Greetings,
On Fri, 16 Mar 2012, Bjorn Pehrson wrote:
(Please trim inclusions from previous messages)
_______________________________________________
I admit it was a few years ago, around the turn of the millennium, so that
things might have changed, but I had to change an experimental network due to
the fact that the US Navy had a border router that was not CIDR capable.
Memory these days is so cheap so most border routers can hold the entire
routing table, even open source PC-routers.
But anyway, as we seem to agree, it is probably wise avoiding anything less
than /24
It will be like pulling hens teeth to get a BGP announcement accepted
for anything less that /24. Many networks still will not allow anything
less than /19, so networks need to aggregated. The routing table is
MIGHTY big folks! There are now over 401,129 networks being announced
through 40,373 ASN's. We will just be adding to the noise floor...
Analysis Summary
----------------
BGP routing table entries examined: 401129
Prefixes after maximum aggregation: 170803
Deaggregation factor: 2.35
Unique aggregates announced to Internet: 194695
Total ASes present in the Internet Routing Table: 40373
Prefixes per ASN: 9.94
Origin-only ASes present in the Internet Routing Table: 32891
Origin ASes announcing only one prefix: 15486
Transit ASes present in the Internet Routing Table: 5406
Transit-only ASes present in the Internet Routing Table: 141
Average AS path length visible in the Internet Routing Table: 4.4
Max AS path length visible: 33
Max AS path prepend of ASN (48687) 24
Prefixes from unregistered ASNs in the Routing Table: 407
Unregistered ASNs in the Routing Table: 187
Number of 32-bit ASNs allocated by the RIRs: 2322
Number of 32-bit ASNs visible in the Routing Table: 2076
Prefixes from 32-bit ASNs in the Routing Table: 5015
Special use prefixes present in the Routing Table: 2
Prefixes being announced from unallocated address space: 687
Number of addresses announced to Internet: 2526912912
Equivalent to 150 /8s, 157 /16s and 161 /24s
Percentage of available address space announced: 68.2
Percentage of allocated address space announced: 68.2
Percentage of available address space allocated: 100.0
Percentage of address space in use by end-sites: 92.1
Total number of prefixes smaller than registry allocations: 170384
--- Jay Nugent WB8TKL
() ascii ribbon campaign in
/\ support of plain text e-mail
+------------------------------------------------------------------------+
| Jay Nugent jjn(a)nuge.com (734)484-5105 (734)649-0850/Cell |
| Nugent Telecommunications [
www.nuge.com] |
| Internet Consulting/Linux SysAdmin/Engineering & Design/ISP Reseller |
| ISP Monitoring [
www.ispmonitor.org] ISP & Modem Performance Monitoring |
| Web-Pegasus [
www.webpegasus.com] Web Hosting/DNS Hosting/Shell Accts|
+------------------------------------------------------------------------+
15:01:01 up 193 days, 20:39, 3 users, load average: 0.02, 0.05, 0.34