* Brian E Carpenter > So, I'm not aware of any realistic case where this happens, or any > reason for it.
As Gert already pointed out: Neighbour Discovery. A few examples from an IX near me: 23:06:11.020045 In IP6 fe80::8678:acff:fe66:80db > 2001:7f8:12:1::3:9029: ICMP6, neighbor solicitation, who has 2001:7f8:12:1::3:9029, length 32 23:06:11.563763 In IP6 fe80::aa0c:dff:fe71:5768 > 2001:7f8:12:1::3:9029: ICMP6, neighbor solicitation, who has 2001:7f8:12:1::3:9029, length 32 23:06:29.958824 In IP6 fe80::92e2:baff:fe3f:7665 > 2001:7f8:12:1::3:9029: ICMP6, neighbor solicitation, who has 2001:7f8:12:1::3:9029, length 32 23:06:34.239488 In IP6 fe80::523d:e5ff:fe89:4ec4 > 2001:7f8:12:1::3:9029: ICMP6, neighbor solicitation, who has 2001:7f8:12:1::3:9029, length 32 23:06:45.177659 In IP6 fe80::2c1:64ff:fe60:380 > 2001:7f8:12:1::3:9029: ICMP6, neighbor solicitation, who has 2001:7f8:12:1::3:9029, length 32 Tore