nanog mailing list archives

Re: revised ACL 112 ?


From: "Michael P. Lucking" <michael () lucking com>
Date: Thu, 17 Jun 1999 23:34:04 -0500 (CDT)



It might be policy, but I don't believe it to be practice. I have no
problem reaching Verio from our /20 block. Oddly enough Verio (AS 2914) is
advertising several /20 netblocks out of 206/8. Even more specific they
are advertising as small as a /23 from 206/8. Further, they provide
transit for customers advertising /24s. It might be possible that someone
at Verio is not applying their policy, if one does indeed exist. 

Anyone from Verio care to comment?

On Thu, 17 Jun 1999, Mark Cobb wrote:

I believe that some agencies, such as Verio and Expedia are filtering out
anything longer than /19. In fact, I know that Verio is and they said that they
would not change this policy. ARIN changed the policy, but RIPE and APNIC have
not; this is their excuse for not changing their policies.


"Michael P. Lucking" wrote:

In February we received a new /20 CIDR from ARIN. I felt that we might be
caught by the filters at ISPs like Sprint (http://www.sprint.net/filter.htm).
I contacted Sprint twice and spoke to two different engineers, both told
me that they were not filtering as their page described, and they would
allow advertisements for /20 in 206/8 - 233/8. Since that time I have
spoken to several people who purchase transit from Sprint, and they do
indeed see my advertisements. Looking at NetFlow stats I can't find any
major provider that we have not had traffic flow between. I assume they
had to have accepted my advertisements, nobody runs BGP and default routes
:).

BTW: I also contacted, and received a similar response from ANS.


=========================================================================
Michael P. Lucking                                    Michael () Lucking COM




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