[Xorp-users] XORP IGMPv3 is not accepting the report with source IP 0.0.0.0

[Bruce M Simpson]

Hi,


Tushar Mehta wrote:
> according to rfc-3376:
> An IGMP report is sent with a valid IP source address for the
> destination subnet.  The 0.0.0.0 source address may be used by a
> system that has not yet acquired an IP address.  Note that the
> 0.0.0.0 source address may simultaneously be used by multiple systems
> on a LAN.  Routers MUST accept a report with a source address of
> 0.0.0.0.

That's correct, it's a workaround for multicast end-stations which have 
not yet obtained IP addresses. It went away in MLDv2/v3 because 
link-local IPv6 addresses MUST be used for MLD traffic.
>
> but in my case it is showing me this error message on the terminal 
> "source must be unicast"....
> XORP is accepting my IGMPv3 report with source IP address "0.0.0.0".
> what is the problem with XORP or in my setup?

Once again: can you please tell us which operating system, version of 
XORP, etc you are using?

I don't see anything obviously wrong with your configuration file, 
although your robustness variable is set to 5, which is quite high: is 
this intentional, i.e. is it a very lossy network medium?

Please don't send RFCs as attachments to the list.

thanks
BMS