	AS1221 IPv6 BGP Table Data
	BGP data obtained from AS1221. Report last updated at Mon Jun 25 09:45:30 2007 (Australian Eastern Time).		Other BGP Metrics

Active BGP entries (FIB)

Table Size Metrics

The trend of the size of the BGP Forwarding Table (FIB) and the underlying BGP Routing Table (RIB). The RIB/FIB ratio is a function of the number of BGP peering sessions at the sample point. Some RIB entries are marked as unusable as an outcome of protocol operation, and these categories of unusable advertisements are tracked.

FIB / RIB Table Reports (plots)	Data Sets(txt)
Active BGP entries (FIB)	858	Change in FIB Size	0	Change (%)	0.000
All BGP entries (RIB)	4842
RIB/FIB ratio (4842/858)	5.6434
Valid entries	4842
Suppressed RIB entries	0
Damped entries	0
History entries	0

Address Span Metrics

The total span of address space advertised in the BGP table, and the relationship of this value to the number and size of address prefix objects in the table.

Address Space Reports (plots)	Data Sets(txt)
Total address space advertised (/64 equiv)	158937416204288
Total address space advertised (prefix)	16.8245
Percentage of IPv6 space advertised (158937416204288/18446744073709551615)	0.000862
Average address span	185241743828
Average address span (as prefix size)	26.5694
Average prefix length	34.8438

More Specifics

The characteristics of more specific advertisements - where an advertisement is associated with a sub-span of address space of another advertisement. The metrics also look at the degree of similarity of the AS paths of the specific advertisements to the encompassing aggregate.

More-Specific Advertisement Reports (plots)	Data Sets(txt)	Percentage Reports (plots)	Data Sets(txt)
Entries advertising more specific prefixes of aggregates	136	Specifics as % of FIB entries (136/858)	15.8508
Specifics as % of address span (43644620800/158937416204288)	0.0275
Specifics where AS prepended Path matches aggregate	28	AS-P_Path-Match % (28/136)	20.59
AS Path matches aggregate	28	AS-Path-Match % (28/136)	20.5882
AS Origin matches aggregate	49	AS-Origin-Match % (49/136)	36.0294
Root Prefixes	722
Root Prefix Tree Depth	(data)
Root Prefixes with depth 0	719
Root Prefixes with depth 1	2
Root Prefixes with depth 2	1

AS Numbers

The time trend of the number of unique AS numbers advertised within the BGP table. The associated metrics characterise AS's into origin only, transit only, or mixed (origin and transit), and also look at the trends of advertised address space as related to the number of ASes.

AS Reports (plots)	Data Sets(txt)	Additional Reports (plots)	Data Sets(txt)
Unique ASes	739	ASes visible in only one AS path	558
Origin only ASes	546	Origin ASs announced via a single AS path	546
Transit only ASes	26	Originating AS ATOM count	713
Mixed ASes	167	Originating AS ATOM compression	0.8310
Multi-Origin Prefixes	5
ASes originating a single prefix	623
Average entries per origin AS	1.2034	Maximum entries for an origin AS (AS30071)	22
Average address range span for an origin AS	222913627214.9902
Maximum address range for an origin AS (AS5511)	35188667056128
Maximum address range (prefix length) for an origin AS (AS5511)	19.00
Average address range span for an origin AS (pfx length)	26.3023

AS Paths

The time trend of the number of unique AS Paths advertised within the BGP table. The associated metrics look at trends of average path length, and BGP table entries per path.

AS Reports (plots)	Data Sets(txt)	Additional Reports (plots)	Data Sets(txt)
Unique AS Paths	2944	Unique AS prepended Paths	2945
AS Paths used in FIB	737	AS Paths using prepending	110
AS paths associated with a single FIB entry	666	AS Paths using private ASs	1
Average AS path length	4.7821	Maximum AS Path length	13
Average address weighted AS path length	3.4634	Maximum prepended AS Path length	13
Average entries per AS Path	0.2914	Average entries per FIB AS Path	1.1642
AS Paths per origin AS	4.1290	FIB AS Paths per origin AS	1.0337
AS PATH ATOM compression	0.8590

Prefix Length Distributions

The time trend of the distribution of BGP Table entries by address prefix length.

Prefix Length Reports (plots)	Data Sets(txt)	Percentage Reports (plots)	Data Sets(txt)
Prefix Count	(data)	% Prefix distribution	(data)
Prefix count /19	2	% Prefix /19	0.23
Prefix count /20	3	% Prefix /20	0.35
Prefix count /21	3	% Prefix /21	0.35
Prefix count /22	1	% Prefix /22	0.12
Prefix count /24	1	% Prefix /24	0.12
Prefix count /26	2	% Prefix /26	0.23
Prefix count /27	2	% Prefix /27	0.23
Prefix count /28	5	% Prefix /28	0.58
Prefix count /29	1	% Prefix /29	0.12
Prefix count /30	2	% Prefix /30	0.23
Prefix count /31	1	% Prefix /31	0.12
Prefix count /32	621	% Prefix /32	72.38
Prefix count /33	8	% Prefix /33	0.93
Prefix count /34	3	% Prefix /34	0.35
Prefix count /35	30	% Prefix /35	3.50
Prefix count /36	1	% Prefix /36	0.12
Prefix count /39	1	% Prefix /39	0.12
Prefix count /40	20	% Prefix /40	2.33
Prefix count /42	11	% Prefix /42	1.28
Prefix count /43	1	% Prefix /43	0.12
Prefix count /44	3	% Prefix /44	0.35
Prefix count /45	2	% Prefix /45	0.23
Prefix count /47	3	% Prefix /47	0.35
Prefix count /48	130	% Prefix /48	15.15
Prefix count /52	1	% Prefix /52	0.12

Root Prefix Length Distributions

The time trend of the distribution of Root BGP Table entries by address prefix length.

Root Prefix Length Reports (plots)	Data Sets(txt)	Percentage Reports (plots)	Data Sets(txt)
Root Prefix Count	(data)	% Prefix distribution	(data)
Prefix count /19	2	% Prefix /19	0.31
Prefix count /20	3	% Prefix /20	0.47
Prefix count /21	3	% Prefix /21	0.47
Prefix count /22	1	% Prefix /22	0.16
Prefix count /24	1	% Prefix /24	0.16
Prefix count /26	2	% Prefix /26	0.31
Prefix count /27	2	% Prefix /27	0.31
Prefix count /28	5	% Prefix /28	0.78
Prefix count /29	1	% Prefix /29	0.16
Prefix count /30	2	% Prefix /30	0.31
Prefix count /32	617	% Prefix /32	96.56
Prefix count /33	4	% Prefix /33	0.00
Prefix count /34	1	% Prefix /34	0.00
Prefix count /35	18	% Prefix /35	0.00
Prefix count /48	60	% Prefix /48	0.00

AS Diameter Reports

The time trend of the reacahbility of addresses and AS's using AS distance from the sample point to the origin AS as the diameter metric.

AS Diameter Reports (plots)	Data Sets(txt)	Percentage Reports (plots)	Data Sets(txt)
Addresses by AS distance	(data)	Address percentage by AS distance	(data)
Addresses at AS distance 0	17596481011712	% Addresses at AS distance 0	11
Addresses at AS distance 1	14126678016	% Addresses at AS distance 1	0
Addresses at AS distance 2	35606438547456	% Addresses at AS distance 2	22
Addresses at AS distance 3	104170437017600	% Addresses at AS distance 3	65
Addresses at AS distance 4	941708541952	% Addresses at AS distance 4	0
Addresses at AS distance 5	358665158656	% Addresses at AS distance 5	0
Addresses at AS distance 6	99912843264	% Addresses at AS distance 6	0
Addresses at AS distance 7	40802189312	% Addresses at AS distance 7	0
Addresses at AS distance 8	97727610880	% Addresses at AS distance 8	0
Addresses at AS distance 9	42949869568	% Addresses at AS distance 9	0
Addresses at AS distance 10	5368840192	% Addresses at AS distance 10	0
Addresses at AS distance 11	4295032832	% Addresses at AS distance 11	0
Addresses at AS distance 12	2147483648	% Addresses at AS distance 12	0

Cumulative Address by AS distance	(data)	Cumulative % Address by AS distance	(data)
Addresses reachable within 0 AS hops	17596481011712	% Addresses reachable within 0 AS hops	11
Addresses reachable within 1 AS hops	17610607689728	% Addresses reachable within 1 AS hops	11
Addresses reachable within 2 AS hops	53217046237184	% Addresses reachable within 2 AS hops	33
Addresses reachable within 3 AS hops	157387483254784	% Addresses reachable within 3 AS hops	98
Addresses reachable within 4 AS hops	158329191796736	% Addresses reachable within 4 AS hops	99
Addresses reachable within 5 AS hops	158687856955392	% Addresses reachable within 5 AS hops	99
Addresses reachable within 6 AS hops	158787769798656	% Addresses reachable within 6 AS hops	99
Addresses reachable within 7 AS hops	158828571987968	% Addresses reachable within 7 AS hops	99
Addresses reachable within 8 AS hops	158926299598848	% Addresses reachable within 8 AS hops	99
Addresses reachable within 9 AS hops	158969249468416	% Addresses reachable within 9 AS hops	99
Addresses reachable within 10 AS hops	158974618308608	% Addresses reachable within 10 AS hops	99
Addresses reachable within 11 AS hops	158978913341440	% Addresses reachable within 11 AS hops	99
Addresses reachable within 12 AS hops	158981060825088	% Addresses reachable within 12 AS hops	100

ASes by AS distance	(data)	% ASes by AS hops	(data)
ASes reachable at 0 AS hops	1	% ASes reachable at 0 AS hops	0
ASes reachable at 1 AS hops	7	% ASes reachable at 1 AS hops	0
ASes reachable at 2 AS hops	160	% ASes reachable at 2 AS hops	21
ASes reachable at 3 AS hops	360	% ASes reachable at 3 AS hops	48
ASes reachable at 4 AS hops	132	% ASes reachable at 4 AS hops	17
ASes reachable at 5 AS hops	38	% ASes reachable at 5 AS hops	5
ASes reachable at 6 AS hops	21	% ASes reachable at 6 AS hops	2
ASes reachable at 7 AS hops	7	% ASes reachable at 7 AS hops	0
ASes reachable at 8 AS hops	8	% ASes reachable at 8 AS hops	1
ASes reachable at 9 AS hops	3	% ASes reachable at 9 AS hops	0
ASes reachable at 10 AS hops	1	% ASes reachable at 10 AS hops	0
ASes reachable at 11 AS hops	1	% ASes reachable at 11 AS hops	0
ASes reachable at 12 AS hops	0	% ASes reachable at 12 AS hops	0

Cumulative ASes by AS hops	(data)	Cumulative % ASes by AS hops	(data)
ASes reachable by 0 AS hops	1	Cumulative % ASes by AS hops 0	0
ASes reachable by 1 AS hops	8	Cumulative % ASes by AS hops 1	1
ASes reachable by 2 AS hops	168	Cumulative % ASes by AS hops 2	22
ASes reachable by 3 AS hops	528	Cumulative % ASes by AS hops 3	71
ASes reachable by 4 AS hops	660	Cumulative % ASes by AS hops 4	89
ASes reachable by 5 AS hops	698	Cumulative % ASes by AS hops 5	94
ASes reachable by 6 AS hops	719	Cumulative % ASes by AS hops 6	97
ASes reachable by 7 AS hops	726	Cumulative % ASes by AS hops 7	98
ASes reachable by 8 AS hops	734	Cumulative % ASes by AS hops 8	99
ASes reachable by 9 AS hops	737	Cumulative % ASes by AS hops 9	99
ASes reachable by 10 AS hops	738	Cumulative % ASes by AS hops 10	99
ASes reachable by 11 AS hops	739	Cumulative % ASes by AS hops 11	100
ASes reachable by 12 AS hops	739	Cumulative % ASes by AS hops 12	100

BGP Update Reports

Compares the current BGP Table with the previous table and reports on the number of changes in the FIB. These changes are further categorised into announcements, withdrawls and path changes, and further categorised by prefix length.

FIB Update Reports	Data	Announce	Data	Withdraw	Data	Path Chg	Data
Table Updates	4691	New Entries	356	Removed Entries	3941	Updated Entries	394
		Report		Report		Report
Address Span	2142405499	Address Span	0	Address Span	2872777855	Address Span	3564594940
Average address span per update	456705	Avg Span	0	Avg Span	728946	Avg Span	9047195
Average prefix size updated	41.52	Average prefix size	129.00	Average prefix size	34.32	Average prefix size	34.53
Per-Prefix updates	(data)	Prefix announcements	(data)	Prefix withdrawals	(data)	Prefix path updates	(data)
Prefix /16 total	5	Prefix /16 announcements	0	Prefix /16 withdrawals	5	Prefix /16 path updates	0
Prefix /19 total	10	Prefix /19 announcements	0	Prefix /19 withdrawals	8	Prefix /19 path updates	2
Prefix /20 total	9	Prefix /20 announcements	0	Prefix /20 withdrawals	8	Prefix /20 path updates	1
Prefix /21 total	16	Prefix /21 announcements	0	Prefix /21 withdrawals	14	Prefix /21 path updates	2
Prefix /22 total	6	Prefix /22 announcements	0	Prefix /22 withdrawals	5	Prefix /22 path updates	1
Prefix /24 total	6	Prefix /24 announcements	0	Prefix /24 withdrawals	5	Prefix /24 path updates	1
Prefix /26 total	14	Prefix /26 announcements	0	Prefix /26 withdrawals	12	Prefix /26 path updates	2
Prefix /27 total	12	Prefix /27 announcements	0	Prefix /27 withdrawals	10	Prefix /27 path updates	2
Prefix /28 total	27	Prefix /28 announcements	0	Prefix /28 withdrawals	26	Prefix /28 path updates	1
Prefix /29 total	5	Prefix /29 announcements	0	Prefix /29 withdrawals	5	Prefix /29 path updates	0
Prefix /30 total	12	Prefix /30 announcements	0	Prefix /30 withdrawals	10	Prefix /30 path updates	2
Prefix /31 total	5	Prefix /31 announcements	0	Prefix /31 withdrawals	5	Prefix /31 path updates	0
Prefix /32 total	3377	Prefix /32 announcements	0	Prefix /32 withdrawals	3085	Prefix /32 path updates	292
Prefix /33 total	40	Prefix /33 announcements	0	Prefix /33 withdrawals	34	Prefix /33 path updates	6
Prefix /34 total	15	Prefix /34 announcements	0	Prefix /34 withdrawals	13	Prefix /34 path updates	2
Prefix /35 total	154	Prefix /35 announcements	0	Prefix /35 withdrawals	144	Prefix /35 path updates	10
Prefix /36 total	6	Prefix /36 announcements	0	Prefix /36 withdrawals	5	Prefix /36 path updates	1
Prefix /39 total	1	Prefix /39 announcements	0	Prefix /39 withdrawals	1	Prefix /39 path updates	0
Prefix /40 total	24	Prefix /40 announcements	0	Prefix /40 withdrawals	20	Prefix /40 path updates	4
Prefix /42 total	10	Prefix /42 announcements	0

AS1221 IPv6 BGP Table Data