Packet to ff02::1

[Robert Elz]

    Date:        Wed, 27 Mar 2002 07:44:07 +0100
    From:        Pim van Pelt <pim@ipng.nl>
    Message-ID:  <20020327064407.GC6163@bfib.colo.bit.nl>

  | Now what happens with IPv6 when your box wants to talk to another ?
  | 1. IPv6 neighbor solicitation is sent to IPv6 multicast address ff02::1
  | 
  |    fe80::203:47ff:fe73:1f0f -> ff02::1 Neighbor Solicitation for=20
  |    		3ffe:8350:1:51:210:7bff:fe30:591
  | 2. All boxes receive (this is mandatory!),

That isn't the way I remember ND being defined, and nor is it what
implementations seem to actually do.

17:44:34.435594 3ffe:8001:2:181::2 > ff02::1:ff0f:41cf: icmp6: neighbor sol: who has 3ffe:8001:2:181:210:a4ff:fe0f:41cf
17:44:34.435756 3ffe:8001:2:181:210:a4ff:fe0f:41cf > 3ffe:8001:2:181::2: icmp6: neighbor adv: tgt is 3ffe:8001:2:181:210:a4ff:fe0f:41cf
17:44:34.435829 3ffe:8001:2:181::2 > 3ffe:8001:2:181:210:a4ff:fe0f:41cf: icmp6: echo request
17:44:34.435927 3ffe:8001:2:181:210:a4ff:fe0f:41cf > 3ffe:8001:2:181::2: icmp6: echo reply

kre

ps: ff02::1 is similar to IPv4 broadcast (255.255.255.255 or the net specific
broadcast address) but it only bothers IPv6 nodes, not everything else that
happens to be connected to the net.  Filtering it isn't a good idea, but
it also isn't likely to be a disaster.