[Xorp-users] Question regarding PIM-SM

Jigar jjajal at gmail.com
Thu Nov 20 02:49:25 PST 2008


Pavlin,
Thanks for your very quick reply.

Here I have attached the configuration file which is used on the RUT.
Please note that I have not mentioned anything about static route in the
configuration file but I have used XORP shell (xorpsh) for configuring it.

Following are the commands which I have fired on xorpsh to configure xorp:

# set protocols pimsm4 static-rps rp 12.22.33.44 group-prefix 224.0.0.0/4
# set protocols static route 12.22.33.44/32 next-hop 10.100.3.220
# set protocols static route 11.22.33.44/32 next-hop 10.100.3.221

Source address of UDP packet is 11.22.33.44.

Please refer to following details related to setup diagram which is sent
in previous mail:

IP address of TR2 : 10.100.3.220/24
IP address of TR1 : 10.100.3.221/24
IP address of eth1 on RUT : 10.100.3.107/24
IP address of eth0 on RUT : 192.168.14.212/24

Network 0: 192.168.14.0/24
Network 2: 10.100.3.0/24

Thanks,
Jigar

Pavlin Radoslavov wrote:
> Please send your XORP configuration (on the RUT).
>
> Pavlin
>
> P.S. Yes, XORP supports the SPT switch.
>
>
> Jigar <jjajal at gmail.com> wrote:
>
>> Hi all,
>>
>> I want to test the following scenario given in RFC-4601 (PIM-SM) in
>> section 3.3 ( Phase Three: Shortest Path Tree ):
>> ##############################################################
>> To obtain lower latencies or more efficient bandwidth utilization,
>> a router on the receiver's LAN, typically the DR, may *optionally* initiate
>> a transfer from the shared tree to a source specific shortest path tree (SPT).
>> To do this, it issues an (S,G) Join towards S.
>> ##############################################################
>>
>> I have tested this scenario with XORP and I found that XORP does not initiate
>> this step.
>>
>> To test this particular initiation, I have following setup:
>> Please find the setup which is attached.
>>
>> Test Setup details:
>> - XORP PIM-SM is enabled on the RUT. The RP is statically configured
>> for 224.0.6.130.
>> - The RUT is the DR for network 0.
>> - RUT has a static route to the RP through TR2.
>> - The RUT has a static route to the source through TR1.
>>
>> Steps followed:
>> 1. On networks 2, TR1 and TR2 transmit Hello messages.
>> 2. On network 0, transmit IGMP reports for 224.0.6.130.
>> 3. On network 1, the RP will transmit the data packets.
>> 4. The multicast destination address of the data is 224.0.6.130.
>> 5. TR2 will forward the data packets on to network 2.
>>
>> Expectations:
>> - As expected, RUT forwards multicast data packets from network 2 to network 0.
>> - As mentioned in statements in RFC, RUT may issue an (S,G) Join towards
>> source.
>> But I did not find any (S,G) Join on network 2.
>>
>> I want to know whether XORP supports the feature of creating Shortest Path Tree
>> or not. If XORP initiates this step then please tell me where I am going wrong.
>>
>> Regards,
>> Jigar Jajal
>> _______________________________________________
>> Xorp-users mailing list
>> Xorp-users at xorp.org
>> http://mailman.ICSI.Berkeley.EDU/mailman/listinfo/xorp-users
>

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