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