From: William Chen (kwchen@netvigator.com)
Date: Thu Apr 15 2004 - 10:50:28 GMT-3
Hi Yasser,
Thx for your reply.
However, how can you explain the follwing example, especially the mroute
entry:
> (141.1.123.1, 239.39.39.39), 00:00:18/00:03:18, flags: FT
> Incoming interface: Serial0/0, RPF nbr 0.0.0.0
> Outgoing interface list:
> Serial0/0, 141.1.123.3, Forward/Sparse, 00:00:18/00:03:18
>
Serial0/0 is in both the input interface and OIL.
Best Regards,
William Chen
----- Original Message -----
From: "Yasser Abdullah " <yasser@alharbitelecom.com>
To: "'William Chen'" <kwchen@netvigator.com>
Cc: <ccielab@groupstudy.com>
Sent: Thursday, April 15, 2004 8:53 PM
Subject: RE: ip pim nbma-mode
> No, that's not what NBMA is for. It's used to configure a hub router to
> send the multicast packet to ONLY the spoke that requested it. For split
> horizon issues just use a GRE tunnel.
>
> HTH,
>
> Yasser
>
> -----Original Message-----
> From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
> William Chen
> Sent: Thursday, April 15, 2004 3:23 PM
> To:
> Subject: ip pim nbma-mode
>
> Dear all,
>
> Anyone confirm me that the command "ip pim nbma-mode" command is able
> to
> solve the multicast split horizon problem (i.e if the Hub received
> multicast
> packets from one of the spoken will forward to another spoken, if this
> command is turn on).
>
> Following is an example:
>
> Spoken (R1):
> Rack1R1#sh run int s0/0.1
> Building configuration...
>
> Current configuration : 188 bytes
> !
> interface Serial0/0.1 point-to-point
> ip address 141.1.123.1 255.255.255.0
> ip pim sparse-mode
> ip ospf network non-broadcast
> ip ospf priority 0
> frame-relay interface-dlci 102
> end
>
> Spoken (R3):
> Rack1R3#sh run int s1/0.1
> Building configuration...
>
> Current configuration : 188 bytes
> !
> interface Serial1/0.1 point-to-point
> ip address 141.1.123.3 255.255.255.0
> ip pim sparse-mode
> ip ospf network non-broadcast
> ip ospf priority 0
> frame-relay interface-dlci 302
> end
>
> Hub (R2):
> Rack1R2#sh run int s0/0
> Building configuration...
>
> Current configuration : 360 bytes
> !
> interface Serial0/0
> ip address 141.1.123.2 255.255.255.0
> ip pim dr-priority 100
> ip pim nbma-mode
> ip pim sparse-mode
> encapsulation frame-relay
> ip ospf priority 100
> frame-relay map ip 141.1.123.1 201 broadcast
> frame-relay map ip 141.1.123.2 201
> frame-relay map ip 141.1.123.3 203 broadcast
> no frame-relay inverse-arp
> frame-relay lmi-type cisco
> end
>
> Verfication:
> Rack1R1#p
> Protocol [ip]:
> Target IP address: 239.39.39.39
> Repeat count [1]:
> Datagram size [100]:
> Timeout in seconds [2]:
> Extended commands [n]: y
> Interface [All]: Serial0/0.1
> Time to live [255]:
> Source address: 141.1.123.1
> 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 1, 100-byte ICMP Echos to 239.39.39.39, timeout is 2 seconds:
> Packet sent with a source address of 141.1.123.1
>
> Reply to request 0 from 141.1.123.3, 164 ms
>
> Rack1R2#sh ip mroute 239.39.39.39
> 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
>
> (*, 239.39.39.39), 03:30:17/stopped, RP 150.1.5.5, flags: SF
> Incoming interface: Ethernet0/0, RPF nbr 141.1.0.5, Mroute
> Outgoing interface list:
> Serial0/0, 141.1.123.3, Forward/Sparse, 03:30:17/00:03:18
>
> (141.1.123.1, 239.39.39.39), 00:00:18/00:03:18, flags: FT
> Incoming interface: Serial0/0, RPF nbr 0.0.0.0
> Outgoing interface list:
> Serial0/0, 141.1.123.3, Forward/Sparse, 00:00:18/00:03:18
>
> Rack1R1#sh ver | in IOS
> IOS (tm) C2600 Software (C2600-JK9O3S-M), Version 12.2(15)T9, RELEASE
> SOFTWARE (fc2)
> Rack1R2#sh ver | in IOS
> IOS (tm) C2600 Software (C2600-J1S3-M), Version 12.2(15)T5, RELEASE
> SOFTWARE (fc1)
> Rack1R3#sh ver | in IOS
> IOS (tm) C2600 Software (C2600-J1S3-M), Version 12.2(15)T5, RELEASE
> SOFTWARE (fc1)
>
> Best Regards,
> William Chen
>
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