FWD: [GLOBAL-V6] draft-narten-iana-rir-ipv6-considerations-00.txt
FYI. The global-v6 list appears to still be active, and perhaps we can revive the list to talk about things that really cross the entire RIR community. Thomas ------- Forwarded Message From: Thomas Narten <narten@us.ibm.com> To: global-v6@lists.apnic.net Date: Thu, 14 Jul 2005 09:40:34 +0200 Subject: [GLOBAL-V6] draft-narten-iana-rir-ipv6-considerations-00.txt I think/hope the global-v6 is still in operation, so this is a bit of a test... I've written a document that attempts to give background and describe the bigger picture w.r.t. IPv6 address space management and the various issues that are now being discussed (e.g., hd ratio, /48 boundary, etc.). This document is intended to provide information and explain the broader landscape, rather than propose specific changes, etc. I'd welcome discussion/feedback on it, and this list seems as good a place as any. http://www.ietf.org/internet-drafts/draft-narten-iana-rir-ipv6-consideration... Likewise, there is another document that will be discussed at the upcoming Paris IETF meeting. http://www.ietf.org/internet-drafts/draft-narten-ipv6-3177bis-48boundary-00.... That document will be discussed in the IPv6 WG: http://www.ietf.org/html.charters/ipv6-charter.html mailing list: https://www1.ietf.org/mailman/listinfo/ipv6 Finally, significant discussion on the general topic has already place (and continues) in the ARIN and RIPE regions. Folk may want to review/follow some of the discussions that have taken place there: http://www.ripe.net/mailman/listinfo/address-policy-wg http://lists.arin.net/mailman/listinfo/ppml (I believe the pointers to the ARIN/RIPE discussions have been sent to APNIC lists, but I don't believe a lot of discussion has taken place there - yet). Thomas _______________________________________________ global-v6 mailing list global-v6@lists.apnic.net http://mailman.apnic.net/mailman/listinfo/global-v6 ------- End of Forwarded Message
Thomas, all,
I'd welcome discussion/feedback on it, and this list seems as good a place as any.
http://www.ietf.org/internet-drafts/draft-narten-iana-rir-ipv6-consideration...
This is nit-picking, but for the sake of clarity: 2.7. Utilization In IPv4, the utilization of a chunk of address space is defined as the ratio of the actual number of host assignments to the theoretical maximum number of host assignments. For example, a /24 in IPv4 can number 256 hosts [...] A /24 can't number 256 hosts; it can number 254. Niall
On Thu, Jul 14, 2005 at 02:47:26PM +0100, Niall Murphy wrote:
Thomas, all,
I'd welcome discussion/feedback on it, and this list seems as good a place as any.
http://www.ietf.org/internet-drafts/draft-narten-iana-rir-ipv6-consideration...
This is nit-picking, but for the sake of clarity:
2.7. Utilization
In IPv4, the utilization of a chunk of address space is defined as the ratio of the actual number of host assignments to the theoretical maximum number of host assignments. For example, a /24 in IPv4 can number 256 hosts [...]
A /24 can't number 256 hosts; it can number 254.
an IPv4 /24 is 192.0.2.0-192.0.2.255 or 256 discreate numbers. subtract the all-ones and all-zeros.. 256-2 = 254... BUT ... wrap the /24 into a /22 and you -CAN- use the (apparent) zero & one nubmers are host assignments. the trick is in the mask and the placement of the "/24" in the overall announcement... you can't have an all-ones or all-zeros for the host.
Niall
--bill
Hi! Why not? It CAN. You said about /24 bounded into one ethernet network. But for example I am giving my users real IP over VPN connection. As it is point-to-point connection, there is no network and broadcast addresses at all, and x.x.x.0, x.x.x.255 works. Same is for dial-up. But! Seldom I am experiencing some problems with that kind of addresses. There is a number misconfigured "antihackers" filters on the Net blocks .0 and .255 as they thinks it is always broadcasts. A bit soul-save discussion with such admins usually fixes the problem ;)
Thomas, all,
I'd welcome discussion/feedback on it, and this list seems as good a place as any.
http://www.ietf.org/internet-drafts/draft-narten-iana-rir-ipv6-considerat ions-00.txt
This is nit-picking, but for the sake of clarity:
2.7. Utilization
In IPv4, the utilization of a chunk of address space is defined as the ratio of the actual number of host assignments to the theoretical maximum number of host assignments. For example, a /24 in IPv4 can number 256 hosts [...]
A /24 can't number 256 hosts; it can number 254.
Niall
-- WBR, Max Tulyev (MT6561-RIPE, 2:463/253@FIDO)
On Fri, 15 Jul 2005, Max Tulyev wrote:
But! Seldom I am experiencing some problems with that kind of addresses. There is a number misconfigured "antihackers" filters on the Net blocks .0 and .255 as they thinks it is always broadcasts. A bit soul-save discussion with such admins usually fixes the problem ;)
Unfortunately this is not the experience I have from the field. We're using superneted /20 blocks composed out of `class c'-ranges for cable-tv broadband customers. I had to change the DHCP-server to prevent the assignment of .0 and .255 since we've got a lot of problems with such misconfigured filters in the net and we didn't have the time for all those 'soul-save' discussions with admins not understanding the concept of classless ip-routing. Patrick
participants (5)
-
bmanning＠vacation.karoshi.com -
Max Tulyev -
Niall Murphy -
Patrick.Guelat＠imp.ch -
Thomas Narten