AS131072 IPv6 BGP Table Data

BGP data obtained from AS131072.
Report last updated at Mon Mar 31 09:45:04 2025 (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) 221062 Change in FIB Size 531 Change (%) 0.240
All BGP entries (RIB) 852389
RIB/FIB ratio (852389/221062) 3.8559
Valid entries 852389

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) 683968362579489
Total address space advertised (prefix) 14.7191
Percentage of IPv6 space advertised (683968362579489/18446744073709551615) 0.003708
Average address span 3094011465
Average address span (as prefix size) 32.4732
Average prefix length 42.8623

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 126322 Specifics as % of FIB entries (126322/221062) 57.1432
Specifics as % of address span (40718390490348/683968362579489) 5.9533
Specifics where AS prepended Path matches aggregate 61245 AS-P_Path-Match % (61245/126322) 48.48
AS Path matches aggregate 66078 AS-Path-Match % (66078/126322) 52.3092
AS Origin matches aggregate 96779 AS-Origin-Match % (96779/126322) 76.6129
Root Prefixes 94740
Root Prefix Tree Depth (data)
Root Prefixes with depth 0 93118
Root Prefixes with depth 1 1306
Root Prefixes with depth 2 239
Root Prefixes with depth 3 59
Root Prefixes with depth 4 13
Root Prefixes with depth 5 4
Root Prefixes with depth 6 0
Root Prefixes with depth 7 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 34722 ASes visible in only one AS path 25102
Origin only ASes 28821 Origin ASs announced via a single AS path 24725
Transit only ASes 354 Originating AS ATOM count 34368
Mixed ASes 5547 Originating AS ATOM compression 0.1555
Multi-Origin Prefixes 863
ASes originating a single prefix 21374
Average entries per origin AS 6.4322 Maximum entries for an origin AS (AS9808) 5827
Average address range span for an origin AS 19901314088.0903 Maximum address range (prefix length) for an origin AS (AS7922) 18.95
Average address range span for an origin AS (pfx length) 29.7879

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 133636 Unique AS prepended Paths 137057
AS Paths used in FIB 45696 AS Paths using prepending 20096
AS paths associated with a single FIB entry 30366 AS Paths using private ASs 20
Average AS path length 4.8837 Maximum AS Path length 26
Average address weighted AS path length 4.8851 Maximum prepended AS Path length 36
Average entries per AS Path 1.6542 Average entries per FIB AS Path 4.8377
AS Paths per origin AS 3.8884 FIB AS Paths per origin AS 1.3296
AS PATH ATOM compression 0.2067

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 1 % Prefix /19 0.00
Prefix count /20 13 % Prefix /20 0.01
Prefix count /21 3 % Prefix /21 0.00
Prefix count /22 6 % Prefix /22 0.00
Prefix count /23 6 % Prefix /23 0.00
Prefix count /24 36 % Prefix /24 0.02
Prefix count /25 11 % Prefix /25 0.00
Prefix count /26 20 % Prefix /26 0.01
Prefix count /27 20 % Prefix /27 0.01
Prefix count /28 155 % Prefix /28 0.07
Prefix count /29 5405 % Prefix /29 2.45
Prefix count /30 737 % Prefix /30 0.33
Prefix count /31 339 % Prefix /31 0.15
Prefix count /32 25661 % Prefix /32 11.61
Prefix count /33 4669 % Prefix /33 2.11
Prefix count /34 4578 % Prefix /34 2.07
Prefix count /35 1620 % Prefix /35 0.73
Prefix count /36 8254 % Prefix /36 3.73
Prefix count /37 1275 % Prefix /37 0.58
Prefix count /38 2274 % Prefix /38 1.03
Prefix count /39 1700 % Prefix /39 0.77
Prefix count /40 20057 % Prefix /40 9.07
Prefix count /41 1449 % Prefix /41 0.66
Prefix count /42 2876 % Prefix /42 1.30
Prefix count /43 1306 % Prefix /43 0.59
Prefix count /44 21227 % Prefix /44 9.60
Prefix count /45 2883 % Prefix /45 1.30
Prefix count /46 5445 % Prefix /46 2.46
Prefix count /47 7576 % Prefix /47 3.43
Prefix count /48 100185 % Prefix /48 45.32
Prefix count /49 151 % Prefix /49 0.07
Prefix count /50 15 % Prefix /50 0.01
Prefix count /51 9 % Prefix /51 0.00
Prefix count /52 116 % Prefix /52 0.05
Prefix count /53 5 % Prefix /53 0.00
Prefix count /54 2 % Prefix /54 0.00
Prefix count /56 160 % Prefix /56 0.07
Prefix count /57 2 % Prefix /57 0.00
Prefix count /58 26 % Prefix /58 0.01
Prefix count /60 8 % Prefix /60 0.00
Prefix count /64 776 % Prefix /64 0.35
Prefix count /112 4 % Prefix /112 0.00
Prefix count /128 1 % Prefix /128 0.00

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 1 % Prefix /19 0.00
Prefix count /20 13 % Prefix /20 0.04
Prefix count /21 3 % Prefix /21 0.01
Prefix count /22 6 % Prefix /22 0.02
Prefix count /23 6 % Prefix /23 0.02
Prefix count /24 33 % Prefix /24 0.11
Prefix count /25 11 % Prefix /25 0.04
Prefix count /26 15 % Prefix /26 0.05
Prefix count /27 18 % Prefix /27 0.06
Prefix count /28 119 % Prefix /28 0.40
Prefix count /29 5352 % Prefix /29 17.99
Prefix count /30 341 % Prefix /30 1.15
Prefix count /31 213 % Prefix /31 0.72
Prefix count /32 23616 % Prefix /32 79.39
Prefix count /33 698 % Prefix /33 0.00
Prefix count /34 998 % Prefix /34 0.00
Prefix count /35 509 % Prefix /35 0.00
Prefix count /36 3453 % Prefix /36 0.00
Prefix count /37 242 % Prefix /37 0.00
Prefix count /38 1124 % Prefix /38 0.00
Prefix count /39 208 % Prefix /39 0.00
Prefix count /40 5495 % Prefix /40 0.00
Prefix count /41 563 % Prefix /41 0.00
Prefix count /42 993 % Prefix /42 0.00
Prefix count /43 627 % Prefix /43 0.00
Prefix count /44 5920 % Prefix /44 0.00
Prefix count /45 482 % Prefix /45 0.00
Prefix count /46 1482 % Prefix /46 0.00
Prefix count /47 1844 % Prefix /47 0.00
Prefix count /48 40329 % Prefix /48 0.00
Prefix count /49 2 % Prefix /49 0.00
Prefix count /56 6 % Prefix /56 0.00
Prefix count /60 1 % Prefix /60 0.00
Prefix count /64 17 % Prefix /64 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 536870912 % Addresses at AS distance 0 0
Addresses at AS distance 1 1123134603269 % Addresses at AS distance 1 0
Addresses at AS distance 2 91302160601145 % Addresses at AS distance 2 12
Addresses at AS distance 3 272871819553601 % Addresses at AS distance 3 37
Addresses at AS distance 4 219685265813383 % Addresses at AS distance 4 30
Addresses at AS distance 5 107474609704967 % Addresses at AS distance 5 14
Addresses at AS distance 6 28666492026880 % Addresses at AS distance 6 3
Addresses at AS distance 7 2527860293632 % Addresses at AS distance 7 0
Addresses at AS distance 8 914259902464 % Addresses at AS distance 8 0
Addresses at AS distance 9 120546394112 % Addresses at AS distance 9 0
Addresses at AS distance 10 131072 % Addresses at AS distance 10 0
Addresses at AS distance 11 67108864 % Addresses at AS distance 11 0
Addresses at AS distance 12 0 % Addresses at AS distance 12 0
Addresses at AS distance 13 0 % Addresses at AS distance 13 0
Addresses at AS distance 14 0 % Addresses at AS distance 14 0
Addresses at AS distance 15 0 % Addresses at AS distance 15 0
Addresses at AS distance 16 0 % Addresses at AS distance 16 0
Addresses at AS distance 17 0 % Addresses at AS distance 17 0
Addresses at AS distance 18 0 % Addresses at AS distance 18 0
Addresses at AS distance 19 0 % Addresses at AS distance 19 0
Addresses at AS distance 20 0 % Addresses at AS distance 20 0
Addresses at AS distance 21 0 % Addresses at AS distance 21 0
Addresses at AS distance 22 0 % Addresses at AS distance 22 0
Addresses at AS distance 23 0 % Addresses at AS distance 23 0
Addresses at AS distance 24 0 % Addresses at AS distance 24 0
Addresses at AS distance 25 65536 % Addresses at AS distance 25 0

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
Update rate, normalized by prefix count Announce Withdraw Path Chg

FIB Update Rate Reports
Updates per hour
(Measurement Period 0 hrs 59 mins) Data Announce Rate Data Withdraw Rate Data Path Chg Rate Data

Path Updates - Breakdown by Update Type

Examines those updates that involved a change of AS Path and breaks this down into five categories:

  • A change of origin AS (origin)
  • A change in the origin's nexthop AS (remote change)
  • A change in the transit AS path (transit)
  • A change in the firsthop AS (Local change)
  • A change in AS prepending (Traffic Engineering)

Total Data Origin Data Origin Next Hop Data Transit Data First Hop Data Prepend Data

AS Announcement Reports

The time trend of total span of address space advertised by ASes, using truncated prefix length as the span metric.

AS Announcements Reports Data Sets(txt) Percentage Reports Data

AS Connectivity Reports

This set of reports lists all visible AS's using a number of ordering criteria. The reports order AS's by the total span of addresses originated by an AS, the total span of addresses reachable via an AS, and the totspan of roiginating plus transit addresses via each AS. Each AS in an AS path has an adjacent AS closer to the sample point, and an adjacent AS further from the sample point. The number of such pairwise adjacencies is reported for each AS. The average AS Connectivity Degree is the average number of adjacent AS's for an AS.

AS Connectivity Report Data

Aggregation Reports

This set of reports lists all potential aggregation of a number of specific routes into an aggregate route. The aggregation criteria include a match of the original AS path, which may include prepended AS's, a match of the reduced AS Path, and a match on the Origin AS only. As this view is taken from a single sample point, this list is not definitive, and the report will propose potential aggregation actions which may not be feasible for the Origin AS.

Route Aggregation Reports Data

BGP Table


BGP Reports

Report Index


BGP data obtained from the boundary of AS131072.

Report last updated at Mon Mar 31 09:45:04 2025 UTC.

BGP table analyser written and maintained by Geoff Huston,


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