Can I recommend the following web site to the list?
Lots of interesting stats about route announcements on the core of the
net in particular those which are less than optimal.
I'd suggest that all of us here who announce prefixes by BGP should at
least go the the section at the very bottom of the page and generate the
report for the AS numbers we're responsible for and take some action on
the output if necessary.
For example, Citylink's office network uses AS23754 and the report shows
will give a
better formatted view)
Rank AS Type Originate Addr Space (pfx) Transit Addr space
8920 AS23754 ORIGIN Originate: 2560 /20.68 Transit: 0
/0.00 CITYLINK-AS-NZ Citylink
This report does not take into account conditions local to each
origin AS in terms of policy or traffic engineering requirements, so
this is an approximate guideline as to aggregation possibilities.
Rank AS AS Name Current Wthdw
Aggte Annce Redctn %
12949 AS23754 CITYLINK-AS-NZ Citylink 4 0
0 4 0 0.00%
AS23754: CITYLINK-AS-NZ Citylink
Prefix (AS Path) Aggregation Action
220.127.116.11/22 1221 2764 3643 7657 23754
18.104.22.168/22 1221 2764 3643 7657 23754
22.214.171.124/24 1221 2764 3643 7657 23754
126.96.36.199/24 1221 2764 3643 7657 23754
Advertisements that are fragments of the original RIR allocation
(more specifics) originated by this AS.
AS23754 1 More Specifics 4 Total Advertisements CITYLINK-AS-NZ
So it looks like I need to check with IHUG, our upstream, and see why
they're announcing our particular subnet of 188.8.131.52/18 as well as
I've just come back from APRICOT where I saw a presentation that
indicated that if we all were to get this sort of thing sorted out we'd
reduce the size of the global routing table by 30%
Let's get the NZ annoucements sorted at least!