Hello Take a look at this tcpdump:
16:56:54.663623 e6:5d:37:8f:d8:7b > 33:33:ff:a9:dd:f5, ethertype IPv6 (0x86dd), length 86: 2a00:7660:242a:ffff::1 > ff02::1:ffa9:ddf5: ICMP6, neighbor solicitation, who has fe80::222:7ff:fea9:ddf5, length 32 16:56:54.663804 00:22:07:a9:dd:f5 > e6:5d:37:8f:d8:7b, ethertype IPv6 (0x86dd), length 86: fe80::222:7ff:fea9:ddf5 > 2a00:7660:242a:ffff::1: ICMP6, neighbor advertisement, tgt is fe80::222:7ff:fea9:ddf5, length 32 16:56:54.668111 e6:5d:37:8f:d8:7b > 00:22:07:a9:dd:f5, ethertype IPv6 (0x86dd), length 86: fe80::222:7ff:fea9:ddf5 > 2a00:7660:242a:ffff::1: ICMP6, neighbor advertisement, tgt is fe80::222:7ff:fea9:ddf5, length 32 The first line is a mx204 with the MAC e6:5d:37:8f:d8:7b sending a NDP packet to multicast MAC 33:33:ff:a9:dd:f5. The second line is a CPE with MAC 00:22:07:a9:dd:f5 responding to the mx204. So far all is normal. The third line is the mx204 echoing back the reply from the CPE?! What could make the mx204 echo back the NDP response? Also would it not be good practice to use a link local address when querying for link local addresses? Regards, Baldur _______________________________________________ juniper-nsp mailing list juniper-nsp@puck.nether.net https://puck.nether.net/mailman/listinfo/juniper-nsp
