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IP SPARSE MODE Scenario

Hi everyone,

 

Scenario#1

Source-10.10.10.10---10.10.10.1 f0/0 R1(rp)--------->rest of multicast network--Listener 235.1.1.1
Assumptions:

R1 has IP sparse mode configured on f0/0, assume rest of multicast config is correct, R1 has ( *,235.1.1.1) in mtable.
Source sends a multicast stream with SRC IP 1.1.1.1, 235.1.1.1 ( Source is sourcing it from an IP of loopback)
Assume R1 and rest of Multicast network know 1.1.1.1 and rpf checks passes.

With these assumptions in mind, focusing only on R1 ( rp):

1) What will R1 do upon receiving ( 1.1.1.1, 235.1.1.1), will it drop it because source IP is not in the same subnet ( i.e 10.10.10.10)?
GNS3 shows very unpredictable behavior sometimes I see R1 passes the traffic, some time it does not so I do not what to believe, unfortunately I do have access to real routers at this time.

 

 

Thanks and have a nice day!!

 

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Contributor

Re: IP SPARSE MODE Scenario

So Iabbed it up( got access to real gear), just in case if someone in future wants to know:
1) What will R1 do upon receiving ( 1.1.1.1, 235.1.1.1), will it drop it because source IP is not in the same subnet ( i.e 10.10.10.10)?
It processes it and built ( S.G) tree towards Source.
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