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   AS6447 BGP Routing Table Analysis Report












   
  BGP data obtained from AS6447
Report last updated at Wed Jan 27 04:40:00 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)900201   Change in FIB Size-85   Change (%)-0.009
    All BGP entries (RIB)31817452
    RIB/FIB ratio (31817452/900201)35.3448
      Valid entries31817452
      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)2922665921
    Total address space advertised (prefix length)0.55536222
    Percentage of IPv4 space advertised (2922665921/4294967295)68.048619
    Total address space advertised - corrected to 19 /8s(data)
Average address span 3247
    Average address span (as prefix size)20.3356
Average prefix length22.8740

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 aggregates500389       Specifics as % of FIB entries (500389/900201)55.5864
    Specifics as % of address span (1173122519/2922665921)40.1388    
    Specifics where AS prepended Path matches aggregate216163         AS-P_Path-Match % (216163/500389)43.20
    AS Path matches aggregate225499         AS-Path-Match % (225499/500389)45.0647
    AS Origin matches aggregate380633         AS-Origin-Match % (380633/500389)76.0674
    Root Prefixes399812
Root Prefix Tree Depth(data)
      Root Prefixes with depth 0344692
      Root Prefixes with depth 143711
      Root Prefixes with depth 29155
      Root Prefixes with depth 31675
      Root Prefixes with depth 4450
      Root Prefixes with depth 587
      Root Prefixes with depth 634
      Root Prefixes with depth 78

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 ASes71123       ASes visible in only one AS path43660
    Origin only ASes59810         Origin ASs announced via a single AS path42708
    Transit only ASes405       Originating AS ATOM count70718
    Mixed ASes10908         Originating AS ATOM compression0.0786
    Multi-Origin Prefixes5956    
    ASes originating a single prefix24730    
    Average entries per origin AS12.7294         Maximum entries for an origin AS (AS327687)130
    Average address range span for an origin AS41328.4584         Maximum address range for an origin AS (AS4134)116009216

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 Paths3797983       Unique AS prepended Paths4069427
AS Paths used in FIB111971       AS Paths using prepending1095282
    AS paths associated with a single FIB entry50814       AS Paths using private ASs704
    Average AS path length4.3060       Number of Prefixes with Selected AS Prepending Paths128099
      Maximum AS Path length13       Number of Prefixes with AS Prepending Paths128099
    Average address weighted AS path length5.3482         Maximum prepended AS Path length65
    Average entries per AS Path0.2370       Average entries per FIB AS Path8.0396
    AS Paths per origin AS53.7060       FIB AS Paths per origin AS1.5833
      AS PATH ATOM compression0.1244    

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 /813       % Prefix /80.00
    Prefix count /913       % Prefix /90.00
    Prefix count /1040       % Prefix /100.00
    Prefix count /11102       % Prefix /110.01
    Prefix count /12295       % Prefix /120.03
    Prefix count /13581       % Prefix /130.06
    Prefix count /141191       % Prefix /140.13
    Prefix count /152010       % Prefix /150.22
    Prefix count /1613625       % Prefix /161.51
    Prefix count /178498       % Prefix /170.94
    Prefix count /1814143       % Prefix /181.57
    Prefix count /1926653       % Prefix /192.96
    Prefix count /2042866       % Prefix /204.76
    Prefix count /2152264       % Prefix /215.81
    Prefix count /22107689       % Prefix /2211.96
    Prefix count /2395084       % Prefix /2310.56
    Prefix count /24522802       % Prefix /2458.08
    Prefix count /252167       % Prefix /250.24
    Prefix count /261532       % Prefix /260.17
    Prefix count /272313       % Prefix /270.26
    Prefix count /281020       % Prefix /280.11
    Prefix count /291217       % Prefix /290.14
    Prefix count /30485       % Prefix /300.05
    Prefix count /31142       % Prefix /310.02
    Prefix count /323456       % Prefix /320.38

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 /813       % Prefix /80.00
    Prefix count /98       % Prefix /90.00
    Prefix count /1038       % Prefix /100.01
    Prefix count /1194       % Prefix /110.02
    Prefix count /12252       % Prefix /120.06
    Prefix count /13468       % Prefix /130.12
    Prefix count /14991       % Prefix /140.25
    Prefix count /151589       % Prefix /150.40
    Prefix count /1610228       % Prefix /162.56
    Prefix count /174410       % Prefix /171.10
    Prefix count /186650       % Prefix /181.66
    Prefix count /1914911       % Prefix /193.73
    Prefix count /2018892       % Prefix /204.73
    Prefix count /2122106       % Prefix /215.53
    Prefix count /2257031       % Prefix /2214.26
    Prefix count /2335976       % Prefix /239.00
    Prefix count /24226094       % Prefix /2456.55
    Prefix count /2521       % Prefix /250.01
    Prefix count /266       % Prefix /260.00
    Prefix count /277       % Prefix /270.00
    Prefix count /289       % Prefix /280.00
    Prefix count /299       % Prefix /290.00
    Prefix count /300       % Prefix /300.00
    Prefix count /310       % Prefix /310.00
    Prefix count /329       % 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 1238576879       % Addresses at AS distance 15.8
    Addresses at AS distance 22131888358       % Addresses at AS distance 252.1
    Addresses at AS distance 3416582498       % Addresses at AS distance 310.2
    Addresses at AS distance 4922148873       % Addresses at AS distance 422.5
    Addresses at AS distance 5296999569       % Addresses at AS distance 57.3
    Addresses at AS distance 644066087       % Addresses at AS distance 61.1
    Addresses at AS distance 726656640       % Addresses at AS distance 70.7
    Addresses at AS distance 811435296       % Addresses at AS distance 80.3
    Addresses at AS distance 97379200       % Addresses at AS distance 90.2
    Addresses at AS distance 1047872       % Addresses at AS distance 100.0
    Addresses at AS distance 116912       % Addresses at AS distance 110.0
    Addresses at AS distance 12256       % Addresses at AS distance 120.0
     
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 hops238576879       % Addresses reachable within 1 AS hops5
    Addresses reachable within 2 AS hops2370465237       % Addresses reachable within 2 AS hops57
    Addresses reachable within 3 AS hops2787047735       % Addresses reachable within 3 AS hops68
    Addresses reachable within 4 AS hops3709196608       % Addresses reachable within 4 AS hops90
    Addresses reachable within 5 AS hops4006196177       % Addresses reachable within 5 AS hops97
    Addresses reachable within 6 AS hops4050262264       % Addresses reachable within 6 AS hops98
    Addresses reachable within 7 AS hops4076918904       % Addresses reachable within 7 AS hops99
    Addresses reachable within 8 AS hops4088354200       % Addresses reachable within 8 AS hops99
    Addresses reachable within 9 AS hops4095733400       % Addresses reachable within 9 AS hops99
    Addresses reachable within 10 AS hops4095781272       % Addresses reachable within 10 AS hops99
    Addresses reachable within 11 AS hops4095788184       % Addresses reachable within 11 AS hops99
    Addresses reachable within 12 AS hops4095788440       % Addresses reachable within 12 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 hops40       % ASes reachable at 1 AS hops0
    ASes reachable at 2 AS hops17222       % ASes reachable at 2 AS hops24
    ASes reachable at 3 AS hops41149       % ASes reachable at 3 AS hops57
    ASes reachable at 4 AS hops10317       % ASes reachable at 4 AS hops14
    ASes reachable at 5 AS hops1791       % ASes reachable at 5 AS hops2
    ASes reachable at 6 AS hops344       % ASes reachable at 6 AS hops0
    ASes reachable at 7 AS hops169       % ASes reachable at 7 AS hops0
    ASes reachable at 8 AS hops84       % ASes reachable at 8 AS hops0
    ASes reachable at 9 AS hops5       % ASes reachable at 9 AS hops0
    ASes reachable at 10 AS hops1       % 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
     
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 hops41       Cumulative % ASes by AS hops 10.1
    ASes reachable by 2 AS hops17263       Cumulative % ASes by AS hops 224.3
    ASes reachable by 3 AS hops58412       Cumulative % ASes by AS hops 382.1
    ASes reachable by 4 AS hops68729       Cumulative % ASes by AS hops 496.6
    ASes reachable by 5 AS hops70520       Cumulative % ASes by AS hops 599.2
    ASes reachable by 6 AS hops70864       Cumulative % ASes by AS hops 699.6
    ASes reachable by 7 AS hops71033       Cumulative % ASes by AS hops 799.9
    ASes reachable by 8 AS hops71117       Cumulative % ASes by AS hops 8100.0
    ASes reachable by 9 AS hops71122       Cumulative % ASes by AS hops 9100.0
    ASes reachable by 10 AS hops71123       Cumulative % ASes by AS hops 10100.0
    ASes reachable by 11 AS hops71123       Cumulative % ASes by AS hops 11100.0
    ASes reachable by 12 AS hops71123       Cumulative % ASes by AS hops 12100.0

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 /56       % AS's announcing span of /50.0001
    AS's announcing span of /613       % AS's announcing span of /60.0002
    AS's announcing span of /723       % AS's announcing span of /70.0003
    AS's announcing span of /845       % AS's announcing span of /80.0006
    AS's announcing span of /979       % AS's announcing span of /90.0011
    AS's announcing span of /10107       % AS's announcing span of /100.0015
    AS's announcing span of /11177       % AS's announcing span of /110.0025
    AS's announcing span of /12240       % AS's announcing span of /120.0034
    AS's announcing span of /13432       % AS's announcing span of /130.0061
    AS's announcing span of /14850       % AS's announcing span of /140.0121
    AS's announcing span of /151761       % AS's announcing span of /150.0250
    AS's announcing span of /161854       % AS's announcing span of /160.0264
    AS's announcing span of /172437       % AS's announcing span of /170.0346
    AS's announcing span of /183778       % AS's announcing span of /180.0537
    AS's announcing span of /195091       % AS's announcing span of /190.0724
    AS's announcing span of /207551       % AS's announcing span of /200.1073
    AS's announcing span of /2110289       % AS's announcing span of /210.1462
    AS's announcing span of /2212039       % AS's announcing span of /220.1711
    AS's announcing span of /237461       % AS's announcing span of /230.1060
    AS's announcing span of /2416044       % AS's announcing span of /240.2280
    AS's announcing span of /2516       % AS's announcing span of /250.0002
    AS's announcing span of /2612       % AS's announcing span of /260.0002
    AS's announcing span of /2715       % AS's announcing span of /270.0002
    AS's announcing span of /2822       % AS's announcing span of /280.0003
    AS's announcing span of /2911       % AS's announcing span of /290.0002
    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 Count168390
Average AS Connectivity Degree (336780/71123)4.7352
Average AS Connectivity IN:OUT Degree0.2700
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 Path482147Report (sort by %reduction)Report (sort by reduction)BGP Table
    Aggregation using AS Path470662Report (sort by %reduction)Report (sort by reduction)BGP Table
    Aggregation using AS Origin327869Report (sort by %reduction)Report (sort by reduction)BGP Table
    Maximal Aggregation327912Report (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 Wed Jan 27 04:40:00 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