In message <[email protected]>, Masataka Ohta writes: > Mark Andrews wrote: > > > This doesn't prove that IPv6 is not operational. All it proves is > > people can misconfigure things. > > How do operators configure their equipments to treat > ICMP packet too big generated against multicast and > unicast?
Well you need to go out of your way to get a ICMP PTB for IPv6 multicast as the default is to fragment multicast packets at the source at network minimum mtu (RFC3542 - May 2003). That's not to say it won't happen. As for generation of PTB you rate limit them the way you do for IPv4. > Note that, even if they do not enable inter-subnet > multicast in their domains, the ICMP packets may > still transit over or implode within their domains. > > Note also that some network processors can't efficiently > distinguish ICMP packets generated against multicast and > unicast. And why do you need to distingish them? You look at the inner packet not the ICMP source if you want to rate limit return traffic. > Masataka Ohta -- Mark Andrews, ISC 1 Seymour St., Dundas Valley, NSW 2117, Australia PHONE: +61 2 9871 4742 INTERNET: [email protected]
