Xiao Min, Thanks for addressing Greg's comments. I some additional comment on Greg's points:
> On Apr 6, 2023, at 3:35 AM, <[email protected]> <[email protected]> > wrote: > The draft describes how the destination IP address of the Echo packet is set. > Are there any special considerations for selecting IPv6 destination address? > > [XM]>>> The draft currently says "Device A would send BFD Unaffiliated Echo > packets with IP destination address destined for itself, such as the IP > address of interface 1 of device A". No any special considerations. > > One of the considerations may be whether a IPv6 link local address is preferable to a global address. The only consideration for the draft as it is written is that the address used as the destination may be looped back by the unaffiliated device. Link local helps address the security considerations that impact this feature, and it might be worth noting that when link local can be used for the use case that it assists in this point. > Also, are there any special considerations for selecting the source IP > address for IPv4 and/or IPv6 network? > > [XM]>>> No. If you have any suggestions, please let me know. :) > > Since the feature is intended to be used for single-hop, the source address SHOULD be an address on the shared subnet with the interface of the device that is looping the packets back. Perhaps it might even be reasonable to require that the source and destination addresses are identical when possible? Where this may complicate procedure is the initial demultiplexing step when the session is Down. Once the session is Up, the Discriminators can be used for this purpose. -- Jeff
