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Re: [dnsop] Re: Root Anycast (fwd)

2004-10-01 12:29:15

On Fri, 1 Oct 2004, Iljitsch van Beijnum wrote:

On 1-okt-04, at 2:48, Dean Anderson wrote:

Note though that it's *very* hard to create a setup where packets are
delivered to different multicast instances, as it's hard to imagine 
how
any real-world anycast setup could match the criteria in

Its quite easy for anycast: (real names used, but not real 
relationships)

                Av8
              /   \
          sprint   att
              \   /
              F-root

If Av8 turns on PPLB, traffic to F-root will go through both sprint and
att on a per-packet basis.

No, that won't happen because in order for BGP to install multiple 
paths in the routing table, the following conditions must be met:

If you use bgp multipath only, that is true. If you turn on PPLB, as 
described in my URL, then that isn't true.


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