2008/10/29 Marco Hogewoning <marcoh@marcoh.net>:
On Oct 29, 2008, at 9:10 AM, Stephane Bortzmeyer wrote:
On Tue, Oct 28, 2008 at 11:48:06AM +0100, Ond??ej Surý <ondrej.sury@nic.cz> wrote a message of 9 lines which said:
We would like to see policy for IPv4 and IPv6 modifiedto allow /24 *minimum* for IPv4 and /48 *minimum* togTLD/ccTLD. First reason behind this is that one PI is not reallyenough and it's blocking us to deploy more DNS serversand make our TLD service more reliable.
As a TLD, I agree. ".fr" has currently two anycast nodes (managed outside, so they do not use "our" addresses) and plan to add more and to manage them ourselves. We will therefore need more than one PI prefix.
Maybe I understand, maybe I don't...but isn't the whole idea of anycast that you create redundancy by adding more machines/locations in the same address space ? So what exactly are you trying to gain by adding multiple anycast blocks, that's not exactly clear with me.
We discussed this face to face, but just for the record. Idea of having multiple PI anycast clouds is to have: M servers in N anycast clouds and L locations and each anycast cloud includes K servers, where L >= N, M >= L and K << M Picture would be better here :(. Very simple example in plain words: each anycast cloud will have 3 servers placed in 3 different location, and each two anycast clouds can share no more then 2 locations with another anycast cloud. Each location cannot hold more then two anycast clouds. Anycast clouds: A1 A2 A3 A4 Locations: L1 L2 L3 L4 L5 L6 A1(L1 L2 L3) A2(L1 L4 L5) A3(L2 L4 L6) A4(L3 L5 L6) That way any two locations can fail without failure of any anycast node. Ondrej. -- Ondřej Surý technický ředitel/Chief Technical Officer ----------------------------------------- CZ.NIC, z.s.p.o. -- .cz domain registry Americká 23,120 00 Praha 2,Czech Republic mailto:ondrej.sury@nic.cz http://nic.cz/ sip:ondrej.sury@nic.cz tel:+420.222745110 mob:+420.739013699 fax:+420.222745112 -----------------------------------------