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
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