Re: I-D ACTION:draft-hoon-mobileip-undad-00.txt

Hi, Greg

Thanks a lot for your interest in our draft.

I have a question about following sentence.
> The ping ff02::1 won't work.
> Existing hosts don't have to respond to the message.

FF02::1 is already reserved in RFC.
And futhermore, I could not find that some host may not respond to ff02::1
in any RFC due to firewall.
Let me know reliable reference.
I usally used ff02::1 or ff02::2 in our lab and ETSI test event.
I just have been confused in what you mentioned.

Thanks
Jaehoon Kim.