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
. dnsop resources:_____________________________________________________ web user interface: http://darkwing.uoregon.edu/~llynch/dnsop.html mhonarc archive: http://darkwing.uoregon.edu/~llynch/dnsop/index.html
