Questions on Provider Independent IPv4 addresses,
Hello, I read with interest the ripe-234 document on IPv4 address allocation. It raised me the following questions on PI addresses: 1) Usage of PI addresses is not recommended by RIPE. I don't want to raise a debate on this point. However, I would be interested in knowing the reasons for this. Is it for routing purpose? 2) How could I find statistics on PI allocated addresses (by RIPE or globally)? Please apologise, if it is not the best appropriate place, where to ask such questions. I looked for the answer on the RIPE web site. But, I couldn't find the information. Regards, Thomas Levy
Hi Thomas, Thomas.Levy@alcatel.fr wrote:
Hello,
I read with interest the ripe-234 document on IPv4 address allocation. It raised me the following questions on PI addresses: 1) Usage of PI addresses is not recommended by RIPE. I don't want to raise a debate on this point. However, I would be interested in knowing the reasons for this. Is it for routing purpose? 2) How could I find statistics on PI allocated addresses (by RIPE or globally)?
The why of PI assignments is an ongoing discussion. There has been some discussion on the <pi-tf@ripe.net> list which was followed up on this list. The <pi-tf@ripe.net> list archives can be found at: http://www.ripe.net/ripe/mail-archives/pi-tf/ I prepared some statistics on PI assignments in a summary of the PI TF discussions. You can find them at: http://www.ripe.net/ripe/mail-archives/address-policy-wg/2003/msg00030.html I hope this is helpful for you. Best regards, -- leo vegoda RIPE NCC Registration Services Manager
Hi, On Fri, Oct 17, 2003 at 10:56:51AM +0200, Thomas.Levy@alcatel.fr wrote:
1) Usage of PI addresses is not recommended by RIPE. I don't want to raise a debate on this point. However, I would be interested in knowing the reasons for this. Is it for routing purpose?
One of the major disadvantages of PI space to achieve global internet connectivity is "impact on global routing". Especially for networks needing only fairly few addresses, using addresses from their ISP's PA network blocks means that their route can be aggregated into the ISP's PA route, so the individual network doesn't have an impact on all routers world-wide that carry the full IPv4 routing table. A PI network will always be visible as an individual route, with no way to aggregate it. Of course PI has advantages (it's much more convenient for the enterprise in question) and in some cases there is no way around PI (enterprise-local networks that are not connected to any ISP but need unique address space for VPN partner connections etc.). Gert Doering -- NetMaster -- Total number of prefixes smaller than registry allocations: 57785 (56883) SpaceNet AG Mail: netmaster@Space.Net Joseph-Dollinger-Bogen 14 Tel : +49-89-32356-0 80807 Muenchen Fax : +49-89-32356-299
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Gert Doering -
leo vegoda -
Thomas.Levy＠alcatel.fr