Clarifying two comments (maybe I should have proof-read them more
carefully)..
On Mon, 3 Nov 2003, Pekka Savola wrote:
> 7) In the section 9, "Forwarding", the second rule about sending an ICMP DU
> is specified. Has it already been considered whether this applies to
> multicast destination addresses as well? In the past, we've been a bit more
> hesitant to send replies to the source of multicast packets (e.g. consider
> an almost-global multicast scope that leaks and the source would get e.g.
> thousands of "beyond the scope" packets..) ?
>
> o After the next-hop interface is chosen, the zone of the source
> address is considered. As with the destination address, the zone
> of the source address is determined by the scope of the address
> and arrival interface of the packet. If transmitting the packet
> on the chosen next-hop interface would cause the packet to leave
> the zone of the source address, i.e., cross a zone boundary of the
> scope of the source address, then the packet is discarded and an
> ICMP Destination Unreachable message [4] with Code 2 ("beyond
> scope of source address") is sent to the source of the packet.
Actually, the scenario I described above should not be a problem, as this
bullet is about the scope of the _source_ address, not the destination
address.. and as the only non-global source address is the link-local,
sending back a message should not be a problem. Could still be spelled
out explicitly though..
> 8) multicast routing in section 10 is rather weak. This is a direct
> resolution of switching from unicast site-locals to multicast
> organization-local addresses. However, with multicast addresses, it is
> appropriate to use the terms "prefixes" to refer to multicast traffic. The
this should have been "it is *NOT* appropriate"..
.. sorry..
--
Pekka Savola "You each name yourselves king, yet the
Netcore Oy kingdom bleeds."
Systems. Networks. Security. -- George R.R. Martin: A Clash of Kings
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