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Difference between Unicast local address (ULA) and Mesh-Local EID (ML-EID)

Hi,

I have a question about how IPv6 addressing works in an OpenThread network. I read in the OpenThread website that the ML-EID is also known a Unique Local Address (ULA). So, it seems like they are the same in terms of scope. Is there any difference between them?

https://openthread.io/guides/thread-primer/ipv6-addressing

ULA: fd11:22:0:0:ccf0:a5d5:3b90:6da2

ML-EID: fdde:ad00:beef:0:d7b4:3e5e.6315:d513

Top Replies

AndreasF over 6 years ago +1

Hi. ULA stands for Unique Local Address, it is an IPv6 address that is guaranteed to be unique for a device in a specified scope. For example, an ML-EID is a ULA for the mesh-local scope. ML-EID stands…