To:
Patrik Fältström <paf@cisco.com>
Cc:
dnsop@cafax.se
From:
Randy Bush <randy@psg.com>
Date:
Mon, 04 Nov 2002 07:28:00 -0800
Sender:
owner-dnsop@cafax.se
Subject:
Re: DoS and anycast
>>> When _people_ see problems with data from one IP-address, they call >>> whatever party is responsible for that IP address. >> no, they call their isp. the vast majority of them wouldn't know >> an ip address if it bit them on the butt. > Who do people at the ISP call? when it is a dns problem, their dns folk. do remember that this happens today and has been happening for many years. isps have been using anycast dns for many years. > Say I buy IP from ISP A, which in turn buy transit from B which > buys transit from C. If C internally have an anycast copy of IP > address 1.2.3.4, and I send a packet to that address, will the > packet go to the copy of the 1.2.3.4 address at ISP C, or to ISP > D where the "original" is, the one which is mentioned in whois? first, this is the same problem as any transitive service. second, as many of us have repeatedly said, routing of anycast addresses has to be appropriately scoped, as it has to be today. it would be useful to have a discussion of 'appropriately' if we could stop ratholing on other issues. randy #---------------------------------------------------------------------- # To unsubscribe, send a message to <dnsop-request@cafax.se>.