Operation Manual – IPv6 Management
H3C S3100 Series Ethernet Switches Chapter 1 IPv6 Configuration
1-8
 Note:
z H3C S3100 Series Ethernet Switches do not support RS, RA, or Redirect message.
z Of the above mentioned IPv6 NDP functions, H3C S3100 Series Ethernet Switches
support the following three functions: address resolution, neighbor unreachability
detection, and duplicate address detection. The subsequent sections present a
detailed description of these three functions and relevant configuration.
The NDP mainly provides the following functions:
I. Address resolution
Similar to the ARP function in IPv4, a node acquires the link-layer address of neighbor
nodes on the same link through NS and NA messages.
Figure 1-3 shows how node A
acquires the link-layer address of node B.
Figure 1-3 Address resolution
The address resolution procedure is as follows:
1) Node A multicasts an NS message. The source address of the NS message is the
IPv6 address of the interface of node A and the destination address is the
solicited-node multicast address of node B. The NS message contains the
link-layer address of node A.
2) After receiving the NS message, node B judges whether the destination address
of the packet is the corresponding solicited-node multicast address of its own IPv6
address. If yes, node B learns the link-layer address of node A and returns an NA
message containing the link-layer address of node B in the unicast mode.
3) Node A acquires the link-layer address of node B from the NA message. After that,
node A and node B can communicate with each other.
II. Neighbor unreachability detection
After node A acquires the link-layer address of its neighbor node B, node A can verify
whether node B is reachable according to NS and NA messages.
To Next Page
Loading...
Need help?
General