Problem solve Get help with specific problems with your technologies, process and projects.

Neighbor discovery

My question concerns neighbor discovery.
If the link layer address is embedded in the IPv6 address why is a neighbor solicitation multicast message required to discover the link layer address of a neighbor?
Hi Gary,
Thank you for your question. This is a good thought. The problem with this is that the MAC address CAN be embedded in the IPv6 address, but doesn't have to. For instance one can choose to use DHCPv6 and use its own numbering system for IPv6 addresses. Others may use the privacy extensions defined in RFC 3041 or you may have some load balancing protocol for instance a router advertising one IP address to the link but having multiple interfaces serving that address.
Regards, Silvia
This was last published in August 2003

Dig Deeper on Network protocols and standards

Have a question for an expert?

Please add a title for your question

Get answers from a TechTarget expert on whatever's puzzling you.

You will be able to add details on the next page.

Start the conversation

Send me notifications when other members comment.

Please create a username to comment.