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Forwarding multicast packets.

Hi,

I hope someone can answer this simple question.

I have a cisco 2611XM with two fast enet interfaces connected to a westell 6100 adsl modem set in bridge mode. My adsl service is SBC PPPoE sticky statics /28 block. My outside interface is dialer0 connected to FA0/1, my inside interface is FA0/0. My westell is at 192.168.1.254, my FA0/1 at 192.168.1.1, my FA0/0 at 192.168.0.1.

What I want is to forward status multicast packets generated by the westell 6100 to the local LAN where a monitoring program is processing the information. The westell multicast group is 224.73.193.62 Mcast Packets are generated 1 every 2 seconds and look like this

[START] No. Time Source Destination Protocol Info 9 2.000057 192.168.1.254 224.73.193.62 UDP Source port: Frame 9 (162 bytes on wire, 162 bytes captured) Arrival Time: May 20, 2005 23:05:43.175368000 Time delta from previous packet: 0.133024000 seconds Time since reference or first frame: 2.000057000 seconds Frame Number: 9 Packet Length: 162 bytes Capture Length: 162 bytes Ethernet II, Src: 00:60:0f:7e:37:6c, Dst: 01:00:5e:49:c1:3e Destination: 01:00:5e:49:c1:3e (01:00:5e:49:c1:3e) Source: 00:60:0f:7e:37:6c (Westell_7e:37:6c) Type: IP (0x0800) Internet Protocol, Src Addr: 192.168.1.254 (192.168.1.254), Dst Addr: 224.73.193.62 ( Version: 4 Header length: 20 bytes Differentiated Services Field: 0x00 (DSCP 0x00: Default; ECN: 0x00) 0000 00.. = Differentiated Services Codepoint: Default (0x00) .... ..0. = ECN-Capable Transport (ECT): 0 .... ...0 = ECN-CE: 0 Total Length: 148 Identification: 0x0123 (291) Flags: 0x00 0... = Reserved bit: Not set .0.. = Don't fragment: Not set ..0. = More fragments: Not set Fragment offset: 0 Time to live: 1 Protocol: UDP (0x11) Header checksum: 0x5408 (correct) Source: 192.168.1.254 (192.168.1.254) Destination: 224.73.193.62 (224.73.193.62) User Datagram Protocol, Src Port: 1875 (1875), Dst Port: 1875 (1875) Source port: 1875 (1875) Destination port: 1875 (1875) Length: 128 Checksum: 0x0000 (none) Data (120 bytes) 0000 01 00 5e 49 c1 3e 00 60 0f 7e 37 6c 08 00 45 00 ..^I.>.`.~7l..E. 0010 00 94 01 23 00 00 01 11 54 08 c0 a8 01 fe e0 49 ...#....T......I 0020 c1 3e 07 53 07 53 00 80 00 00 00 32 01 03 95 45 .>.S.S.....2...E 0030 01 00 a0 00 65 00 22 01 60 02 73 00 a6 00 e0 01 ....e.".`.s..... 0040 80 17 00 00 00 00 49 02 00 00 00 00 00 00 00 00 ......I......... 0050 00 00 00 00 00 00 ce 1c 08 00 1c 04 90 00 35 04 ..............5. 0060 00 00 ff ff ff ff 00 00 00 00 00 00 00 00 00 00 ................ 0070 00 00 01 00 ff ff ff ff ff ff ff ff ff ff ff ff ................ 0080 ff ff ff ff ff ff ff ff ff ff ff ff 12 8c 06 00 ................ 0090 f5 3c 03 00 00 00 00 00 00 00 00 00 00 01 00 00 .
Reply to
Robert Dohrenburg
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Hi,

Is your pc joining the multicast group? does "show ip mroute" show the multicast group? Do a debug for igmp traffic and make sure your pc joins the group.

Erik

Reply to
Erik Tamminga

Erik,

First, thanks for reading my post.

With basic multicast routing enabled. ip multicast-routing ip pim dense-mode in all interfaces.

before running the monitor program: cisco2611xm#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, A - Assert winner Timers: Uptime/Expires Interface state: Interface, Next-Hop or VCD, State/Mode

(*, 224.0.1.1), 00:00:16/00:02:51, RP 0.0.0.0, flags: DC Incoming interface: Null, RPF nbr 0.0.0.0 Outgoing interface list: FastEthernet0/1, Forward/Dense, 00:00:10/00:00:00 FastEthernet0/0, Forward/Dense, 00:00:16/00:00:00

(*, 224.0.1.40), 00:00:17/00:02:52, RP 0.0.0.0, flags: DCL Incoming interface: Null, RPF nbr 0.0.0.0 Outgoing interface list: FastEthernet0/1, Forward/Dense, 00:00:10/00:00:00 FastEthernet0/0, Forward/Dense, 00:00:17/00:00:00

(*, 224.0.1.60), 00:00:14/00:02:57, RP 0.0.0.0, flags: DC Incoming interface: Null, RPF nbr 0.0.0.0 Outgoing interface list: FastEthernet0/1, Forward/Dense, 00:00:10/00:00:00 FastEthernet0/0, Forward/Dense, 00:00:14/00:00:00

(*, 239.255.255.250), 00:00:16/00:02:51, RP 0.0.0.0, flags: DC Incoming interface: Null, RPF nbr 0.0.0.0 Outgoing interface list: FastEthernet0/1, Forward/Dense, 00:00:10/00:00:00 FastEthernet0/0, Forward/Dense, 00:00:16/00:00:00

after the monitor program starts: cisco2611xm#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, A - Assert winner Timers: Uptime/Expires Interface state: Interface, Next-Hop or VCD, State/Mode

(*, 224.0.1.1), 00:03:38/00:02:51, RP 0.0.0.0, flags: DC Incoming interface: Null, RPF nbr 0.0.0.0 Outgoing interface list: FastEthernet0/1, Forward/Dense, 00:03:32/00:00:00 FastEthernet0/0, Forward/Dense, 00:03:38/00:00:00

(*, 224.0.1.40), 00:03:40/00:02:55, RP 0.0.0.0, flags: DCL Incoming interface: Null, RPF nbr 0.0.0.0 Outgoing interface list: FastEthernet0/1, Forward/Dense, 00:03:32/00:00:00 FastEthernet0/0, Forward/Dense, 00:03:40/00:00:00

(*, 224.0.1.60), 00:03:36/00:02:56, RP 0.0.0.0, flags: DC Incoming interface: Null, RPF nbr 0.0.0.0 Outgoing interface list: FastEthernet0/1, Forward/Dense, 00:03:32/00:00:00 FastEthernet0/0, Forward/Dense, 00:03:36/00:00:00

(*, 224.73.193.62), 00:02:53/00:02:53, RP 0.0.0.0, flags: DC Incoming interface: Null, RPF nbr 0.0.0.0 Outgoing interface list: FastEthernet0/0, Forward/Dense, 00:00:06/00:00:00

(*, 239.255.255.250), 00:03:38/00:02:55, RP 0.0.0.0, flags: DC Incoming interface: Null, RPF nbr 0.0.0.0 Outgoing interface list: FastEthernet0/1, Forward/Dense, 00:03:32/00:00:00 FastEthernet0/0, Forward/Dense, 00:03:38/00:00:00

Debuging... cisco2611xm#debug ip rout IP routing debugging is on cisco2611xm#debug ip mpacket 224.73.193.62 IP multicast packets debugging is on for group 224.73.193.62 cisco2611xm#debug ip igmp IGMP debugging is on cisco2611xm#sh log Syslog logging: enabled (10 messages dropped, 1 messages rate-limited, 0 flushes, 0 overruns, xml disabled) Console logging: disabled Monitor logging: disabled Buffer logging: level debugging, 79745 messages logged, xml disabled Logging Exception size (4096 bytes) Count and timestamp logging messages: disabled Trap logging: level debugging, 79650 message lines logged Logging to 192.168.0.5, 79650 message lines logged, xml disabled

Log Buffer (52000 bytes):

RT: NET-RED 0.0.0.0/0 RT: NET-RED queued, Queue size 1 IGMP(0): Received v2 Report on FastEthernet0/0 from 192.168.0.7 for

224.73.193.62 IGMP(0): Received Group record for group 224.73.193.62, mode 2 from 192.168.0.7 for 0 sources IGMP(0): WAVL Insert group: 224.73.193.62 interface: FastEthernet0/0Successful IGMP(0): Switching to EXCLUDE mode for 224.73.193.62 on FastEthernet0/0 IGMP(0): Updating EXCLUDE group timer for 224.73.193.62 IGMP(0): MRT Add/Update FastEthernet0/0 for (*,224.73.193.62) by 0

It is connecting to the group but I don't think it is joining the group.

Erik Tamm> Hi,

Reply to
Robert Dohrenburg

Opps... here is the debug info:

cisco2611xm#sh ip igmp grou IGMP Connected Group Membership Group Address Interface Uptime Expires Last Reporter

224.0.1.1 FastEthernet0/0 01:04:18 00:02:23 192.168.0.5 224.0.1.40 FastEthernet0/0 01:04:19 00:02:20 192.168.0.1 224.0.1.60 FastEthernet0/0 01:04:15 00:02:20 192.168.0.128 239.255.255.250 FastEthernet0/0 01:04:18 00:02:15 192.168.0.20

cisco2611xm#sh log Syslog logging: enabled (10 messages dropped, 1 messages rate-limited, 0 flushes, 0 overruns, xml disabled) Console logging: disabled Monitor logging: disabled Buffer logging: level debugging, 81516 messages logged, xml disabled Logging Exception size (4096 bytes) Count and timestamp logging messages: disabled Trap logging: level debugging, 81307 message lines logged Logging to 192.168.0.5, 81307 message lines logged, xml disabled

Log Buffer (52000 bytes):

IGMP(0): Received v2 Report on FastEthernet0/0 from 192.168.0.7 for

224.73.193.62 IGMP(0): Received Group record for group 224.73.193.62, mode 2 from 192.168.0.7 for 0 sources IGMP(0): WAVL Insert group: 224.73.193.62 interface: FastEthernet0/0Successful IGMP(0): Switching to EXCLUDE mode for 224.73.193.62 on FastEthernet0/0 IGMP(0): Updating EXCLUDE group timer for 224.73.193.62 IGMP(0): MRT Add/Update FastEthernet0/0 for (*,224.73.193.62) by 0 MRT(0): Update (*,224.73.193.62), RPF /0.0.0.0 MRT(0): Set the C-flag for (*, 224.73.193.62) MRT(0): WAVL Insert interface: FastEthernet0/0 in (* ,224.73.193.62) Successful MRT(0): Add FastEthernet0/0/224.73.193.62 to the olist of (*, 224.73.193.62), Forward state - MAC built IGMP(0): Send v2 general Query on FastEthernet0/0 IGMP(0): Set report delay time to 4.3 seconds for 224.0.1.40 on FastEthernet0/0 IGMP(0): Received v2 Report on FastEthernet0/0 from 192.168.0.20 for 239.255.255.250 IGMP(0): Received Group record for group 239.255.255.250, mode 2 from 192.168.0.20 for 0 sources IGMP(0): Updating EXCLUDE group timer for 239.255.255.250 IGMP(0): MRT Add/Update FastEthernet0/0 for (*,239.255.255.250) by 0 MRT(0): Update (*,239.255.255.250), RPF /0.0.0.0 MRT(0): Update FastEthernet0/0/239.255.255.250 in the olist of (*, 239.255.255.250), Forward state - MAC built IGMP(0): Send v2 general Query on FastEthernet0/1 IGMP(0): Received v2 Report on FastEthernet0/0 from 192.168.0.7 for 224.73.193.62 IGMP(0): Received Group record for group 224.73.193.62, mode 2 from 192.168.0.7 for 0 sources IGMP(0): Updating EXCLUDE group timer for 224.73.193.62 IGMP(0): MRT Add/Update FastEthernet0/0 for (*,224.73.193.62) by 0 MRT(0): Update (*,224.73.193.62), RPF /0.0.0.0 MRT(0): Update FastEthernet0/0/224.73.193.62 in the olist of (*, 224.73.193.62), Forward state - MAC built IGMP(0): Received v1 Report on FastEthernet0/0 from 192.168.0.128 for 224.0.1.60 IGMP(0): Received Group record for group 224.0.1.60, mode 2 from 192.168.0.128 for 0 sources IGMP(0): Setting v1 old host timer for 224.0.1.60 on FastEthernet0/0 IGMP(0): Updating EXCLUDE group timer for 224.0.1.60 IGMP(0): MRT Add/Update FastEthernet0/0 for (*,224.0.1.60) by 0 MRT(0): Update (*,224.0.1.60), RPF /0.0.0.0 MRT(0): Update FastEthernet0/0/224.0.1.60 in the olist of (*, 224.0.1.60), Forward state - MAC built IGMP(0): Send v2 Report for 224.0.1.40 on FastEthernet0/0 IGMP(0): Received v2 Report on FastEthernet0/0 from 192.168.0.1 for 224.0.1.40 IGMP(0): Received Group record for group 224.0.1.40, mode 2 from 192.168.0.1 for 0 sources IGMP(0): Updating EXCLUDE group timer for 224.0.1.40 IGMP(0): MRT Add/Update FastEthernet0/0 for (*,224.0.1.40) by 0 MRT(0): Update (*,224.0.1.40), RPF /0.0.0.0 MRT(0): Update FastEthernet0/0/224.0.1.40 in the olist of (*, 224.0.1.40), Forward state - MAC built IGMP(0): Received v2 Report on FastEthernet0/0 from 192.168.0.6 for 224.0.0.251 IGMP(0): Report has illegal group address 224.0.0.251 IGMP(0): Received v2 Report on FastEthernet0/0 from 192.168.0.5 for 224.0.1.1 IGMP(0): Received Group record for group 224.0.1.1, mode 2 from 192.168.0.5 for 0 sources IGMP(0): Updating EXCLUDE group timer for 224.0.1.1 IGMP(0): MRT Add/Update FastEthernet0/0 for (*,224.0.1.1) by 0 MRT(0): Update (*,224.0.1.1), RPF /0.0.0.0 MRT(0): Update FastEthernet0/0/224.0.1.1 in the olist of (*, 224.0.1.1), Forward state - MAC built IGMP(0): Received Leave from 192.168.0.7 (FastEthernet0/0) for 224.73.193.62 IGMP(0): Received Group record for group 224.73.193.62, mode 3 from 192.168.0.7 for 0 sources IGMP(0): Lower expiration timer to 2000 msec for 224.73.193.62 on FastEthernet0/0 IGMP(0): Send v2 Query on FastEthernet0/0 for group 224.73.193.62 IGMP(0): Send v2 Query on FastEthernet0/0 for group 224.73.193.62 IGMP(0): Switching to INCLUDE mode for 224.73.193.62 on FastEthernet0/0 IGMP(0): MRT delete FastEthernet0/0 for (*,224.73.193.62) by 0 MRT(0): Delete FastEthernet0/0/224.73.193.62 from the olist of (*, 224.73.193.62) MRT(0): set m> Hi,
Reply to
Robert Dohrenburg

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