The measurements will be conducted by sending strings of DNS request
packets from each of four measuring locations to each of the Nameservers
and observing the responses from the Nameservers. (These strings
of requests and responses are referred to as a "CNNP Test".)
The measuring locations will be four root nameserver locations (on
the US East Coast, US West Coast, Asia, and Europe).
Each string of request packets will consist of 100 UDP packets at
10-second intervals requesting ns records for arbitrarily selected
second-level domains in the Sponsored TLD, preselected to ensure
that the names exist in the Sponsored TLD and are resolvable. The
packet loss (i.e. the percentage of response packets not received)
and the average Round-trip time for response packets received will
To meet the packet loss and Round-trip-time requirements for a particular
CNNP Test, all three of the following must be true:
The Round-trip time and packet loss from each measurement location
to at least one Nameserver must not exceed the required values.
The Round-trip time to each of 75% of the Nameservers from at
least one of the measurement locations must not exceed the required
The packet loss to each of the Nameservers from at least one of
the measurement locations must not exceed the required value.
Any failing CNNP Test result obtained during an identified Core
Internet Service Failure shall not be considered.
To ensure a properly diverse testing sample, ICANN will conduct
the CNNP Tests at varying times (i.e. at different times of day,
as well as on different days of the week). The cross-network Nameserver
performance requirement will be deemed to have not been met only
if the Nameservers persistently fail (see item
126.96.36.199 above) the CNNP Tests with no less than three consecutive
failed CNNP Tests to be considered to have persistently failed.
In the event of persistent failure of the CNNP Tests, ICANN will
give Sponsor written notice of the failures (with backup data) and
Sponsor will have sixty days to cure the failure.
If, following Sponsor's opportunity to cure in item
188.8.131.52 above, the Nameservers continue to persistently fail
CNNP Tests and Sponsor fails to resolve the problem within thirty
days after written notice of the continuing failures, Sponsor will
be in breach of its obligations under Subsection 3.4 of the Sponsorship
Sixty days before the commencement of testing under this provision,
ICANN will provide Sponsor with the opportunity to evaluate the
testing tools and procedures to be used by ICANN. In the event that
Sponsor does not approve of such tools and procedures, ICANN will
work directly with Sponsor to make necessary modifications.