H3C S5500-SI Series Operation Manual

Also see for S5500-SI Series: Configuration Operation manual Configuration guide Configuration guide Configuration guide

Operation Manual – IPv6 ConfigurationH3C S5500-SI Series Ethernet Switches Chapter 1 IPv6 Configuration1-91) Node A multicasts an NS message. The source address of the NS message is theIPv6 address for the interface of node A and the destination address is thesolicited-node multicast address of node B. The NS message contains thelink-layer address of node A.2) After receiving the NS message, node B judges whether the destination addressof the packet is the corresponding solicited-node multicast address of its own IPv6address. If yes, node B returns an NA message containing the link-layer addressof node B.3) Node A acquires the link-layer address of node B fro the NA message. After that,node A and node B can communicate.II. Neighbor unreachability detectionAfter node A acquires the link-layer address of its neighbor node B, node A can verifywhether node B is reachable according to NS and NA messages.1) Node A sends an NS message whose destination address is the IPv6 address ofnode B.2) If node A receives an NA message from node B, node A considers that node B isreachable. Otherwise, node B is unreachable.III. Duplicate address detectionAfter node A acquires an IPv6 address, it should perform the duplicate addressdetection to determine whether the address is being used by other nodes (similar to thegratuitous ARP function).The duplication address detection is accomplished throughNS and NA messages. Figure shows the duplicate address detection procedure.NSNAICMP Type = 135Src = ::Dst = FF02::1:FF00:1NSNAData = 2000::1 ICMP TySrc = 20Dst = FF02::1Target AA Bpe = 13600::1ddress = 2000::1nFigure 1-5 Duplicate address detectioThe duplicate address detection procedure is as follows:1) Node A sends an NS message whose source address is the unassigned address ::and destination address is the corresponding solicited-node multicast address ofthe IPv6 address to be detected. The NS message contains the IPv6 address.2) If node B uses this IPv6 address, node B returns an NA message. The NAmessage contains the IPv6 address of node B.

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