From: Peter Cresswell (p-cresswell@iname.com)
Date: Thu Sep 14 2006 - 05:31:18 ART
Hi Sabrina,
Thank you so much for you very detailed & comprehensive email. I understand
now, and have it working on my equipment.
I was experiencing the RPF failure and didn't understand why I needed the
mroute, but now I see.
Thanks again, everything has clicked into place in my mind :-)
Peter
_____
From: sabrina pittarel [mailto:sabri_esame@yahoo.com]
Sent: 13 September 2006 21:19
To: Peter Cresswell; ccielab@groupstudy.com
Subject: Re: Hub & Spoke Multicast problem
OK,
one step at the time. Let me show you what I see an my routers
**** On my Spoke2 router I have:
CFG:
-----
ip multicast-routing
interface Loopback0
ip address 150.1.1.1 255.255.255.0
ip pim sparse-mode
ip igmp join-group 224.1.1.1
interface Serial1/0
description "to FR_SW s0/1"
ip address 149.1.123.1 255.255.255.0
ip pim sparse-mode
encapsulation frame-relay
serial restart-delay 0
no fair-queue
cdp enable
frame-relay map ip 149.1.123.2 103
frame-relay map ip 149.1.123.3 103 broadcast
ip pim rp-address 150.1.2.2
ip mroute 0.0.0.0 0.0.0.0 149.1.123.3
Note that, in my topology, I had to override the unicast routing table for
multicast reachability.
Mcast Routing
---------------
Rack1R1#sh ip igmp gr
IGMP Connected Group Membership
Group Address Interface Uptime Expires Last Reporter
Group Accounted
224.1.1.1 Loopback0 00:06:39 00:02:04 150.1.1.1
224.0.1.40 Serial1/0 00:02:36 00:02:26 149.1.123.3
224.0.1.40 Loopback0 00:06:39 00:02:05 150.1.1.1
Rack1R1#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
149.1.123.3 (Hub) Serial1/0 00:02:41/00:01:33 v2 1 / DR S
Rack1R1#
Rack1R1#sh ip pim rp mapping
PIM Group-to-RP Mappings
Group(s): 224.0.0.0/4, Static
RP: 150.1.2.2 (?)
Rack1R1#
Rack1R1#sh ip mroute static
Mroute: 0.0.0.0/0, RPF neighbor: 149.1.123.3 <<< hub router
Protocol: none, distance: 0, route-map: none
Rack1R1#
Before I start traffic:
Rack1R1#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
(*, 224.1.1.1), 00:00:24/00:02:37, RP 150.1.2.2, flags: SJCL
Incoming interface: Serial1/0, RPF nbr 149.1.123.3, Mroute
Outgoing interface list:
Loopback0, Forward/Sparse, 00:00:24/00:02:37
(*, 224.0.1.40), 00:00:24/00:02:41, RP 150.1.2.2, flags: SJCL
Incoming interface: Serial1/0, RPF nbr 149.1.123.3, Mroute
Outgoing interface list:
Loopback0, Forward/Sparse, 00:00:24/00:02:37
While traffic is running:
Rack1R1#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
(*, 224.1.1.1), 00:24:14/stopped, RP 150.1.2.2, flags: SJCL
Incoming interface: Serial1/0, RPF nbr 149.1.123.3, Mroute
Outgoing interface list:
Loopback0, Forward/Sparse, 00:24:14/00:02:26
(150.1.2.2, 224.1.1.1), 00:03:43/00:01:23, flags: LJT
Incoming interface: Serial1/0, RPF nbr 149.1.123.3, Mroute
Outgoing interface list:
Loopback0, Forward/Sparse, 00:03:43/00:02:26
(*, 224.0.1.40), 00:24:14/00:02:54, RP 150.1.2.2, flags: SJCL
Incoming interface: Serial1/0, RPF nbr 149.1.123.3, Mroute
Outgoing interface list:
Loopback0, Forward/Sparse, 00:24:14/00:02:32
Rack1R1#
**** On my HUB:
CFG
---- ip multicast-routinginterface Serial1/0 description "to FR_SW s0/0" bandwidth 1544 ip address 149.1.123.3 255.255.255.0 ip pim nbma-mode ip pim sparse-mode encapsulation frame-relay serial restart-delay 0 no fair-queue cdp enable frame-relay map ip 149.1.123.1 301 broadcast frame-relay map ip 149.1.123.2 302 broadcast end
ip pim rp-address 150.1.2.2
Mcast routing --------------
Rack1R3#sh ip igmp gr <<<<<< Not relevant IGMP Connected Group Membership Group Address Interface Uptime Expires Last Reporter Group Accounted 224.0.1.40 Serial1/0 00:20:06 00:02:19 149.1.123.3
Rack1R3# Rack1R3#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 149.1.123.2(Spoke1) Serial1/0 00:19:56/00:01:30 v2 1 / S 149.1.123.1(Spoke2) Serial1/0 00:19:58/00:01:31 v2 1 / S
Before I start traffic:
Rack1R3#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
(*, 224.1.1.1), 00:00:48/00:02:45, RP 150.1.2.2, flags: S Incoming interface: Serial1/0, RPF nbr 149.1.123.2 Outgoing interface list: Serial1/0, 149.1.123.1, Forward/Sparse, 00:00:48/00:02:45
(*, 224.0.1.40), 00:01:30/00:02:53, RP 150.1.2.2, flags: SJCL Incoming interface: Serial1/0, RPF nbr 149.1.123.2 Outgoing interface list: Serial1/0, 149.1.123.1, Forward/Sparse, 00:00:47/00:02:46 Serial1/0, 149.1.123.3, Forward/Sparse, 00:01:30/00:02:53
Rack1R3#
After I start traffic:
Rack1R3#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
(*, 224.1.1.1), 00:20:55/00:03:07, RP 150.1.2.2, flags: SF Incoming interface: Serial1/0, RPF nbr 149.1.123.2 Outgoing interface list: Serial1/0, 149.1.123.1, Forward/Sparse, 00:20:55/00:03:07
(150.1.2.2, 224.1.1.1), 00:02:33/00:02:59, flags: T Incoming interface: Serial1/0, RPF nbr 149.1.123.2 Outgoing interface list: Serial1/0, 149.1.123.1, Forward/Sparse, 00:02:33/00:03:07
(*, 224.0.1.40), 00:21:37/00:03:14, RP 150.1.2.2, flags: SJCL Incoming interface: Serial1/0, RPF nbr 149.1.123.2 Outgoing interface list: Serial1/0, 149.1.123.1, Forward/Sparse, 00:20:54/00:03:14 Serial1/0, 149.1.123.3, Forward/Sparse, 00:21:37/00:02:08
Rack1R3#
**** On my Spoke1 (the RP)
CFG ----
ip multicast-routing
interface Loopback0 ip address 150.1.2.2 255.255.255.0 ip pim sparse-dense-mode
interface Serial1/0 description "to FR_SW s0/2" bandwidth 64 ip address 149.1.123.2 255.255.255.0 ip pim sparse-mode encapsulation frame-relay serial restart-delay 0 no fair-queue frame-relay map ip 149.1.123.1 203 frame-relay map ip 149.1.123.3 203 broadcast no frame-relay inverse-arp
ip pim rp-address 150.1.2.2
Mcast Routing ---------------
Rack1R2# Rack1R2#sh ip igmp group IGMP Connected Group Membership Group Address Interface Uptime Expires Last Reporter Group Accounted 224.0.1.40 Serial1/0 00:32:01 00:02:06 149.1.123.3
224.0.1.40 Loopback0 00:32:13 00:01:55 150.1.2.2
Rack1R2# Rack1R2#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 149.1.123.3(Hub) Serial1/0 00:28:25/00:01:24 v2 1 / DR S Rack1R2# Before I ping: --------------
Rack1R2#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
(*, 224.1.1.1), 00:01:08/00:03:26, RP 150.1.2.2, flags: S Incoming interface: Null, RPF nbr 0.0.0.0 Outgoing interface list: Serial1/0, Forward/Sparse, 00:01:08/00:03:26
(*, 224.0.1.40), 00:01:17/00:02:53, RP 150.1.2.2, flags: SJCL Incoming interface: Null, RPF nbr 0.0.0.0 Outgoing interface list: Serial1/0, Forward/Sparse, 00:00:45/00:02:48 Loopback0, Forward/Sparse-Dense, 00:01:17/00:02:53
While I'm pinging ------------------ Rack1R2#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
(*, 224.1.1.1), 00:10:37/00:02:42, RP 150.1.2.2, flags: S Incoming interface: Null, RPF nbr 0.0.0.0 Outgoing interface list: Serial1/0, Forward/Sparse, 00:10:37/00:02:42
(149.1.123.2, 224.1.1.1), 00:01:57/00:02:55, flags: P Incoming interface: Serial1/0, RPF nbr 0.0.0.0 Outgoing interface list: Null
(150.1.2.2, 224.1.1.1), 00:01:57/00:03:25, flags: T Incoming interface: Loopback0, RPF nbr 0.0.0.0 Outgoing interface list: Serial1/0, Forward/Sparse, 00:01:57/00:02:42
(*, 224.0.1.40), 00:10:47/00:02:41, RP 150.1.2.2, flags: SJCL Incoming interface: Null, RPF nbr 0.0.0.0 Outgoing interface list: Serial1/0, Forward/Sparse, 00:10:15/00:02:59 Loopback0, Forward/Sparse-Dense, 00:10:47/00:02:33
Rack1R2# Rack1R2#ping Protocol [ip]: Target IP address: 224.1.1.1 Repeat count [1]: 1000 Datagram size [100]: Timeout in seconds [2]: Extended commands [n]: y Interface [All]: Serial1/0 Time to live [255]: Source address: Serial1/0 Type of service [0]: Set DF bit in IP header? [no]: Validate reply data? [no]: Data pattern [0xABCD]: Loose, Strict, Record, Timestamp, Verbose[none]: Sweep range of sizes [n]: Type escape sequence to abort. Sending 1000, 100-byte ICMP Echos to 224.1.1.1, timeout is 2 seconds: Packet sent with a source address of 149.1.123.2 ............... Rack1R2# Rack1R2#ping 224.1.1.1
Rack1R2#ping Protocol [ip]: Target IP address: 224.1.1.1 Repeat count [1]: 1000 Datagram size [100]: Timeout in seconds [2]: Extended commands [n]: y Interface [All]: Serial1/0 Time to live [255]: Source address: Loopback0 Type of service [0]: Set DF bit in IP header? [no]: Validate reply data? [no]: Data pattern [0xABCD]: Loose, Strict, Record, Timestamp, Verbose[none]: Sweep range of sizes [n]: Type escape sequence to abort. Sending 1000, 100-byte ICMP Echos to 224.1.1.1, timeout is 2 seconds: Packet sent with a source address of 150.1.2.2
Reply to request 0 from 149.1.123.1, 112 ms Reply to request 1 from 149.1.123.1, 160 ms Reply to request 2 from 149.1.123.1, 112 ms Reply to request 3 from 149.1.123.1, 172 ms Reply to request 4 from 149.1.123.1, 132 ms Reply to request 5 from 149.1.123.1, 200 ms Reply to request 6 from 149.1.123.1, 160 ms Reply to request 7 from 149.1.123.1, 92 ms
Sabrina
----- Original Message ---- From: Peter Cresswell <p-cresswell@iname.com> To: sabrina pittarel <sabri_esame@yahoo.com>; ccielab@groupstudy.com Sent: Wednesday, September 13, 2006 1:16:22 AM Subject: RE: Hub & Spoke Multicast problem
Hi Sabrina,
I tried that sourcing from both my loo0 and eth0/0 (which i put into sparse-dense-mode) and still no good.
I don't understand why my OIL's are all saying null?? Do you know what would cause this? In nbma mode i would have expected to see and OIL with Ser0/0 and the IP of Spoke2.
Thanks, Peter
_____
From: sabrina pittarel [mailto:sabri_esame@yahoo.com] Sent: 13 September 2006 05:10 To: Peter Cresswell; Anis Faruqui; ccielab@groupstudy.com Subject: Re: Hub & Spoke Multicast problem
Hi, let me see if I understood right. Spoke 1 is the RP and is also the router from where you want to ping Spoke 2 is the router that is joining the group.
If yes, then I believe your problem may be the following. When you ping out of Spoke1 the source ip address of your packet is going to be the serial interface ip address... This will prevent Spoke1 from creating the proper (S,G) entry...i.e. the oif won't have the serial interface. I believe the code won't like to have Incoming interface equal to the Outgoing interface...
Try pinging using any other router address (remember to enable multicast on the interface from where you are getting the address)
Sabrina
----- Original Message ---- From: Peter Cresswell <p-cresswell@iname.com> To: Anis Faruqui <anisccie@gmail.com>; ccielab@groupstudy.com Sent: Tuesday, September 12, 2006 5:33:49 AM Subject: RE: Hub & Spoke Multicast problem
Hi Aris,
Yes I can ping the address from the hub and spoke2, just not spoke1 to spoke2.
When i so "show ip pim rp map" on Spoke1, it correctly shows itself as the RP, but a sh ip mroute shows:
Spoke1#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
(*, 233.1.1.1), 00:07:48/stopped, RP 150.1.3.3, flags: SP Incoming interface: Null, RPF nbr 0.0.0.0 Outgoing interface list: Null
(150.1.3.3, 233.1.1.1), 00:01:12/00:02:59, flags: PT Incoming interface: Loopback0, RPF nbr 0.0.0.0 Outgoing interface list: Null
(163.1.54.3, 233.1.1.1), 00:01:12/00:02:55, flags: P Incoming interface: Serial2/0, RPF nbr 0.0.0.0 Outgoing interface list: Null
(*, 224.0.1.40), 18:38:04/00:02:40, RP 150.1.3.3, flags: SJCL Incoming interface: Null, RPF nbr 0.0.0.0 Outgoing interface list: Serial2/0, 163.1.54.5, Forward/Sparse, 02:25:51/00:02:37 Loopback0, Forward/Sparse-Dense, 18:38:04/00:02:40
Spoke1#
Why does it not show Ser2/0 in the outgoing interface list for 150.1.3.3,233.1.1.1?
Thanks,
Peter
_____
From: Anis Faruqui [mailto:anisccie@gmail.com] Sent: 12 September 2006 12:35 To: Peter Cresswell Subject: Re: Hub & Spoke Multicast problem
Can you please join the spoke 1 or Hub ether or any other interface to this group and then ping and check the result.
also please run the debup mpackets and check the output ,try checking the sh ip pim rp-mappings command..
regards,
Anis Faruqui..
On 9/12/06, Peter Cresswell <p-cresswell@iname.com> wrote:
Hello everyone,
Please could you help me with a multicast problem I have. Here's the topology:
Hub / \ / \ Spoke1 Spoke2
I want to use a static RP (Spoke1 Lo0) for all groups, and join a group (233.1.1.1) on Spoke2/Lo0. I do not want to use sub-interfaces on the serial ints.
When I configure this, I cannot ping 233.1.1.1 from Spoke2.
Below are my configs:
******************************** Hub:
version 12.3 service timestamps debug datetime msec service timestamps log datetime msec no service password-encryption ! hostname Hub ! boot-start-marker boot-end-marker ! ! no aaa new-model ip subnet-zero ! ! ! ip multicast-routing ip cef !
! interface Loopback0 ip address 150.1.5.5 255.255.255.255 ip pim sparse-dense-mode ! interface Ethernet0/0 no ip address shutdown half-duplex ! interface Serial0/0 description FR hub ip address 163.1.54.5 255.255.255.0 ip pim nbma-mode ip pim sparse-mode encapsulation frame-relay frame-relay map ip 163.1.54.3 503 broadcast frame-relay map ip 163.1.54.4 504 broadcast no frame-relay inverse-arp frame-relay lmi-type cisco ! interface Ethernet0/1 no ip address shutdown half-duplex ! interface Serial0/1 no ip address shutdown ! router ospf 1 router-id 150.1.5.5 log-adjacency-changes network 150.1.5.5 0.0.0.0 area 0 network 163.1.54.5 0.0.0.0 area 0 neighbor 163.1.54.4 neighbor 163.1.54.3 ! ip http server ip classless ! ip pim rp-address 150.1.3.3
! line con 0 line aux 0 line vty 0 4 login ! ! end
********************************* Spoke1: version 12.4 service timestamps debug datetime msec service timestamps log datetime msec no service password-encryption ! hostname Spoke1 ! boot-start-marker boot-end-marker ! ! no aaa new-model ! resource policy ! ip subnet-zero ! ! ip cef ! ! ip multicast-routing !
interface Loopback0 ip address 150.1.3.3 255.255.255.255 ip pim sparse-dense-mode ! ! interface Serial2/0 description Spoke FR int ip address 163.1.54.3 255.255.255.0 ip pim nbma-mode ip pim sparse-mode encapsulation frame-relay serial restart-delay 0 frame-relay map ip 163.1.54.4 305 frame-relay map ip 163.1.54.5 305 broadcast no frame-relay inverse-arp frame-relay lmi-type cisco ! ! router ospf 1 router-id 150.1.3.3 log-adjacency-changes network 150.1.3.3 0.0.0.0 area 0 network 163.1.54.3 0.0.0.0 area 0 ! ip http server ip classless ! ! ip pim rp-address 150.1.3.3 ! access-list 3 permit 232.0.0.0 7.255.255.255 ! ! ! control-plane ! line con 0 line aux 0 line vty 0 4 login ! ! end
********************************* Spoke2:
version 12.3 service timestamps debug datetime msec service timestamps log datetime msec no service password-encryption ! hostname Spoke2 ! boot-start-marker boot-end-marker ! ! no aaa new-model ip subnet-zero ! ! ! ip multicast-routing ip cef ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! interface Loopback0 ip address 150.1.4.4 255.255.255.255 ip pim sparse-dense-mode ip igmp join-group 233.1.1.1 ! interface Ethernet0/0 no ip address shutdown half-duplex ! interface Serial0/0 description Spoke2 FR int ip address 163.1.54.4 255.255.255.0 ip pim nbma-mode ip pim sparse-mode encapsulation frame-relay frame-relay map ip 163.1.54.3 405 frame-relay map ip 163.1.54.5 <http://163.1.54.5> 405 broadcast no frame-relay inverse-arp frame-relay lmi-type cisco ! interface Ethernet0/1 no ip address shutdown half-duplex ! interface Serial0/1 no ip address shutdown ! router ospf 1 router-id 150.1.4.4 log-adjacency-changes network 150.1.4.4 0.0.0.0 area 0 network 163.1.54.4 0.0.0.0 area 0 ! ip http server ip classless ! ip pim rp-address 150.1.3.3 ! access-list 4 permit 224.0.0.0 7.255.255.255 ! ! ! ! ! ! line con 0 line aux 0 line vty 0 4 login ! ! End ***********************************
Any ideas? I don't need a tunnel between spokes if I'm using nbma mode do i?
Many thanks,
Peter
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