Lame Delegations

[Rick Robino]

Ginny,

The draft never mentions which implementations exhibit the "unreasonable
verification queries" noted in section 2.1.  It also does not mention
which "widely distributed name server implementation", nor was the
investigation able discern which stub resolvers or client applications
were choking on SERVFAIL, the other two major load factors described.

This begs the question: which particular implementations (client
and/or server) are now known to have problems?

I think this is is feasible that changing some of the most common
implementations may have such a dramatic effect on mitigating load
that managing lame servers from the top may not be necessary (yet
lame servers will be no less annoying to the rest of us).

Truthfully, I'd also like to know if there are any vendors or
implementations who are being unduly spared critical feedback.

Cheers,

Rick Robino

> On Tue, Jan 15, 2002 at 12:15:34PM -0500, ginny listman wrote:
> 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

-- 

Rick Robino                                          v. (503) 891-9283
Internet Systems Architect                           f. (503) 439-8946
Wave Division Consulting                             @. wavedivision.com