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The multiple NS is expected - as we all have the last 2 hextets of our assigned address as 0:1, we all end up in multicast group ff02::1:ff00:1 as our solicited node multicast (uses the last 6 hex digits in this format - ff02::1:ffxx:xxxx) So, your address 2001:504:27::e0f:0:1, ends with the last 6 digits 00:0001 and creating a solicited node multicast you listen on ff02::1:ff00:0001. I end up the same with our global unicast address 2001:504:27::1055:0:1. Poor numbering scheme results in everyone in the same multicast group. My link local address is fe80::21d:a2ff:fef2:a32a, so I also join group ff02::1:fff2:a32a, but I am the only member there as my link local is the only that ends in f2:a32a. HTH, Andy Koch TDS Telecom - IP Network Operations [log in to unmask] Desk: 608-664-4694 Cell: 608-616-0072 Andy > -----Original Message----- > From: MICE Discuss [mailto:[log in to unmask]] On Behalf Of > James Stahr > Sent: Thursday, July 17, 2014 16:07 > To: [log in to unmask] > Subject: [MICE-DISCUSS] IPv6 neighbor solicitation at the exchange > > First off, Did anyone make any changes on 07/15/2014 around 08:00? > > The reason is that I think I've resolved an issue with our IPv6 peering > with the MICE route servers, Charter, and TDS and I'm looking for a > larger audience to see if it's my issue or perhaps an issue at the > exchange. I believe it to be the latter, but I'm not an IPv6 expert. > > Starting two days ago around 8am CDT, we started experiencing BGP > timeouts on some of our IPv6 BGP sessions. I was able to work around > the issue by removing our COPP policy and the BGP sessions were stable > for 24 hours. Reapplied the policy, sessions started to drop again. > Looked at the policy to see which category is being exceeded, it's not > the routing section which allows BGP/BFD/etc, but the ICMP-v6 one: > > > ipv6 access-list COPP-icmp-v6 > remark ICMP type 1/3,2,3/0,3/1,4/0,4/1,4/2,130,143 > permit icmp any any destination-unreachable > permit icmp any any packet-too-big > permit icmp any any time-exceeded > permit icmp any any parameter-problem > remark nd-na, nd-ns, ra, rs > permit icmp any any nd-na > permit icmp any any nd-ns > permit icmp any any router-advertisement > permit icmp any any router-solicitation > remark MLD - query, report_v2 > permit icmp any any mld-query > permit icmp any any 143 > > > which is being policed like this: > > class Icmp-v6 > police 32000 60000 120000 conform-action transmit exceed-action drop > > I've worked around the issue by making a 4x increase in the policing, > but the question I have is what happened at the exchange to provoke my > COPP policy? Alternatively, is this normal or indicate who has the > problem: > > > > r-pop-min-1#deb ipv6 icmp > ICMP Packet debugging is on > r-pop-min-1# > Jul 17 14:36:08.143 CDT: ICMPv6: Received N-Solicit, > Src=FE80::56E0:3200:50CE:4178, Dst=FF02::1:FF00:1 > Jul 17 14:36:08.178 CDT: ICMPv6: Received N-Solicit, > Src=FE80::221:9BFF:FE8A:D29D, Dst=FF02::1:FF00:1 > Jul 17 14:36:08.178 CDT: ICMPv6: Received N-Solicit, > Src=FE80::221:9BFF:FE8A:D29D, Dst=FF02::1:FF00:1 > Jul 17 14:36:08.178 CDT: ICMPv6: Received N-Solicit, > Src=FE80::221:9BFF:FE8A:D29D, Dst=FF02::1:FF00:1 > Jul 17 14:36:08.178 CDT: ICMPv6: Received N-Solicit, > Src=FE80::221:9BFF:FE8A:D29D, Dst=FF02::1:FF00:1 > Jul 17 14:36:08.178 CDT: ICMPv6: Received N-Solicit, > Src=FE80::221:9BFF:FE8A:D29D, Dst=FF02::1:FF00:1 > Jul 17 14:36:08.178 CDT: ICMPv6: Received N-Solicit, > Src=FE80::221:9BFF:FE8A:D29D, Dst=FF02::1:FF00:1 > Jul 17 14:36:08.281 CDT: ICMPv6: Received N-Solicit, > Src=2001:504:27::D1AF:0:2, Dst=FF02::1:FF00:1 > Jul 17 14:36:08.281 CDT: ICMPv6: Received N-Solicit, > Src=2001:504:27::D1AF:0:2, Dst=FF02::1:FF00:1 > Jul 17 14:36:08.285 CDT: ICMPv6: Received N-Solicit, > Src=2001:504:27::D1AF:0:2, Dst=FF02::1:FF00:1 > Jul 17 14:36:08.359 CDT: ICMPv6: Received N-Solicit, > Src=2001:504:27::D1AF:0:2, Dst=FF02::1:FF00:1 > Jul 17 14:36:08.433 CDT: ICMPv6: Received N-Solicit, > Src=FE80::221:9BFF:FE8A:D29D, Dst=FF02::1:FF00:1 > Jul 17 14:36:08.435 CDT: ICMPv6: Sent N-Solicit, > Src=FE80::CA4C:75FF:FE23:805, Dst=2001:504:27::8252:0:1 > Jul 17 14:36:08.459 CDT: ICMPv6: Received N-Advert, > Src=2001:504:27::8252:0:1, Dst=FE80::CA4C:75FF:FE23:805 > Jul 17 14:36:08.535 CDT: ICMPv6: Received N-Solicit, > Src=FE80::221:9BFF:FE8A:D29D, Dst=FF02::1:FF00:1 > Jul 17 14:36:08.535 CDT: ICMPv6: Received N-Solicit, > Src=FE80::221:9BFF:FE8A:D29D, Dst=FF02::1:FF00:1 > Jul 17 14:36:08.539 CDT: ICMPv6: Received N-Solicit, > Src=2001:504:27::D1AF:0:2, Dst=FF02::1:FF00:1 > Jul 17 14:36:08.559 CDT: ICMPv6: Received N-Solicit, > Src=2001:504:27::8252:0:1, Dst=FF02::1:FF00:1 > Jul 17 14:36:08.586 CDT: ICMPv6: Received N-Solicit, > Src=2001:504:27::B664:0:1, Dst=FF02::1:FF00:1 > Jul 17 14:36:08.617 CDT: ICMPv6: Received N-Solicit, > Src=2001:504:27::D1AF:0:2, Dst=FF02::1:FF00:1 > Jul 17 14:36:08.687 CDT: ICMPv6: Received N-Solicit, > Src=2001:504:27::D1AF:0:2, Dst=FF02::1:FF00:1 > Jul 17 14:36:08.782 CDT: ICMPv6: Received N-Solicit, > Src=2001:504:27::3BA3:0:1, Dst=FF02::1:FF00:1 > Jul 17 14:36:08.783 CDT: ICMPv6: Received N-Solicit, > Src=2001:504:27::3BA3:0:1, Dst=FF02::1:FF00:1 > Jul 17 14:36:08.783 CDT: ICMPv6: Received N-Solicit, > Src=2001:504:27::3BA3:0:1, Dst=FF02::1:FF00:1 > r-pop-min-1# > Jul 17 14:36:08.842 CDT: ICMPv6: Received N-Solicit, > Src=2001:504:27::D1AF:0:2, Dst=FF02::1:FF00:1 > Jul 17 14:36:08.990 CDT: ICMPv6: Received N-Solicit, > Src=2001:504:27::D1AF:0:2, Dst=FF02::1:FF00:1 > Jul 17 14:36:09.028 CDT: ICMPv6: Received N-Solicit, > Src=2001:504:27::D1AF:0:2, Dst=FF02::1:FF00:1 > Jul 17 14:36:09.070 CDT: ICMPv6: Received N-Solicit, > Src=2001:504:27::D1AF:0:2, Dst=FF02::1:FF00:1 > Jul 17 14:36:09.148 CDT: ICMPv6: Received N-Solicit, > Src=FE80::221:9BFF:FE8A:D29D, Dst=FF02::1:FF00:1 > Jul 17 14:36:09.191 CDT: ICMPv6: Received N-Solicit, > Src=FE80::221:9BFF:FE8A:D29D, Dst=FF02::1:FF00:1 > Jul 17 14:36:09.191 CDT: ICMPv6: Received N-Solicit, > Src=FE80::221:9BFF:FE8A:D29D, Dst=FF02::1:FF00:1 > Jul 17 14:36:09.191 CDT: ICMPv6: Received N-Solicit, > Src=FE80::221:9BFF:FE8A:D29D, Dst=FF02::1:FF00:1 > Jul 17 14:36:09.191 CDT: ICMPv6: Received N-Solicit, > Src=FE80::221:9BFF:FE8A:D29D, Dst=FF02::1:FF00:1 > Jul 17 14:36:09.191 CDT: ICMPv6: Received N-Solicit, > Src=FE80::221:9BFF:FE8A:D29D, Dst=FF02::1:FF00:1 > Jul 17 14:36:09.191 CDT: ICMPv6: Received N-Solicit, > Src=FE80::221:9BFF:FE8A:D29D, Dst=FF02::1:FF00:1 > Jul 17 14:36:09.203 CDT: ICMPv6: Received N-Solicit, > Src=FE80::221:9BFF:FE8A:D29D, Dst=FF02::1:FF00:1 > Jul 17 14:36:09.322 CDT: ICMPv6: Received N-Solicit, > Src=2001:504:27::D1AF:0:2, Dst=FF02::1:FF00:1 > Jul 17 14:36:09.322 CDT: ICMPv6: Received N-Solicit, > Src=2001:504:27::D1AF:0:2, Dst=FF02::1:FF00:1 > Jul 17 14:36:09.327 CDT: ICMPv6: Received N-Solicit, > Src=2001:504:27::D1AF:0:2, Dst=FF02::1:FF00:1 > Jul 17 14:36:09.399 CDT: ICMPv6: Received N-Solicit, > Src=2001:504:27::D1AF:0:2, Dst=FF02::1:FF00:1 > Jul 17 14:36:09.439 CDT: ICMPv6: Received N-Solicit, > Src=FE80::221:9BFF:FE8A:D29D, Dst=FF02::1:FF00:1 > Jul 17 14:36:09.481 CDT: ICMPv6: Received N-Solicit, > Src=2001:504:27::D1AF:0:2, Dst=FF02::1:FF00:1 > Jul 17 14:36:09.533 CDT: ICMPv6: Received N-Solicit, > Src=2001:504:27::B664:0:1, Dst=FF02::1:FF00:1 > Jul 17 14:36:09.572 CDT: ICMPv6: Received N-Solicit, > Src=FE80::221:9BFF:FE8A:D29D, Dst=FF02::1:FF00:1 > Jul 17 14:36:09.572 CDT: ICMPv6: Received N-Solicit, > Src=FE80::221:9BFF:FE8A:D29D, Dst=FF02::1:FF00:1 > Jul 17 14:36:09.581 CDT: ICMPv6: Received N-Solicit, > Src=2001:504:27::D1AF:0:2, Dst=FF02::1:FF00:1 > Jul 17 14:36:09.608 CDT: ICMPv6: Received N-Solicit, > Src=FE80::2E21:72FF:FE71:37B1, Dst=FF02::1:FF00:1 > Jul 17 14:36:09.613 CDT: ICMPv6: Received N-Solicit, > Src=2001:504:27::8252:0:1, Dst=FF02::1:FF00:1 > r-pop-min-1# > Jul 17 14:36:09.659 CDT: ICMPv6: Received N-Solicit, > Src=2001:504:27::D1AF:0:2, Dst=FF02::1:FF00:1 > Jul 17 14:36:09.831 CDT: ICMPv6: Received N-Solicit, > Src=2001:504:27::3BA3:0:1, Dst=FF02::1:FF00:1 > Jul 17 14:36:09.831 CDT: ICMPv6: Received N-Solicit, > Src=2001:504:27::3BA3:0:1, Dst=FF02::1:FF00:1 > Jul 17 14:36:09.831 CDT: ICMPv6: Received N-Solicit, > Src=2001:504:27::3BA3:0:1, Dst=FF02::1:FF00:1 > Jul 17 14:36:09.884 CDT: ICMPv6: Received N-Solicit, > Src=2001:504:27::D1AF:0:2, Dst=FF02::1:FF00:1 > Jul 17 14:36:10.069 CDT: ICMPv6: Received N-Solicit, > Src=2001:504:27::D1AF:0:2, Dst=FF02::1:FF00:1 > Jul 17 14:36:10.172 CDT: ICMPv6: Received N-Solicit, > Src=FE80::221:9BFF:FE8A:D29D, Dst=FF02::1:FF00:1 > Jul 17 14:36:10.223 CDT: ICMPv6: Received N-Solicit, > Src=FE80::221:9BFF:FE8A:D29D, Dst=FF02::1:FF00:1 > Jul 17 14:36:10.223 CDT: ICMPv6: Received N-Solicit, > Src=FE80::221:9BFF:FE8A:D29D, Dst=FF02::1:FF00:1 > Jul 17 14:36:10.223 CDT: ICMPv6: Received N-Solicit, > Src=FE80::221:9BFF:FE8A:D29D, Dst=FF02::1:FF00:1 > Jul 17 14:36:10.223 CDT: ICMPv6: Received N-Solicit, > Src=FE80::221:9BFF:FE8A:D29D, Dst=FF02::1:FF00:1 > Jul 17 14:36:10.223 CDT: ICMPv6: Received N-Solicit, > Src=FE80::221:9BFF:FE8A:D29D, Dst=FF02::1:FF00:1 > Jul 17 14:36:10.223 CDT: ICMPv6: Received N-Solicit, > Src=FE80::221:9BFF:FE8A:D29D, Dst=FF02::1:FF00:1 > Jul 17 14:36:10.223 CDT: ICMPv6: Received N-Solicit, > Src=FE80::221:9BFF:FE8A:D29D, Dst=FF02::1:FF00:1 > Jul 17 14:36:10.240 CDT: ICMPv6: Received N-Solicit, > Src=2001:504:27::D1AF:0:2, Dst=FF02::1:FF00:1 > Jul 17 14:36:10.320 CDT: ICMPv6: Received N-Solicit, > Src=2001:504:27::D1AF:0:2, Dst=FF02::1:FF00:1 > Jul 17 14:36:10.364 CDT: ICMPv6: Received N-Solicit, > Src=2001:504:27::D1AF:0:2, Dst=FF02::1:FF00:1 > Jul 17 14:36:10.441 CDT: ICMPv6: Received N-Solicit, > Src=2001:504:27::D1AF:0:2, Dst=FF02::1:FF00:1 > Jul 17 14:36:10.521 CDT: ICMPv6: Received N-Solicit, > Src=2001:504:27::D1AF:0:2, Dst=FF02::1:FF00:1 > Jul 17 14:36:10.573 CDT: ICMPv6: Received N-Solicit, > Src=FE80::221:9BFF:FE8A:D29D, Dst=FF02::1:FF00:1 > Jul 17 14:36:10.573 CDT: ICMPv6: Received N-Solicit, > Src=FE80::221:9BFF:FE8A:D29D, Dst=FF02::1:FF00:1 > Jul 17 14:36:10.588 CDT: ICMPv6: Received N-Solicit, > Src=2001:504:27::B664:0:1, Dst=FF02::1:FF00:1 > Jul 17 14:36:10.622 CDT: ICMPv6: Received N-Solicit, > Src=2001:504:27::D1AF:0:2, Dst=FF02::1:FF00:1 > Jul 17 14:36:10.659 CDT: ICMPv6: Received N-Solicit, > Src=2001:504:27::8252:0:1, Dst=FF02::1:FF00:1 > Jul 17 14:36:10.684 CDT: ICMPv6: Received N-Solicit, > Src=FE80::221:9BFF:FE8A:D29D, Dst=FF02::1:FF00:1 > Jul 17 14:36:10.817 CDT: ICMPv6: Received N-Solicit, > Src=2001:504:27::D1AF:0:2, Dst=FF02::1:FF00:1 > Jul 17 14:36:10.830 CDT: ICMPv6: Received N-Solicit, > Src=2001:504:27::3BA3:0:1, Dst=FF02::1:FF00:1 > Jul 17 14:36:10.830 CDT: ICMPv6: Received N-Solicit, > Src=2001:504:27::3BA3:0:1, Dst=FF02::1:FF00:1 > Jul 17 14:36:10.830 CDT: ICMPv6: Received N-Solicit, > Src=2001:504:27::3BA3:0:1, Dst=FF02::1:FF00:1 > Jul 17 14:36:10.853 CDT: ICMPv6: Received type 130, > Src=FE80::21B:DFF:FEE7:15C0, Dst=FF02::1 > r-pop-min-1# > Jul 17 14:36:10.908 CDT: ICMPv6: Received N-Solicit, > Src=2001:504:27::D1AF:0:2, Dst=FF02::1:FF00:1 > Jul 17 14:36:10.925 CDT: ICMPv6: Received N-Solicit, > Src=2001:504:27::D1AF:0:2, Dst=FF02::1:FF00:1 > > I'm thinking that the answer is that this is not normal, as it looks > like I'm getting duplicate solicitations in the same second. > > -James > > ######################################################################## > > To unsubscribe from the MICE-DISCUSS list, click the following link: > ?SUBED1=MICE-DISCUSS&A=1 ######################################################################## To unsubscribe from the 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