From: Michael Zuo (mzuo@ixiacom.com)
Date: Fri Dec 01 2006 - 18:13:31 ART
I changed the setup to sparse mode and added "ip pim nbma" on the HUB
and still it does not work (the outgoing list on the HUB for
(150.1.134.4, 239.1.1.1) is still NULL...
Rack1R1(config-if)#do 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
(*, 239.1.1.1), 01:16:15/stopped, RP 150.1.134.3, flags: SP
Incoming interface: Serial1/0, RPF nbr 150.1.134.3
Outgoing interface list: Null
(150.1.134.4, 239.1.1.1), 00:00:42/00:02:42, flags: PT
Incoming interface: Serial1/0, RPF nbr 0.0.0.0
Outgoing interface list: Null
(*, 239.2.2.2), 01:13:56/00:02:28, RP 150.1.134.3, flags: SP
Incoming interface: Serial1/0, RPF nbr 150.1.134.3
Outgoing interface list: Null
(*, 224.0.1.40), 01:32:51/00:02:20, RP 150.1.134.3, flags: SJPCL
Incoming interface: Serial1/0, RPF nbr 150.1.134.3
Outgoing interface list: Null
________________________________
From: LB [mailto:lb.ccie@gmail.com]
Sent: Friday, December 01, 2006 12:28 PM
To: Michael Zuo
Subject: Re: PIM dense mode with Frame-relay hub and spoke
Michael;
Multicast has a rule that says "the outgoing and incoming interface for
an mroute statement can't be the same". When you issue the ip pim
nbma-mode command, you are bending that rule by kind-of telling the
router to use IPs, instead of interfaces....
For Dense mode, you can do what sabrina says: Use a GRE Tunnel between
the spokes. Don't forget the ip mroute statement.
HTH
-L
On 12/1/06, Michael Zuo <mzuo@ixiacom.com> wrote:
Hi group,
I ran into a problem configuring pim dense mode in the frame-relay hub
and spoke environment. I configured "ip pim dense" on hub and spoke and
"ip igmp join 239.1.1.1" on one spoke. But when i do ping test, it
fails. Since "ip pim nbma-mode" is not meant for dense mode, is there
something I missed? Thanks
R1 (the HUB)
ip multicast-routing
interface Serial1/0
ip address 150.1.134.1 255.255.255.0
ip pim dense-mode
encapsulation frame-relay
no ip split-horizon eigrp 100
serial restart-delay 0
no dce-terminal-timing-enable
frame-relay map ip 150.1.134.3 103 broadcast
frame-relay map ip 150.1.134.4 104 broadcast
no frame-relay inverse-arp
end
R3 (Spoke)
ip multicast-routing
interface Serial1/0
ip address 150.1.134.3 255.255.255.0
ip pim dense-mode
encapsulation frame-relay
ip igmp join-group 239.1.1.1
serial restart-delay 0
no dce-terminal-timing-enable
frame-relay map ip 150.1.134.1 301 broadcast
frame-relay map ip 150.1.134.4 301 broadcast
no frame-relay inverse-arp
end
R4 (Spoke)
ip multicast-routing
interface Serial1/0
ip address 150.1.134.4 255.255.255.0
ip pim dense-mode
encapsulation frame-relay
serial restart-delay 0
no dce-terminal-timing-enable
frame-relay map ip 150.1.134.1 401 broadcast
frame-relay map ip 150.1.134.3 401 broadcast
no frame-relay inverse-arp
Rack1R4(config-if)#do ping 150.1.134.3
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 150.1.134.3, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 60/119/200
ms
Rack1R4(config-if)#do ping 239.1.1.1
Type escape sequence to abort.
Sending 1, 100-byte ICMP Echos to 239.1.1.1, timeout is 2 seconds:
.
Rack1R4(config-if)#
Rack1R1(config-if)#
*Mar 1 01:14:33.851: IP(0): s=150.1.134.4 (Serial1/0) d=239.1.1.1
id=48, ttl=25
4, prot=1, len=104(100), mroute olist null
*Mar 1 01:14: 33.859: IP(0): s=150.1.134.4 (Serial1/0) d=239.1.1.1
id=48, ttl=25
4, prot=1, len=104(100), mroute olist null
Rack1R1(config-if)#
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