Lame Delegations

[bmanning at vacation.karoshi.com]

 find this uncomfortable for a couple of reasons:

	there are known problems with threading on some platforms
	which will exihibit this type of behaviour (which is why
	ther eis a "no-threads" option available in BIND but it
	is not the default).
	
	you get thsi behaviour with a mismatch between one-answer and
	many-answers.

	the Internet is increasingly abandoning the e2e model. what 
	presumptions are you making that your monitoring machine will
	not be blocked by firewalls or that the prefix will even be
	carried to everywhere on the net? (this is the in-addr.arpa
	zone your are talking about, not just the data in the arin region)

	the stated purpose is to reduce stress on the servers and traffic
	overall. it would be useful to validate the assumption that 
	there is stress and excess traffic. Can we see real numbers
	regarding query rates and what percentage of queries are
	these "requeries"

	More later.

> 
> Please comment on the following:
> 
> ARIN would like to remove lame delegations the IN-ADDR.ARPA zone file
> after 7 consecutive days during which queries return an invalid  response
> for more than 50% of the network.
> 
> PURPOSE: As the zone files continue to grow, additional queries put
> additional stress and strain on the servers, as well as generating
> additional Internet traffic.  These "requeries" are fully defined in
> the Internet Draft <draft-ietf-dnsop-bad-dns-res-00.txt>.
> 
> PROCEDURE:
> 1. ARIN will have a designated machine to query all name servers listed in
>    the database for all networks.  This will include name servers that are
>    considered to be lame and/or invalid.  Logs will be generated and 
>    retained for 30 days.  
> 2. The database will keep track of when and how long name servers are 
>    lame.
> 3. Any name server that is lame for more than 7 days will be excluded from
>    the zone files.
> 4. On the 7th consecutive day a name server is lame, an email will be sent
>    to the network POC(s), stating the name server will not be included in
>    the zone file.  Since this is a courtesy email, those returned 
>    undeliverable will be ignored.
> 5. Any name server that is lame for more than 7 days, will be marked
>    "LAME" in the network Whois display.
> 6. Lame delegations will be removed from the database after 180 days
>    during which queries return an invalid response for more than 50% of
>    the network.
> 
> 
> Ginny Listman
> Director of Engineering
> ARIN
>