(In reply to comment #7) > Good idea, and the "problem" is the refid is a 32-bit structure. > > Its purpose is for loop detection - to make sure machine A doesn't > believe time from machine B if machine B is getting its time from A. > > I've had some chats with Prof. Mills about this and we're gently > discussing changing the refid value for non-refclock sources to a simple > nonce.
That's a separate issue from displaying the full server address. I actually have some where a subnet has the several servers, and I can't tell them apart; the initial part of the IP address matches several machines, and some machines have both A and AAAA records...so the names aren't unique either. it isn't pretty. As far as the reference address - I thought that for IPv6, the refid was a hash of the IPv6 address - which means it's already a nonce. There's some small probability of a collision (2 + n in 4 billion - 1 for IPv4 and 1 for IPv6 + the possibility that an IP address or hash turns out to be one of the refclock tags - e.g. .GPS., .PPS., .INIT etc - in binary). Now that bits are cheaper, perhaps NTPv5 can allocate 136 bits -- 8 for an entity id (IPv4 address, IPv6 address, and Refclock to start with) + a full IPv6 address at the end of the packet. Oooh - NTPv5? Well, maybe not. Just think of all the firewalls and other chaos ;-) In any case, displaying the full server IP address would be a big help. I don't have a strong opinion on whether the expanded format should require a command-line switch - such as -w. IPv6 will require any scripts that parse the text to change anyway - and humans won't care. But it would be a way to guarantee backward compatibility. Anyhow, after 4 years, it would be nice to see this addressed...IPv6 IS gathering steam. Thanks. -- You received this bug notification because you are a member of Ubuntu Server Team, which is subscribed to ntp in Ubuntu. https://bugs.launchpad.net/bugs/325111 Title: ntpq output truncates IPv6 addresses To manage notifications about this bug go to: https://bugs.launchpad.net/ntp/+bug/325111/+subscriptions -- Ubuntu-server-bugs mailing list Ubuntu-server-bugs@lists.ubuntu.com Modify settings or unsubscribe at: https://lists.ubuntu.com/mailman/listinfo/ubuntu-server-bugs
