Re: [Sheflug] igmp packets...... it's getting worse....

[Will Newton <nospam [at] misconception.org.uk>]

On Thu, 16 Nov 2000, Stephen J. Turnbull wrote:

> Why you are getting those packets, you'd have to ask NTL.  But IGMP,
> like ICMP, is a control protocol.  It may be necessary "just in case"
> you want to join a multicast group (eg, it may simply be identifying
> the multicast router).  That's just a guess, and not even particularly
> well-informed.

>From my understanding, which admittedly is entirely theoretical, a mcahine
would have to join the multicast broadcast group 224.0.0.1 before any
multicast packets were forwarded to that machine. So I would guess NTL
either doesn't know they are doing this or have some particular use for
this that I can't figure out.
 
> Go to your nearest IETF mirror and look up multicast and IGMP in the
> RFCs if NTL won't tell you what's going on.

I wish him luck finding someone in tech support who has heard the letters
IGM and P all together. Most networking professionals know bugger all
about multicast.
 

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