Question

In preparing for an IPv6 implementation at your company, you are responsible for providing basic IPv6 operations information to the desktop support team. One of your topics in your document is to describe the overall functions of Neighbor Discover operations, specifically Neighbor Solicitation and Neighbor Advertisement messages and what they provide an IPv6 node on the network.

Detail the components these two ND processes provide and also provide the specific Wireshark display filer required to quickly view these processes when capturing network traffic.

Answer 1

Neighbor Discovery is a vital part of IPv6 networks, including Neighbor Solicitation and Neighbor Advertisement. NS is used to determine the link-layer address of a neighbor, while NA announces the link-layer address. The Wireshark display filters for NS and NA are icmpv6.type == 135 and icmpv6.type == 136, respectively.

Step-by-step explanation:

Neighbor Discovery (ND) is a crucial component of IPv6 networks. It is responsible for identifying and locating neighboring nodes on the network. Two important ND processes are Neighbor Solicitation (NS) and Neighbor Advertisement (NA).

Neighbor Solicitation is used when an IPv6 node needs to determine the link-layer address of a neighbor or to detect if a neighbor is still reachable. Neighbor Solicitation messages are sent as multicast. The NS message contains the IPv6 address of the sender and the target's IPv6 address.

Neighbor Advertisement is used to announce the link-layer address of a node to its neighbors or to inform other nodes about a change in the link-layer address. Neighbor Advertisement messages are sent as unicast. The NA message contains the link-layer address and the IPv6 address of the sender.

When capturing network traffic with Wireshark, the display filter for Neighbor Solicitation is icmpv6.type == 135 and for Neighbor Advertisement is icmpv6.type == 136. These filters will help isolate these specific ND processes in captured packets.