1、#CiscoLive#CiscoLiveFish Fishburne,CCIE#2639,CCDE#2009:14BRKIPV-1616IPv6-What Do you Mean there isnt a Broadcast?2023 Cisco and/or its affiliates.All rights reserved.Cisco Public#CiscoLiveEnter your personal notes hereCisco Webex App Questions?Use Cisco Webex App to chat with the speaker after the s

2、essionFind this session in the Cisco Live Mobile AppClick“Join the Discussion”Install the Webex App or go directly to the Webex spaceEnter messages/questions in the Webex spaceHowWebex spaces will be moderated by the speaker until June 9,2023.12343https:/ 2023 Cisco and/or its affiliates.All rights

3、reserved.Cisco PublicBRKENT-16163 2023 Cisco and/or its affiliates.All rights reserved.Cisco Public#CiscoLiveIPv6 My Journey as a Newbie to IPv6BRKENT-16164 2023 Cisco and/or its affiliates.All rights reserved.Cisco Public#CiscoLiveIPv6 My Journey as a Newbie to IPv6BRKENT-16165 2023 Cisco and/or it

4、s affiliates.All rights reserved.Cisco Public#CiscoLiveIPv6 My Journey as a Newbie to IPv6BRKENT-16166 2023 Cisco and/or its affiliates.All rights reserved.Cisco Public#CiscoLivePart 1 of 7:Understanding IPv6:The Journey BeginsPart 2 of 7:Understanding IPv6:Link-Local MagicPart 3 of 7:Understanding

5、IPv6:A Sniffer Full Of 3sPart 4 of 7:Understanding IPv6:What Is Solicited-Node Multicast?Part 5 of 7:Understanding IPv6:Prepping For Solicited-Node MulticastPart 6 of 7:Understanding IPv6:The Ping Before Solicited-Node MulticastPart 7 of 7:Understanding IPv6:Solicited-Node Multicast In Actionhttps:/

6、 2023 Cisco and/or its affiliates.All rights reserved.Cisco PublicAgendaShow a Magic TrickExplain How the Magic Trick worksResolving The Destination MAC AddressSetting the Stage:Picking Things Up off the WirePutting the Puzzle Pieces TogetherBRKENT-16168 2023 Cisco and/or its affiliates.All rights r

7、eserved.Cisco Public#CiscoLiveSPOILERS!BRKENT-16169 2023 Cisco and/or its affiliates.All rights reserved.Cisco Public#CiscoLiveSpoiler#1:It All Starts with Knowing the AddressBRKENT-161610 2023 Cisco and/or its affiliates.All rights reserved.Cisco Public#CiscoLiveSpoiler#2:Types of IPv6 AddressesFF0

8、2:5FE80:2237:6ff:fecf:67e4FE80:12001:DB8:AB:2FF02:1:FFAB:233:33:FF:AB:00:02MulticastIPv6 Layer 3AddressUnicastLayer 2Multicast MACBRKENT-161611 2023 Cisco and/or its affiliates.All rights reserved.Cisco Public#CiscoLiveSpoiler#3:Show IPv6 Interface2 IPv6 Addresses:2 IPv6 Addresses:FE80:1FE80:12001:D

9、B8:AB:12001:DB8:AB:12 IPv6 Solicited2 IPv6 Solicited-Node Multicast Groups to JoinNode Multicast Groups to JoinFF02:1:FF00:1FF02:1:FF00:1FF02:1:FFAB:1FF02:1:FFAB:1BRKENT-161612#CiscoLive 2023 Cisco and/or its affiliates.All rights reserved.Cisco PublicAgendaShow a Magic TrickExplain How the Magic Tr

10、ick worksResolving The Destination MAC AddressSetting the Stage:Picking Things Up off the WirePutting the Puzzle Pieces TogetherBRKENT-161613Setting the Stage:Picking Things Up off the Wire 2023 Cisco and/or its affiliates.All rights reserved.Cisco Public#CiscoLivePicking Things Up Off the Wire Wire

11、10.10.10.1010.10.10.1010.10.10.210.10.10.25C52.3000.000ALayer 2TrafficC464:130A:B0005C52.3000.000AC464.130A:B000?FFFF.FFFF.FFFFFFFF.FFFF.FFFFBRKENT-161615 2023 Cisco and/or its affiliates.All rights reserved.Cisco Public#CiscoLivePicking Things Up Off the Wire Wire10.10.10.1010.10.10.1010.10.10.210.

12、10.10.2Layer 2Traffic5C52.3000.000AC464:130A:B0005C52.3000.000AC464.130A:B000FFFF.FFFF.FFFFFFFF.FFFF.FFFF Unicast MACUnicast MAC Broadcast MACBroadcast MACFFFF.FFFF.FFFFFFFF.FFFF.FFFFFFFF.FFFF.FFFFFFFF.FFFF.FFFFBRKENT-161616 2023 Cisco and/or its affiliates.All rights reserved.Cisco Public#CiscoLive

13、Picking Things Up Off the Wire IPv6Wire10.10.10.1010.10.10.1010.10.10.210.10.10.25C52.3000.000ALayer 2TrafficC464:1300:0015C52.3000.000AC464.1300:00012001:db8:10:A2001:db8:10:A2001:db8:10:22001:db8:10:2?FFFF.FFFF.FFFFFFFF.FFFF.FFFFBRKENT-161617 2023 Cisco and/or its affiliates.All rights reserved.Ci

14、sco Public#CiscoLivePicking Things Up Off the Wire Wire10.10.10.1010.10.10.1010.10.10.210.10.10.2Layer 2Traffic5C52.3000.000AC464:130A:B0005C52.3000.000AC464.130A:B000FFFF.FFFF.FFFFFFFF.FFFF.FFFF Unicast MACUnicast MAC Broadcast MACBroadcast MACFFFF.FFFF.FFFFFFFF.FFFF.FFFFFFFF.FFFF.FFFFFFFF.FFFF.FFF

15、FBRKENT-161618 2023 Cisco and/or its affiliates.All rights reserved.Cisco Public#CiscoLiveAlzatte la mano se vivetti en ItaliaAlzatte la mano se vivetti en Italia19BRKENT-1616 2023 Cisco and/or its affiliates.All rights reserved.Cisco Public#CiscoLivePicking Things Up Off the Wire WireTraffic5C52.30

16、00.000AC464:130A:B000 Unicast MACUnicast MAC Broadcast MACBroadcast MACFFFF.FFFF.FFFFFFFF.FFFF.FFFFFFFF.FFFF.FFFFFFFF.FFFF.FFFFAlzatte la mano se vivetti en ItaliaAlzatte la mano se vivetti en Italia?Multicast MACBRKENT-161620 2023 Cisco and/or its affiliates.All rights reserved.Cisco Public#CiscoLi

17、vePicking Things Up Off the Wire WireLayer 2Traffic Multicast MACMulticast MAC10.10.10.210.10.10.2C464:130A:B00010.10.10.310.10.10.3C464:130A:B00110.10.10.910.10.10.910.10.10.1010.10.10.10Join Multicast Group239.1.1.1239.1.1.10100.5E01.0101 OSPF 0100.5E00.00050100.5E00.0005BRKENT-161621 2023 Cisco a

18、nd/or its affiliates.All rights reserved.Cisco Public#CiscoLivePicking Things Up Off the Wire Multicast MACMulticast MACMAC ADDRESS RANGE MAC ADDRESS RANGE 0101-0000-5E5E-00-00-00 0101-0000-5E5E-7F-FF-FF“An IP host group address is mapped to an Ethernet multicast address by placing the low-order 23-

19、bits of the IP address into the low-order 23 bits of the Ethernet multicast address 01-00-5E-00-00-00(hex).Because there are 28 significant bits in an IP host group address,more than one host group address may map to the same Ethernet multicast address.”(RFC 1112)IP ADDRESS RANGE IP ADDRESS RANGE 22

20、4.0.0.0224.0.0.0 239.255.255.255239.255.255.255WireTrafficBRKENT-161622 2023 Cisco and/or its affiliates.All rights reserved.Cisco Public#CiscoLivePicking Things Up Off the Wire WireLayer 2Traffic Multicast MACMulticast MAC0100.5E01.01010100.5E00.0005MAC ADDRESS RANGE MAC ADDRESS RANGE 0101-0000-5E5

21、E-00-00-00 0101-0000-5E5E-7F-FF-FF239.1.1.1239.1.1.1224.0.0.5224.0.0.5BRKENT-161623 2023 Cisco and/or its affiliates.All rights reserved.Cisco Public#CiscoLivePicking Things Up Off the Wire Wire10.10.10.1010.10.10.1010.10.10.210.10.10.2Layer 2Traffic5C52.3000.000AC464:130A:B0005C52.3000.000AC464.130

22、A:B000FFFF.FFFF.FFFFFFFF.FFFF.FFFF Unicast MACUnicast MAC Broadcast MACBroadcast MACFFFF.FFFF.FFFFFFFF.FFFF.FFFFFFFF.FFFF.FFFFFFFF.FFFF.FFFF0100.5E01.01010100.5E00.0005 Multicast MACMulticast MACBRKENT-161624 2023 Cisco and/or its affiliates.All rights reserved.Cisco Public#CiscoLivePicking Things U

23、p Off the Wire IPv6Wire5C52.3000.000ALayer 2TrafficC464:1300:0015C52.3000.000AC464.1300:00012001:2001:db8:10db8:10:A:A2001:db8:10:22001:db8:10:2?BRKENT-161625 2023 Cisco and/or its affiliates.All rights reserved.Cisco Public#CiscoLivePing Ping 2001:DB8:AB:2Picking Things Up Off the Wire IPv6IPv6:200

24、1:DB8:AB:2/64mac:c464.130a.b000Gig 0/0/0Router ARouter BGig 0/0/0IPv6:2001:DB8:AB:1/64mac:c464.130a.a280.DestinationMACSourceMACDestinationIPSourceIPBRKENT-161626The Magic Trick 2023 Cisco and/or its affiliates.All rights reserved.Cisco Public#CiscoLiveThe Magic TrickBRKENT-161628How The Magic Trick

25、 Works 2023 Cisco and/or its affiliates.All rights reserved.Cisco Public#CiscoLiveFF02:5 FF02:5 FF02:5FE80:2237:6ff:fecf:67e4FE80:5a0a:20ff:feeb:91e4FE80:2237:6ff:fecf:67e4FE80:5a0a:20ff:feeb:91e4How the Magic Trick WorksSource IPsSource IPsDestination IPsDestination IPsBRKENT-161630FF02:5 FF02:5 20

26、23 Cisco and/or its affiliates.All rights reserved.Cisco Public#CiscoLiveFF02:5 How the Magic Trick WorksFF02:5FF02:5 FF02:5 BRKENT-161632 2023 Cisco and/or its affiliates.All rights reserved.Cisco Public#CiscoLiveHow the Magic Trick WorksRFC4291,Section 2.4RFC4291,Section 2.4BRKENT-161633 2023 Cisc

27、o and/or its affiliates.All rights reserved.Cisco Public#CiscoLiveMulticastMulticastLocal:Local:They are local to the wire they are on.Common interest:Common interest:If a router wants to participate in EIGRP,it already knows the local multicast address(IPv4/IPv6)to start to listen to and the corres

28、ponding MAC address.Join:Join:“Join”just by just deciding to listen to a local multicast address and then,by extension,to the corresponding MAC address for that multicast IP address.How the Magic Trick WorksBRKENT-161634 2023 Cisco and/or its affiliates.All rights reserved.Cisco Public#CiscoLiveLink

29、-Local Scope Multicast Address10.10.10.1mac:2037.06cf.67e410.10.10.2mac:580a.20eb.91e4BRKENT-161635 2023 Cisco and/or its affiliates.All rights reserved.Cisco Public#CiscoLivePicking Things Up Off the Wire WireIPv4 Unicast:10.10.10.2IPv4 Unicast:10.10.10.2Layer 2TrafficC464:1300:001C464.1300:0001FFF

30、F.FFFF.FFFF0100.5e00.0005IPv4 Multicast:224.0.0.5IPv4 Multicast:224.0.0.5BRKENT-161636 2023 Cisco and/or its affiliates.All rights reserved.Cisco Public#CiscoLiveLink-Local Scope Multicast Address“The low 32 bits an Ethernet address for IPv6 multicast traffic are the low 32 bits of the multicast IPv

31、6 address used.For example,IPv6 multicast traffic using the address ff02:d uses the MAC address 33-33-00-00-00-0D,and traffic to ff05:1:3 goes to the MAC address 33-33-00-01-00-03.”IPv6 Multicast MAC ADDRESS IPv6 Multicast MAC ADDRESS RANGE RANGE 33-33-00-00-00-00 through33-33-FF-FF-FF-FF-https:/en.

32、wikipedia.org/wiki/Multicast_addressBRKENT-161637 2023 Cisco and/or its affiliates.All rights reserved.Cisco Public#CiscoLivePicking Things Up Off the Wire WireLayer 2TrafficC464:1300:001C464.1300:00013333.0000.0005IPv6 Multicast:FF02:5IPv6 Multicast:FF02:5IPv6 Unicast 2001:db8:10:2IPv6 Unicast 2001

33、:db8:10:2 Unicast MACUnicast MAC Multicast MACMulticast MACBRKENT-161638 2023 Cisco and/or its affiliates.All rights reserved.Cisco Public#CiscoLiveLink-Local MulticastMulticastFF02:533:33:00:00:00:05MulticastIPv6 Layer 3AddressLayer 2Multicast MACLocal LinkBRKENT-161639FE80:2237:6ff:fecf:67e4FE80:5

34、a0a:20ff:feeb:91e4 2023 Cisco and/or its affiliates.All rights reserved.Cisco Public#CiscoLiveFE80:2237:6ff:fecf:67e4FE80:5a0a:20ff:feeb:91e4How the Magic Trick WorksFE80:FE80:BRKENT-161641 2023 Cisco and/or its affiliates.All rights reserved.Cisco Public#CiscoLiveHow the Magic Trick WorksFE80:FE80:

35、BRKENT-161642 2023 Cisco and/or its affiliates.All rights reserved.Cisco Public#CiscoLiveHow the Magic Trick WorksFE80:2237:6ff:fecf:67e4FE80:5a0a:20ff:feeb:91e4“Link“Link-Local”UnicastLocal”UnicastFE80:FE80:RFC4291,Section 2.4RFC4291,Section 2.4FE80:FE80:BRKENT-161643 2023 Cisco and/or its affiliat

36、es.All rights reserved.Cisco Public#CiscoLiveHow the Magic Trick WorksFE80:FE80:A host is REQUIREDREQUIRED to havea link-local address for each interfaceRFC4291,Section 2.4RFC4291,Section 2.4FE80:2237:6ff:fecf:67e4FE80:5a0a:20ff:feeb:91e4BRKENT-161644 2023 Cisco and/or its affiliates.All rights rese

37、rved.Cisco Public#CiscoLiveHow the Magic Trick WorksFE80:FE80:A host is requiredrequiredto have and recognizehave and recognize its link local unicast link local unicast addressFE80:2237:6ff:fecf:67e4FE80:5a0a:20ff:feeb:91e4BRKENT-161645 2023 Cisco and/or its affiliates.All rights reserved.Cisco Pub

38、lic#CiscoLiveLink-Local UnicastUnicast AddressFE80:2237:6ff:fecf:67e4MulticastIPv6 Layer 3AddressUnicastLocal LinkFE80:5a0a:20ff:feeb:91e4BRKENT-161646 2023 Cisco and/or its affiliates.All rights reserved.Cisco Public#CiscoLiveFF02:5 FF02:5 FF02:5FE80:2237:6ff:fecf:67e4FE80:5a0a:20ff:feeb:91e4FE80:2

39、237:6ff:fecf:67e4FE80:5a0a:20ff:feeb:91e4How the Magic Trick WorksSource IPsSource IPsDestination IPsDestination IPsFF02:5 FF02:5 FE80:FE80:47 2023 Cisco and/or its affiliates.All rights reserved.Cisco Public#CiscoLiveLink-LocalFF02:5FE80:2237:6ff:fecf:67e4MulticastIPv6 Layer 3AddressUnicastLayer 2M

40、ulticast MACFE80:5a0a:20ff:feeb:91e4LinkLocal33:33:00:00:00:05BRKENT-161648Resolving DestinationMAC Address 2023 Cisco and/or its affiliates.All rights reserved.Cisco Public#CiscoLiveResolving the Destination MAC AddressBRKENT-161650 2023 Cisco and/or its affiliates.All rights reserved.Cisco Public#

41、CiscoLiveA node is required to compute and join(on the appropriate interface)the associated solicited-node multicast addresses for all unicast and anycast addresses that have been configured for the nodes interfaces(manually or automatically).A SolicitedA Solicited-Node multicast addressNode multica

42、st addressis formed by taking the low-order 24 bits of an address(unicast or anycast)andappending those bits to the prefix FF02:0:0:0:0:1:FF00:/104 resulting in a multicast address in the range FF02:0:0:0:0:1:FF00:0000 to FF02:0:0:0:0:1:FFFF:FFFFSnippets from RFC4291 section 2.7Solicited-Node Multic

43、astBRKENT-1616 2023 Cisco and/or its affiliates.All rights reserved.Cisco Public#CiscoLiveIPv6 address 4037:01:800:200E:8C6C*MUST listen for the multicast address FF02:1:FF0E:8C6C.Solicited-Node MulticastIPv6 address 2001:DB8:AB:2 MUST listen for the multicast address FF02:1:FFABAB:0002Low-order 24

44、bits of an address(unicast or anycast)andappend those bits to the prefix FF02:0:0:0:0:1:FF00:/104 Snippets from RFC4291 section 2.7*BRKENT-161652 2023 Cisco and/or its affiliates.All rights reserved.Cisco Public#CiscoLiveA node is required to compute and join the associated solicited-node multicast

45、address for all unicast addressesCompute Associated solicitednode multicast:Resolving the Destination MAC AddressFF02:0:0:0:0:1:FFAB:0002IPv6 Unicast Address:2001:DB8:AB:2=2001:DB8:0:0:0:0:00AB:0002BRKENT-161653 2023 Cisco and/or its affiliates.All rights reserved.Cisco Public#CiscoLiveResolving the

46、 Destination MAC AddressCompute Associated solicitednode multicast:FF02:0:0:0:0:1:FFAB:0002IPv6 Unicast Address:2001:DB8:AB:2=2001:DB8:0:0:0:0:00AB:0002 2023 Cisco and/or its affiliates.All rights reserved.Cisco Public#CiscoLiveSpoiler#1:It All Starts with Knowing the AddressBRKENT-161655 2023 Cisco

47、 and/or its affiliates.All rights reserved.Cisco Public#CiscoLiveSolicited-Node Multicast FF02:1:FFAB:2 is the Solicited-Node Multicast Address for 2001:DB8:AB:2FF02:1:FFAB:2MulticastIPv6 Layer 3AddressLink Local56 2023 Cisco and/or its affiliates.All rights reserved.Cisco Public#CiscoLiveResolving

48、the Destination MAC AddressBRKENT-161657 2023 Cisco and/or its affiliates.All rights reserved.Cisco Public#CiscoLiveResolving the Destination MAC AddressBRKENT-161658Putting the Puzzles Pieces Together 2023 Cisco and/or its affiliates.All rights reserved.Cisco Public#CiscoLiveNeighbor Discovery Prot

49、ocolThe Final PieceBRKENT-161660 2023 Cisco and/or its affiliates.All rights reserved.Cisco Public#CiscoLiveThe Final PieceWireLayer 2TrafficC464:130a:b000C464.1300:00013333.FFAB.0002Solicited Node Multicast:FF02:1:FFAB:2Solicited Node Multicast:FF02:1:FFAB:2IPv6 Unicast 2001:db8:AB:2IPv6 Unicast 20

50、01:db8:AB:2BRKENT-161661 2023 Cisco and/or its affiliates.All rights reserved.Cisco Public#CiscoLivePart 1 of 7:Understanding IPv6:The Journey BeginsPart 2 of 7:Understanding IPv6:Link-Local MagicPart 3 of 7:Understanding IPv6:A Sniffer Full Of 3sPart 4 of 7:Understanding IPv6:What Is Solicited-Node

51、 Multicast?Part 5 of 7:Understanding IPv6:Prepping For Solicited-Node MulticastPart 6 of 7:Understanding IPv6:The Ping Before Solicited-Node MulticastPart 7 of 7:Understanding IPv6:Solicited-Node Multicast In Actionhttps:/ IPv6 Blog SeriesBRKENT-161663 2023 Cisco and/or its affiliates.All rights res

52、erved.Cisco Public#CiscoLivehttp:/ Part IPv6 Networking Detection FunBRKENT-161664 2023 Cisco and/or its affiliates.All rights reserved.Cisco Public#CiscoLiveFill out your session surveys!Attendees who fill out a minimum of four session surveys and the overall event survey will get Cisco Live-brande

53、d socks(while supplies last)!These points help you get on the leaderboard and increase your chances of winning daily and grand prizesAttendees will also earn 100 points in theCisco Live Challenge for every survey completed.BRKENT-161665 2023 Cisco and/or its affiliates.All rights reserved.Cisco Publ

54、icContinue your educationVisit the Cisco Showcase for related demosBook your one-on-oneMeet the Engineer meetingAttend the interactive education with DevNet,Capture the Flag,and Walk-in LabsVisit the On-Demand Library for more sessions at www.CiscoL you#CiscoLive 2023 Cisco and/or its affiliates.All

55、 rights reserved.Cisco Public#CiscoLiveGamify your Cisco Live experience!Get points Get points for attending this session!for attending this session!Open the Cisco Events App.Click on Cisco Live Challenge in the side menu.Click on View Your Badges at the top.Click the+at the bottom of the screen and scan the QR code:How:123468 2023 Cisco and/or its affiliates.All rights reserved.Cisco PublicBRKENT-161668#CiscoLive