Re: Where's 209.240.157.34 ?
John R Levine wrote
Where's 209.240.157.34 ?
Got a spam advertising a web page there, ARIN claims it's not allocated although all the space around it is. It routes through Tierranet.
TierraNet (ASN 10732) is advertising 209.240.128.0/19, which includes 209.240.157.34 (ns1.netcolony.com). ARIN reports that they've only been allocated 209.240.128.0/20 and that the other half of the /19 that they're announcing (209.240.144.0/20) is unallocated. Perhaps ARIN has reserved the entire /19 for TierraNet, but only actually allocated the lower /20 to them? Perhaps TierraNet is announcing their /20 as a /19 to get past Sprint's route filters? -Richard
Richard Parker wrote:
Perhaps ARIN has reserved the entire /19 for TierraNet, but only actually allocated the lower /20 to them? Perhaps TierraNet is announcing their /20 as a /19 to get past Sprint's route filters?
That is what ARIN has been doing. Those who qualify for /20 can get a /20 where they can eventually get a /19 so that they can announce as /19 to bypass Sprint's discrimination against small businesses. -- -- *-----------------------------* Phil Howard KA9WGN * -- -- | Inturnet, Inc. | Director of Internet Services | -- -- | Business Internet Solutions | eng at intur.net | -- -- *-----------------------------* philh at intur.net * --
Richard Parker wrote:
Perhaps ARIN has reserved the entire /19 for TierraNet, but only actually allocated the lower /20 to them? Perhaps TierraNet is announcing their /20 as a /19 to get past Sprint's route filters?
That is what ARIN has been doing. Those who qualify for /20 can get a /20 where they can eventually get a /19 so that they can announce as /19 to bypass Sprint's discrimination against small businesses.
ARIN implemented a policy in February (based on a recommendation from the Advisory Council) for multihomed organizations. Basically, if you are multihomed and you meet the following criteria: - efficiently utilized a /21 - can justify more address space - agree to return the /21 to whatever organization you received it from within 18 months than you may be issued a /20 from a reserved /19 from ARIN. The idea is that you may announce the full /19 but you cannot use any of the second /20 until you go back to ARIN and justify it. - Kim Hubbard ARIN
-- -- *-----------------------------* Phil Howard KA9WGN * -- -- | Inturnet, Inc. | Director of Internet Services | -- -- | Business Internet Solutions | eng at intur.net | -- -- *-----------------------------* philh at intur.net * --
participants (3)
-
Kim Hubbard -
Phil Howard -
Richard Parker