[Xorp-hackers] [Xorp-users] How to decide Unsolicited Report Interval in IGMPv3 XORP
Pavlin Radoslavov
pavlin at ICSI.Berkeley.EDU
Tue Jul 22 12:08:28 PDT 2008
Tushar Mehta <tushar.mehta at einfochips.com> wrote:
> Can anyone tell me how i can find the Unsolicited Report Interval that
> is used when any IGMP host use while transmitting state change record?
>
> according to the rfc-3376:
> - To cover the possibility of the State-Change Report being missed by
> one or more multicast routers, it is retransmitted [Robustness
> Variable] - 1 more times, at intervals chosen at random from the range
> (0, [Unsolicited Report Interval]).
>
> - Unsolicited Report Interval
> The Unsolicited Report Interval is the time between repetitions of a
> host's initial report of membership in a group. Default: 1 second.
>
> by default Unsolicited Report Interval should be 1 but XORP is not
> following it. it is picking up this interval randamly.
As Bruce mentioned in another email on the subject, this is
kernel-related config.
To clarify:
IGMP/MLD has two parts: router-side and host-side.
The host-side is typically implemented by the OS (in the kernel).
The router-side is typically an userland process.
XORP implements only the router-side, and for the host-side relies
on the kernel implementation.
The configuration changes in XORP apply only to the router side; the
host-side configuration changes are OS specific and you should refer
to the particular OS/kernel documentation for that.
In the future we might expose the host-side configuration in the
xorpsh, but right now this is a very low priority for us.
Hope that helps,
Pavlin
> i m attaching the configuration file that i am using for my set up.
>
>
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