2#sh ip pim neighbor
> 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
> 131.1.12.1 Serial0/1.1 12:10:19/00:01:22 v2 1 / S
>
> R2#sh ip pim interface
> Address Interface Ver/ Nbr Query DR
> DR
> Mode Count Intvl
> Prior
> 20.2.2.2 FastEthernet0/0 v2/S 0 30 2000
> 20.2.2.2
> 131.1.12.2 Serial0/1.1 v2/S 1 30 1
> 0.0.0.0
>
> R2#sh ip pim rp
> Group: 224.0.1.40, RP: 10.10.10.10, uptime 00:02:56, expires never
>
> R2#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
> (*, 224.0.1.40), 00:08:21/stopped, RP 10.10.10.10, flags: SJPCL
> Incoming interface: Serial0/1.1, RPF nbr 131.1.12.1
> Outgoing interface list: Null
> ----------------------------------------------
> SW1#sh run int giga 2/0/1
> Building configuration...
> Current configuration : 108 bytes
> !
> interface GigabitEthernet2/0/1
> no switchport
> ip address 10.1.1.2 255.255.255.0
> no ip mroute-cache
> end
>
> ------------------------------------------------
> SW2#sh run int fa 1/0/2
> Building configuration...
> Current configuration : 135 bytes
> !
> interface FastEthernet1/0/2
> no switchport
> ip address 20.2.2.3 255.255.255.0
> ip igmp join-group 224.5.5.5
> no ip mroute-cache
> end
>
> SW1#p 224.5.5.5
> Type escape sequence to abort.
> Sending 1, 100-byte ICMP Echos to 224.5.5.5, timeout is 2 seconds:
> ....
> SW1#
>
> Thanks,
> Vignesh
>
>
>
>
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