Re: [dnsop] ccTLD delegation analysis

[Doug Barton]

Mark Foster wrote:

OK. However this approach ignores the real-world observations that lame 
delegations produce an inordinate load on the parent name servers,
apparently due to broken resolver implementation(s).
 
I have seen this happen a number of times. The resulting query loop
has comprised up to 80% of the parent server query traffic.
There is a serious problem with one very popular vendor's resolving name 
server implementation wherein if _all_ the name servers in the parent's 
delegation are lame, it will enter a loop. If even one of the name 
servers in the delegation respond, the loop is broken.

Doug

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