how many BGP routers, how many ASes

2009-05-13 Thread Irfan Zakiuddin 
Hi all,

I have scouted around for this information, but not get very far.  I'm
hoping someone will have answers at hand.

What I want to know is roughly how many :

1.  ASes there are in the world today?
2.  BGP routers there are, for intra-domain as well as inter-domain routing,
in total in the world?
3.  BGP routers do the largest ASes have?


Really interesting would then be to say either how fast the above numbers
are growing, or to give estimates for what the answers to 1-3 will be in 5
years time.

An Internet source that provides the above information would be most useful
- though I can't seem to find it with google.

I'd be grateful for answer to be sent to me directly, whether you also post
to NANOG is up to you.

thanks in advance.

irfan

Re: how many BGP routers, how many ASes

2009-05-13 Thread Ray Sanders 
Irfan, 

This is sent weekly to the list:



Routing Table Report   04:00 +10GMT Sat 09 May, 2009

Report Website: http://thyme.apnic.net
Detailed Analysis:  http://thyme.apnic.net/current/

Analysis Summary


BGP routing table entries examined:  288037
Prefixes after maximum aggregation:  136199
Deaggregation factor:  2.11
Unique aggregates announced to Internet: 140785
Total ASes present in the Internet Routing Table: 31199
Prefixes per ASN:  9.23
Origin-only ASes present in the Internet Routing Table:   27142
Origin ASes announcing only one prefix:   13239
Transit ASes present in the Internet Routing Table:4057
Transit-only ASes present in the Internet Routing Table: 96
Average AS path length visible in the Internet Routing Table:   3.6
Max AS path length visible:  33
Max AS path prepend of ASN (43683)   31
Prefixes from unregistered ASNs in the Routing Table:   461
Unregistered ASNs in the Routing Table: 151
Number of 32-bit ASNs allocated by the RIRs:142
Prefixes from 32-bit ASNs in the Routing Table:  30
Special use prefixes present in the Routing Table:0
Prefixes being announced from unallocated address space:194
Number of addresses announced to Internet:   2039977920
Equivalent to 121 /8s, 151 /16s and 151 /24s
Percentage of available address space announced:   55.0
Percentage of allocated address space announced:   63.7
Percentage of available address space allocated:   86.4
Percentage of address space in use by end-sites:   76.9
Total number of prefixes smaller than registry allocations:  142407




On Wed, 2009-05-13 at 16:53 +0100, Irfan Zakiuddin wrote:
 Hi all,
 
 I have scouted around for this information, but not get very far.  I'm
 hoping someone will have answers at hand.
 
 What I want to know is roughly how many :
 
 1.  ASes there are in the world today?
 2.  BGP routers there are, for intra-domain as well as inter-domain routing,
 in total in the world?
 3.  BGP routers do the largest ASes have?
 
 
 Really interesting would then be to say either how fast the above numbers
 are growing, or to give estimates for what the answers to 1-3 will be in 5
 years time.
 
 An Internet source that provides the above information would be most useful
 - though I can't seem to find it with google.
 
 I'd be grateful for answer to be sent to me directly, whether you also post
 to NANOG is up to you.
 
 thanks in advance.
 
 irfan
-- 
Prediction is very difficult, especially about the future. Niels Bohr
--
Ray Sanders
Linux Administrator
Village Voice Media
Office: 602-744-6547
Cell: 602-300-4344

Re: how many BGP routers, how many ASes

2009-05-13 Thread Ricardo Oliveira 

you might want to have a look at:
http://irl.cs.ucla.edu/topology

--Ricardo   

On May 13, 2009, at 8:53 AM, Irfan Zakiuddin wrote:


Hi all,

I have scouted around for this information, but not get very far.  I'm
hoping someone will have answers at hand.

What I want to know is roughly how many :

1.  ASes there are in the world today?
2.  BGP routers there are, for intra-domain as well as inter-domain  
routing,

in total in the world?
3.  BGP routers do the largest ASes have?


Really interesting would then be to say either how fast the above  
numbers
are growing, or to give estimates for what the answers to 1-3 will  
be in 5

years time.

An Internet source that provides the above information would be most  
useful

- though I can't seem to find it with google.

I'd be grateful for answer to be sent to me directly, whether you  
also post

to NANOG is up to you.

thanks in advance.

irfan

Re: how many BGP routers, how many ASes

2009-05-13 Thread Nathan Ward 

On 14/05/2009, at 5:46 AM, William Herrin wrote:


Figure every AS must have at least one BGP router, the vast majority
will have at least two, many will have more than two, and at least
some will have more than 100. Figure also that there are fewer BGP
routers in use than there are prefixes in the table. Gives you a lower
bound of around 70k and an upper bound around 290k.



How are you certain that there are fewer BGP routers than prefixes?

At all my previous employers we have had more routers than prefixes we  
advertised to the global table (which is where you get your 290k  
number).


--
Nathan Ward