(dax:20:44)% sudo tcpdump -i em0 -ns0 ip6 and host 2620:12::5 and '(icmp6 or (proto 6 and port 80))'
tcpdump: verbose output suppressed, use -v or -vv for full protocol decode
listening on em0, link-type EN10MB (Ethernet), capture size 65535 bytes
20:44:32.985651 IP6 2001:48c8:1:105:21c:c0ff:feb2:8dbd.60658 > 2620:12::5.80: Flags [S], seq 2849359526, win 5760, options [mss 1440,sackOK,TS val 2698301620 ecr 0,nop,wscale 7], length 0
20:44:33.077656 IP6 2620:12::5.80 > 2001:48c8:1:105:21c:c0ff:feb2:8dbd.60658: Flags [S.], seq 3242778414, ack 2849359527, win 57344, options [mss 1280,nop,wscale 0,nop,nop,TS val 1011385446 ecr 2698301620,nop,nop,sackOK], length 0
20:44:33.107871 IP6 2001:48c8:1:105:21c:c0ff:feb2:8dbd.60658 > 2620:12::5.80: Flags [.], ack 1, win 45, options [nop,nop,TS val 2698301651 ecr 1011385446], length 0
20:44:33.108028 IP6 2001:48c8:1:105:21c:c0ff:feb2:8dbd.60658 > 2620:12::5.80: Flags [P.], ack 1, win 45, options [nop,nop,TS val 2698301651 ecr 1011385446], length 114
20:44:33.209793 IP6 2620:12::5.80 > 2001:48c8:1:105:21c:c0ff:feb2:8dbd.60658: Flags [P.], ack 115, win 57230, options [nop,nop,TS val 1011385460 ecr 2698301651], length 399
20:44:33.209815 IP6 2620:12::5.80 > 2001:48c8:1:105:21c:c0ff:feb2:8dbd.60658: Flags [P.], ack 115, win 57230, options [nop,nop,TS val 1011385460 ecr 2698301651], length 27
20:44:33.210257 IP6 2620:12::5.80 > 2001:48c8:1:105:21c:c0ff:feb2:8dbd.60658: Flags [.], ack 115, win 57230, options [nop,nop,TS val 1011385460 ecr 2698301651], length 1268
20:44:33.210326 IP6 2001:48c8:1:2::2 > 2620:12::5: ICMP6, packet too big, mtu 1280, length 1240
20:44:33.241674 IP6 2001:48c8:1:105:21c:c0ff:feb2:8dbd.60658 > 2620:12::5.80: Flags [.], ack 400, win 54, options [nop,nop,TS val 2698301684 ecr 1011385460], length 0
20:44:33.241802 IP6 2001:48c8:1:105:21c:c0ff:feb2:8dbd.60658 > 2620:12::5.80: Flags [.], ack 400, win 54, options [nop,nop,TS val 2698301684 ecr 1011385460,nop,nop,sack 1 {1668:1695}], length 0
20:44:34.328775 IP6 2620:12::5.80 > 2001:48c8:1:105:21c:c0ff:feb2:8dbd.60658: Flags [.], ack 115, win 57230, options [nop,nop,TS val 1011385572 ecr 2698301684], length 1268
20:44:34.328871 IP6 2001:48c8:1:2::2 > 2620:12::5: ICMP6, packet too big, mtu 1280, length 1240
20:44:36.328977 IP6 2620:12::5.80 > 2001:48c8:1:105:21c:c0ff:feb2:8dbd.60658: Flags [.], ack 115, win 57230, options [nop,nop,TS val 1011385772 ecr 2698301684], length 1268
20:44:36.329062 IP6 2001:48c8:1:2::2 > 2620:12::5: ICMP6, packet too big, mtu 1280, length 1240
20:44:40.329862 IP6 2620:12::5.80 > 2001:48c8:1:105:21c:c0ff:feb2:8dbd.60658: Flags [.], ack 115, win 57230, options [nop,nop,TS val 1011386172 ecr 2698301684], length 1268
20:44:40.329945 IP6 2001:48c8:1:2::2 > 2620:12::5: ICMP6, packet too big, mtu 1280, length 1240
20:44:48.329484 IP6 2620:12::5.80 > 2001:48c8:1:105:21c:c0ff:feb2:8dbd.60658: Flags [.], ack 115, win 57230, options [nop,nop,TS val 1011386972 ecr 2698301684], length 1268
20:44:48.329561 IP6 2001:48c8:1:2::2 > 2620:12::5: ICMP6, packet too big, mtu 1280, length 1240
20:45:04.329549 IP6 2620:12::5.80 > 2001:48c8:1:105:21c:c0ff:feb2:8dbd.60658: Flags [.], ack 115, win 57230, options [nop,nop,TS val 1011388572 ecr 2698301684], length 1268
20:45:04.329633 IP6 2001:48c8:1:2::2 > 2620:12::5: ICMP6, packet too big, mtu 1280, length 1240
20:45:36.330504 IP6 2620:12::5.80 > 2001:48c8:1:105:21c:c0ff:feb2:8dbd.60658: Flags [.], ack 115, win 57230, options [nop,nop,TS val 1011391772 ecr 2698301684], length 1268
20:45:36.330584 IP6 2001:48c8:1:2::2 > 2620:12::5: ICMP6, packet too big, mtu 1280, length 1240
20:46:14.642299 IP6 2620:12::5.80 > 2001:48c8:1:105:21c:c0ff:feb2:8dbd.60658: Flags [R.], seq 400, ack 115, win 20000, length 0