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

JaeHoon wrote:

> 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.

Such ping request/response can be blocked 
not based on address filtering but service filtering.

- Youn-Hee