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   AS6447 BGP Routing Table Analysis Report












   
  BGP data obtained from AS6447
Report last updated at Thu Apr 29 00:00:00 2021 (UTC+1000).
 

Active BGP entries (FIB)


Table Size Metrics

The trend of the size of the BGP Forwarding Table (FIB). Also 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)1031664   Change in FIB Size71   Change (%)0.007
    All BGP entries (RIB)30919966
    RIB/FIB ratio (30919966/1031664)29.9710
      Valid entries30919966
      Suppressed RIB entries0
      Damped entries0
      History entries0

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 (/32 equiv)3018647124
    Total address space advertised (prefix length)0.50874503
    Percentage of IPv4 space advertised (3018647124/4294967295)70.283355
    Total address space advertised - corrected to 19 /8s(data)
Average address span 2926
    Average address span (as prefix size)20.4858
Average prefix length20.3562

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 aggregates511941       Specifics as % of FIB entries (511941/1031664)49.6228
    Specifics as % of address span (1171421617/3018647124)38.8062    
    Specifics where AS prepended Path matches aggregate212128         AS-P_Path-Match % (212128/511941)41.44
    AS Path matches aggregate231673         AS-Path-Match % (231673/511941)45.2538
    AS Origin matches aggregate394176         AS-Origin-Match % (394176/511941)76.9964
    Root Prefixes406649
Root Prefix Tree Depth(data)
      Root Prefixes with depth 0350844
      Root Prefixes with depth 144192
      Root Prefixes with depth 29309
      Root Prefixes with depth 31698
      Root Prefixes with depth 4445
      Root Prefixes with depth 5110
      Root Prefixes with depth 641
      Root Prefixes with depth 710

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 ASes72021       ASes visible in only one AS path43405
    Origin only ASes60529         Origin ASs announced via a single AS path42573
    Transit only ASes432       Originating AS ATOM count71589
    Mixed ASes11060         Originating AS ATOM compression0.0694
    Multi-Origin Prefixes6372    
    ASes originating a single prefix24965    
    Average entries per origin AS14.4109         Maximum entries for an origin AS (AS327687)135
    Average address range span for an origin AS42166.3541         Maximum address range for an origin AS (AS8003)178348544

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 Paths3732032       Unique AS prepended Paths4001801
AS Paths used in FIB118199       AS Paths using prepending1090359
    AS paths associated with a single FIB entry55091       AS Paths using private ASs751
    Average AS path length5.2425       Number of Prefixes with Selected AS Prepending Paths188267
      Maximum AS Path length16       Number of Prefixes with AS Prepending Paths188267
    Average address weighted AS path length7.1399         Maximum prepended AS Path length60
    Average entries per AS Path0.2764       Average entries per FIB AS Path8.7282
    AS Paths per origin AS52.1314       FIB AS Paths per origin AS1.6511
      AS PATH ATOM compression0.1146    

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 /825958       % Prefix /82.52
    Prefix count /913       % Prefix /90.00
    Prefix count /1041       % Prefix /100.00
    Prefix count /11103       % Prefix /110.01
    Prefix count /12299       % Prefix /120.03
    Prefix count /13586       % Prefix /130.06
    Prefix count /141202       % Prefix /140.12
    Prefix count /152022       % Prefix /150.20
    Prefix count /1613643       % Prefix /161.32
    Prefix count /178536       % Prefix /170.83
    Prefix count /1814601       % Prefix /181.42
    Prefix count /1926915       % Prefix /192.61
    Prefix count /2044128       % Prefix /204.28
    Prefix count /2153324       % Prefix /215.17
    Prefix count /22110632       % Prefix /2210.72
    Prefix count /2398321       % Prefix /239.53
    Prefix count /24621301       % Prefix /2460.22
    Prefix count /251961       % Prefix /250.19
    Prefix count /261283       % Prefix /260.12
    Prefix count /272237       % Prefix /270.22
    Prefix count /28400       % Prefix /280.04
    Prefix count /29323       % Prefix /290.03
    Prefix count /30171       % Prefix /300.02
    Prefix count /31273       % Prefix /310.03
    Prefix count /323391       % Prefix /320.33

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 /827       % Prefix /80.01
    Prefix count /99       % Prefix /90.00
    Prefix count /1041       % Prefix /100.01
    Prefix count /1197       % Prefix /110.02
    Prefix count /12259       % Prefix /120.06
    Prefix count /13475       % Prefix /130.12
    Prefix count /141000       % Prefix /140.25
    Prefix count /151611       % Prefix /150.40
    Prefix count /1610157       % Prefix /162.50
    Prefix count /174471       % Prefix /171.10
    Prefix count /186718       % Prefix /181.65
    Prefix count /1915111       % Prefix /193.72
    Prefix count /2019123       % Prefix /204.70
    Prefix count /2121689       % Prefix /215.33
    Prefix count /2257696       % Prefix /2214.19
    Prefix count /2336978       % Prefix /239.09
    Prefix count /24231155       % Prefix /2456.84
    Prefix count /2515       % Prefix /250.00
    Prefix count /263       % Prefix /260.00
    Prefix count /277       % Prefix /270.00
    Prefix count /283       % Prefix /280.00
    Prefix count /290       % Prefix /290.00
    Prefix count /300       % Prefix /300.00
    Prefix count /310       % Prefix /310.00
    Prefix count /324       % Prefix /320.00

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 00       % Addresses at AS distance 00.0
    Addresses at AS distance 1243386820       % Addresses at AS distance 1303.5
    Addresses at AS distance 2389435157       % Addresses at AS distance 2485.6
    Addresses at AS distance 31033283305       % Addresses at AS distance 31288.4
    Addresses at AS distance 41215973459       % Addresses at AS distance 41516.3
    Addresses at AS distance 5954257413       % Addresses at AS distance 51189.9
    Addresses at AS distance 6445900107       % Addresses at AS distance 6556.0
    Addresses at AS distance 752981376       % Addresses at AS distance 766.1
    Addresses at AS distance 810530336       % Addresses at AS distance 813.1
    Addresses at AS distance 911122688       % Addresses at AS distance 913.9
    Addresses at AS distance 1011488768       % Addresses at AS distance 1014.3
    Addresses at AS distance 116791424       % Addresses at AS distance 118.5
    Addresses at AS distance 129472       % Addresses at AS distance 120.0
    Addresses at AS distance 131024       % Addresses at AS distance 130.0
    Addresses at AS distance 140       % Addresses at AS distance 140.0
    Addresses at AS distance 152048       % Addresses at AS distance 150.0
     
Cumulative Address by AS distance(data)   Cumulative % Address by AS distance(data)
    Addresses reachable within 0 AS hops0       % Addresses reachable within 0 AS hops0
    Addresses reachable within 1 AS hops243386820       % Addresses reachable within 1 AS hops303
    Addresses reachable within 2 AS hops632821977       % Addresses reachable within 2 AS hops789
    Addresses reachable within 3 AS hops1666105282       % Addresses reachable within 3 AS hops2077
    Addresses reachable within 4 AS hops2882078741       % Addresses reachable within 4 AS hops3593
    Addresses reachable within 5 AS hops3836336154       % Addresses reachable within 5 AS hops4783
    Addresses reachable within 6 AS hops4282236261       % Addresses reachable within 6 AS hops5339
    Addresses reachable within 7 AS hops40250341       % Addresses reachable within 7 AS hops50
    Addresses reachable within 8 AS hops50780677       % Addresses reachable within 8 AS hops63
    Addresses reachable within 9 AS hops61903365       % Addresses reachable within 9 AS hops77
    Addresses reachable within 10 AS hops73392133       % Addresses reachable within 10 AS hops91
    Addresses reachable within 11 AS hops80183557       % Addresses reachable within 11 AS hops99
    Addresses reachable within 12 AS hops80193029       % Addresses reachable within 12 AS hops99
    Addresses reachable within 13 AS hops80194053       % Addresses reachable within 13 AS hops99
    Addresses reachable within 14 AS hops80194053       % Addresses reachable within 14 AS hops99
    Addresses reachable within 15 AS hops80196101       % Addresses reachable within 15 AS hops100
     
ASes by AS distance(data)   % ASes by AS hops(data)
    ASes reachable at 0 AS hops1       % ASes reachable at 0 AS hops0
    ASes reachable at 1 AS hops41       % ASes reachable at 1 AS hops0
    ASes reachable at 2 AS hops17381       % ASes reachable at 2 AS hops24
    ASes reachable at 3 AS hops41721       % ASes reachable at 3 AS hops57
    ASes reachable at 4 AS hops10381       % ASes reachable at 4 AS hops14
    ASes reachable at 5 AS hops1828       % ASes reachable at 5 AS hops2
    ASes reachable at 6 AS hops383       % ASes reachable at 6 AS hops0
    ASes reachable at 7 AS hops176       % ASes reachable at 7 AS hops0
    ASes reachable at 8 AS hops98       % ASes reachable at 8 AS hops0
    ASes reachable at 9 AS hops10       % ASes reachable at 9 AS hops0
    ASes reachable at 10 AS hops0       % ASes reachable at 10 AS hops0
    ASes reachable at 11 AS hops0       % ASes reachable at 11 AS hops0
    ASes reachable at 12 AS hops0       % ASes reachable at 12 AS hops0
    ASes reachable at 13 AS hops0       % ASes reachable at 13 AS hops0
    ASes reachable at 14 AS hops0       % ASes reachable at 14 AS hops0
    ASes reachable at 15 AS hops1       % ASes reachable at 15 AS hops0
     
Cumulative ASes by AS hops(data)   Cumulative % ASes by AS hops(data)
    ASes reachable by 0 AS hops1       Cumulative % ASes by AS hops 00.0
    ASes reachable by 1 AS hops42       Cumulative % ASes by AS hops 10.1
    ASes reachable by 2 AS hops17423       Cumulative % ASes by AS hops 224.2
    ASes reachable by 3 AS hops59144       Cumulative % ASes by AS hops 382.1
    ASes reachable by 4 AS hops69525       Cumulative % ASes by AS hops 496.5
    ASes reachable by 5 AS hops71353       Cumulative % ASes by AS hops 599.1
    ASes reachable by 6 AS hops71736       Cumulative % ASes by AS hops 699.6
    ASes reachable by 7 AS hops71912       Cumulative % ASes by AS hops 799.8
    ASes reachable by 8 AS hops72010       Cumulative % ASes by AS hops 8100.0
    ASes reachable by 9 AS hops72020       Cumulative % ASes by AS hops 9100.0
    ASes reachable by 10 AS hops72020       Cumulative % ASes by AS hops 10100.0
    ASes reachable by 11 AS hops72020       Cumulative % ASes by AS hops 11100.0
    ASes reachable by 12 AS hops72020       Cumulative % ASes by AS hops 12100.0
    ASes reachable by 13 AS hops72020       Cumulative % ASes by AS hops 13100.0
    ASes reachable by 14 AS hops72020       Cumulative % ASes by AS hops 14100.0
    ASes reachable by 15 AS hops72021       Cumulative % ASes by AS hops 15100.0

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 ReportsData Sets(txt)  Percentage ReportsData
Originating Addresses AS Count(data)   Originating Addresses % AS Count(data)
    AS's announcing span of /41       % AS's announcing span of /40.0000
    AS's announcing span of /56       % AS's announcing span of /50.0001
    AS's announcing span of /611       % AS's announcing span of /60.0002
    AS's announcing span of /734       % AS's announcing span of /70.0005
    AS's announcing span of /844       % AS's announcing span of /80.0006
    AS's announcing span of /976       % AS's announcing span of /90.0011
    AS's announcing span of /10111       % AS's announcing span of /100.0016
    AS's announcing span of /11171       % AS's announcing span of /110.0024
    AS's announcing span of /12238       % AS's announcing span of /120.0033
    AS's announcing span of /13449       % AS's announcing span of /130.0063
    AS's announcing span of /14849       % AS's announcing span of /140.0119
    AS's announcing span of /151742       % AS's announcing span of /150.0244
    AS's announcing span of /161852       % AS's announcing span of /160.0260
    AS's announcing span of /172456       % AS's announcing span of /170.0345
    AS's announcing span of /183798       % AS's announcing span of /180.0533
    AS's announcing span of /195117       % AS's announcing span of /190.0718
    AS's announcing span of /207709       % AS's announcing span of /200.1082
    AS's announcing span of /2110284       % AS's announcing span of /210.1443
    AS's announcing span of /2212165       % AS's announcing span of /220.1707
    AS's announcing span of /237711       % AS's announcing span of /230.1082
    AS's announcing span of /2416370       % AS's announcing span of /240.2297
    AS's announcing span of /2518       % AS's announcing span of /250.0003
    AS's announcing span of /2611       % AS's announcing span of /260.0002
    AS's announcing span of /2716       % AS's announcing span of /270.0002
    AS's announcing span of /2819       % AS's announcing span of /280.0003
    AS's announcing span of /2910       % AS's announcing span of /290.0001
    AS's announcing span of /300       % AS's announcing span of /300.0000
    AS's announcing span of /311       % AS's announcing span of /310.0000
    AS's announcing span of /324       % AS's announcing span of /320.0001

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 originating 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 ReportData
AS Adjacency Count171242
Average AS Connectivity Degree (342484/72021)4.7553
Average AS Connectivity IN:OUT Degree0.2745
AS Names
AS's ordered by Originating Address
AS's ordered by Transit Address
AS's ordered by Originating + Transit Address
AS's ordered by AS Adjacency
AS's ordered by Downstream AS Adjacency
AS's ordered by Upstream AS Adjacency
AS Adjacency
Inconsistent Origin AS Prefixes

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. The report also applies a prefix length filter to all prefixes, accepting only those prefixes which pass the following ruleset:

Aggregation possibilities are identified within this filtered prefix set.

Route Aggregation ReportsData
Aggregation Potential Summary(data)
Aggregation Potential Summary(data)
    Aggregation using prepended AS Path500583Report (sort by %reduction)Report (sort by reduction)BGP Table
    Aggregation using AS Path478499Report (sort by %reduction)Report (sort by reduction)BGP Table
    Aggregation using AS Origin331881Report (sort by %reduction)Report (sort by reduction)BGP Table
    Maximal Aggregation331903Report (sort by %reduction)Report (sort by reduction)BGP Table

BGP Table
BGP Table
Table Summary Report


BGP Report

BGP data obtained from the boundary of AS6447

Report last updated at Thu Apr 29 00:00:00 2021 (UTC+1000).

Data prior to 11 April 97 interpreted from data gathered by Erik-Jan Bos, SURFnet.

BGP table analyser written and maintained by Geoff Huston.


Footnote