RE: How many ISPs are out there?
That wouldn't constitute a complete answer because there are MANY local ISPs that aggregate under a regional. Also, not all regionals (yes, I've found some exceptions <Qwest?>) use BGP either. Then there is the old route pre-fixing problem. Not many ISPs, smaller than /19, are going to be doing effective ASN's either.
From: bmanning@vacation.karoshi.com [mailto:bmanning@vacation.karoshi.com] Sent: Tuesday, July 24, 2001 2:21 AM
how many active ASN's are there?
I was actually thinking along IAP (Internet Access
Provider) lines. But,
most folks lump ISPs and IAPs in the same breath.
-----Original Message----- From: Adam Rothschild [mailto:asr@latency.net] Sent: Monday, July 23, 2001 11:09 PM To: Roeland Meyer Cc: nanog@merit.edu Subject: Re: How many ISPs are out there?
On Mon, Jul 23, 2001 at 10:37:01PM -0700, Roeland Meyer wrote:
Is there a site that can give me that info?
When in doubt, ask Jeeves:
<http://www.ask.com/main/askjeeves.asp?ask=How+many+ISPs+are+o ut+there%3F>
What exactly is an ISP anyways?
-a
On Tue, 24 Jul 2001, Roeland Meyer wrote:
some exceptions <Qwest?>) use BGP either. Then there is the old route pre-fixing problem. Not many ISPs, smaller than /19, are going to be doing effective ASN's either.
I would take issue with the assertion that you need a /19 or larger to "be doing effective ASNs". My understanding is that as long as you get a block from former class C or "the swamp", you should be visible everywhere. We recently requested, and got a /21 from 65/8 from Sprint. A phone call and some pleading got them to change that to 208.8.16.0/21 AFAIK, that's reachable everywhere from AS19975 If that's *not* correct, I'd sure like to know... James Smallacombe PlantageNet, Inc. CEO and Janitor up@3.am http://3.am =========================================================================
On Tue, 24 Jul 2001 10:40:50 EDT, up@3.am said:
My understanding is that as long as you get a block from former class C or "the swamp", you should be visible everywhere. We recently requested, and got a /21 from 65/8 from Sprint. A phone call and some pleading got them to change that to 208.8.16.0/21
Having a prefix that happens to be visible from everywhere is different than having a prefix that belongs to an ASN. Your mail was unclear as to whether your /21 was its own seperate ASN or not. I have to wonder why a phone call and pleading were needed to get it out of 65/8 - was your /21 being filtered or hidden in some way? -- Valdis Kletnieks Operating Systems Analyst Virginia Tech
On Tue, 24 Jul 2001 Valdis.Kletnieks@vt.edu wrote:
On Tue, 24 Jul 2001 10:40:50 EDT, up@3.am said:
My understanding is that as long as you get a block from former class C or "the swamp", you should be visible everywhere. We recently requested, and got a /21 from 65/8 from Sprint. A phone call and some pleading got them to change that to 208.8.16.0/21
Having a prefix that happens to be visible from everywhere is different than having a prefix that belongs to an ASN. Your mail was unclear as to whether your /21 was its own seperate ASN or not.
I didn't word that email well at all. 208.8.16.0/21 belongs to our AS19975
I have to wonder why a phone call and pleading were needed to get it out of 65/8 - was your /21 being filtered or hidden in some way?
I pleaded to get it changed from 65/8 to 208/8. I *assumed* that having a /21 from 65/8 would get us filtered by Verio (at least), but that a /21 from 208/8 should not be filtered anywhere. James Smallacombe PlantageNet, Inc. CEO and Janitor up@3.am http://3.am =========================================================================
up@3.am wrote:
I pleaded to get it changed from 65/8 to 208/8. I *assumed* that having a /21 from 65/8 would get us filtered by Verio (at least), but that a /21 from 208/8 should not be filtered anywhere.
Speaking from experience, /21 will get you filtered most places. You'd need a /20 or /19 at least.... You need to check around the lookingglasses for your actual results: http://www.traceroute.org/ -- William Allen Simpson Key fingerprint = 17 40 5E 67 15 6F 31 26 DD 0D B9 9B 6A 15 2C 32
On Tue, 24 Jul 2001, William Allen Simpson wrote:
up@3.am wrote:
I pleaded to get it changed from 65/8 to 208/8. I *assumed* that having a /21 from 65/8 would get us filtered by Verio (at least), but that a /21 from 208/8 should not be filtered anywhere.
Speaking from experience, /21 will get you filtered most places. You'd need a /20 or /19 at least....
Like I said, that depends on what part of the address space that is from. I have not seen that to be the case with 208.8.16.0/21
You need to check around the lookingglasses for your actual results: http://www.traceroute.org/
I have...every non-broken route server listed sees our announcement. Are you aware of any that do not? James Smallacombe PlantageNet, Inc. CEO and Janitor up@3.am http://3.am =========================================================================
On Tue, 24 Jul 2001 up@3.am wrote:
On Tue, 24 Jul 2001, William Allen Simpson wrote:
You need to check around the lookingglasses for your actual results: http://www.traceroute.org/
I have...every non-broken route server listed sees our announcement. Are you aware of any that do not?
For checking the distribution of your BGP advertisements, you should telnet to route-views.oregon-ix.net and check the routes to your net block. (If your block is part of a larger CIDR that Sprint is advertising, then traffic should get to you eventually.) For checking inbound routes to your own network, I humbly suggest that you try Traceloop. That's what it's designed for. Thanks, Steve Dashbit - The Leader In Internet Topology www.dashbit.com www.traceloop.com
participants (5)
-
Roeland Meyer -
Steve Schaefer -
up＠3.am -
Valdis.Kletnieks＠vt.edu -
William Allen Simpson