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   AS6447 BGP Routing Table Analysis Report












   
  BGP data obtained from AS6447
Report last updated at Sun May 31 00:00:00 2020 (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)862954   Change in FIB Size-171   Change (%)-0.020
    All BGP entries (RIB)30156439
    RIB/FIB ratio (30156439/862954)34.9456
      Valid entries30156439
      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)2843124544
    Total address space advertised (prefix length)0.59516985
    Percentage of IPv4 space advertised (2843124544/4294967295)66.196652
    Total address space advertised - corrected to 19 /8s(data)
Average address span 3295
    Average address span (as prefix size)20.3144
Average prefix length22.8144

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 aggregates466343       Specifics as % of FIB entries (466343/862954)54.0403
    Specifics as % of address span (1118369352/2843124544)39.3359    
    Specifics where AS prepended Path matches aggregate191132         AS-P_Path-Match % (191132/466343)40.99
    AS Path matches aggregate202771         AS-Path-Match % (202771/466343)43.4811
    AS Origin matches aggregate353663         AS-Origin-Match % (353663/466343)75.8375
    Root Prefixes396611
Root Prefix Tree Depth(data)
      Root Prefixes with depth 0343667
      Root Prefixes with depth 142038
      Root Prefixes with depth 28746
      Root Prefixes with depth 31624
      Root Prefixes with depth 4412
      Root Prefixes with depth 590
      Root Prefixes with depth 627
      Root Prefixes with depth 77

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 ASes68928       ASes visible in only one AS path41158
    Origin only ASes57908         Origin ASs announced via a single AS path40222
    Transit only ASes405       Originating AS ATOM count68523
    Mixed ASes10615         Originating AS ATOM compression0.0794
    Multi-Origin Prefixes7925    
    ASes originating a single prefix24261    
    Average entries per origin AS12.5936         Maximum entries for an origin AS (AS327687)123
    Average address range span for an origin AS41491.5363         Maximum address range for an origin AS (AS4134)116087296

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 Paths3603228       Unique AS prepended Paths3853858
AS Paths used in FIB116349       AS Paths using prepending1017969
    AS paths associated with a single FIB entry54950       AS Paths using private ASs887
    Average AS path length4.8358       Number of Prefixes with Selected AS Prepending Paths130937
      Maximum AS Path length16       Number of Prefixes with AS Prepending Paths130937
    Average address weighted AS path length5.8217         Maximum prepended AS Path length101
    Average entries per AS Path0.2395       Average entries per FIB AS Path7.4169
    AS Paths per origin AS52.5842       FIB AS Paths per origin AS1.6980
      AS PATH ATOM compression0.1348    

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 /89       % Prefix /80.00
    Prefix count /911       % Prefix /90.00
    Prefix count /1038       % Prefix /100.00
    Prefix count /1199       % Prefix /110.01
    Prefix count /12288       % Prefix /120.03
    Prefix count /13578       % Prefix /130.07
    Prefix count /141180       % Prefix /140.14
    Prefix count /151992       % Prefix /150.23
    Prefix count /1613483       % Prefix /161.56
    Prefix count /178506       % Prefix /170.99
    Prefix count /1814266       % Prefix /181.65
    Prefix count /1926571       % Prefix /193.08
    Prefix count /2042652       % Prefix /204.94
    Prefix count /2150779       % Prefix /215.88
    Prefix count /22106889       % Prefix /2212.39
    Prefix count /2389618       % Prefix /2310.39
    Prefix count /24498504       % Prefix /2457.77
    Prefix count /251842       % Prefix /250.21
    Prefix count /261338       % Prefix /260.16
    Prefix count /271028       % Prefix /270.12
    Prefix count /28238       % Prefix /280.03
    Prefix count /29262       % Prefix /290.03
    Prefix count /30598       % Prefix /300.07
    Prefix count /31151       % Prefix /310.02
    Prefix count /322034       % Prefix /320.24

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 /89       % Prefix /80.00
    Prefix count /96       % Prefix /90.00
    Prefix count /1038       % Prefix /100.01
    Prefix count /1192       % Prefix /110.02
    Prefix count /12246       % Prefix /120.06
    Prefix count /13474       % Prefix /130.12
    Prefix count /14995       % Prefix /140.25
    Prefix count /151585       % Prefix /150.40
    Prefix count /1610147       % Prefix /162.56
    Prefix count /174413       % Prefix /171.11
    Prefix count /187109       % Prefix /181.79
    Prefix count /1915312       % Prefix /193.86
    Prefix count /2020541       % Prefix /205.18
    Prefix count /2122201       % Prefix /215.60
    Prefix count /2257443       % Prefix /2214.48
    Prefix count /2335654       % Prefix /238.99
    Prefix count /24219682       % Prefix /2455.39
    Prefix count /2514       % Prefix /250.00
    Prefix count /267       % Prefix /260.00
    Prefix count /2712       % Prefix /270.00
    Prefix count /285       % Prefix /280.00
    Prefix count /294       % Prefix /290.00
    Prefix count /30350       % Prefix /300.09
    Prefix count /318       % Prefix /310.00
    Prefix count /32264       % Prefix /320.07

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 1220406241       % Addresses at AS distance 15.6
    Addresses at AS distance 22053300888       % Addresses at AS distance 251.8
    Addresses at AS distance 3160376057       % Addresses at AS distance 34.0
    Addresses at AS distance 4375632328       % Addresses at AS distance 49.5
    Addresses at AS distance 5776455767       % Addresses at AS distance 519.6
    Addresses at AS distance 6294867254       % Addresses at AS distance 67.4
    Addresses at AS distance 742442158       % Addresses at AS distance 71.1
    Addresses at AS distance 819238163       % Addresses at AS distance 80.5
    Addresses at AS distance 910730240       % Addresses at AS distance 90.3
    Addresses at AS distance 107985152       % Addresses at AS distance 100.2
    Addresses at AS distance 1151200       % Addresses at AS distance 110.0
    Addresses at AS distance 127424       % 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 150       % 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 hops220406241       % Addresses reachable within 1 AS hops5
    Addresses reachable within 2 AS hops2273707129       % Addresses reachable within 2 AS hops57
    Addresses reachable within 3 AS hops2434083186       % Addresses reachable within 3 AS hops61
    Addresses reachable within 4 AS hops2809715514       % Addresses reachable within 4 AS hops70
    Addresses reachable within 5 AS hops3586171281       % Addresses reachable within 5 AS hops90
    Addresses reachable within 6 AS hops3881038535       % Addresses reachable within 6 AS hops97
    Addresses reachable within 7 AS hops3923480693       % Addresses reachable within 7 AS hops99
    Addresses reachable within 8 AS hops3942718856       % Addresses reachable within 8 AS hops99
    Addresses reachable within 9 AS hops3953449096       % Addresses reachable within 9 AS hops99
    Addresses reachable within 10 AS hops3961434248       % Addresses reachable within 10 AS hops99
    Addresses reachable within 11 AS hops3961485448       % Addresses reachable within 11 AS hops99
    Addresses reachable within 12 AS hops3961492872       % Addresses reachable within 12 AS hops99
    Addresses reachable within 13 AS hops3961493896       % Addresses reachable within 13 AS hops100
    Addresses reachable within 14 AS hops3961493896       % Addresses reachable within 14 AS hops100
    Addresses reachable within 15 AS hops3961493896       % 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 hops39       % ASes reachable at 1 AS hops0
    ASes reachable at 2 AS hops16710       % ASes reachable at 2 AS hops24
    ASes reachable at 3 AS hops39561       % ASes reachable at 3 AS hops57
    ASes reachable at 4 AS hops10225       % ASes reachable at 4 AS hops14
    ASes reachable at 5 AS hops1657       % ASes reachable at 5 AS hops2
    ASes reachable at 6 AS hops407       % ASes reachable at 6 AS hops0
    ASes reachable at 7 AS hops177       % ASes reachable at 7 AS hops0
    ASes reachable at 8 AS hops130       % ASes reachable at 8 AS hops0
    ASes reachable at 9 AS hops15       % ASes reachable at 9 AS hops0
    ASes reachable at 10 AS hops5       % ASes reachable at 10 AS hops0
    ASes reachable at 11 AS hops0       % ASes reachable at 11 AS hops0
    ASes reachable at 12 AS hops1       % 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 hops0       % 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 hops40       Cumulative % ASes by AS hops 10.1
    ASes reachable by 2 AS hops16750       Cumulative % ASes by AS hops 224.3
    ASes reachable by 3 AS hops56311       Cumulative % ASes by AS hops 381.7
    ASes reachable by 4 AS hops66536       Cumulative % ASes by AS hops 496.5
    ASes reachable by 5 AS hops68193       Cumulative % ASes by AS hops 598.9
    ASes reachable by 6 AS hops68600       Cumulative % ASes by AS hops 699.5
    ASes reachable by 7 AS hops68777       Cumulative % ASes by AS hops 799.8
    ASes reachable by 8 AS hops68907       Cumulative % ASes by AS hops 8100.0
    ASes reachable by 9 AS hops68922       Cumulative % ASes by AS hops 9100.0
    ASes reachable by 10 AS hops68927       Cumulative % ASes by AS hops 10100.0
    ASes reachable by 11 AS hops68927       Cumulative % ASes by AS hops 11100.0
    ASes reachable by 12 AS hops68928       Cumulative % ASes by AS hops 12100.0
    ASes reachable by 13 AS hops68928       Cumulative % ASes by AS hops 13100.0
    ASes reachable by 14 AS hops68928       Cumulative % ASes by AS hops 14100.0
    ASes reachable by 15 AS hops68928       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 /56       % AS's announcing span of /50.0001
    AS's announcing span of /610       % AS's announcing span of /60.0001
    AS's announcing span of /724       % AS's announcing span of /70.0004
    AS's announcing span of /842       % AS's announcing span of /80.0006
    AS's announcing span of /981       % AS's announcing span of /90.0012
    AS's announcing span of /10110       % AS's announcing span of /100.0016
    AS's announcing span of /11172       % AS's announcing span of /110.0025
    AS's announcing span of /12248       % AS's announcing span of /120.0036
    AS's announcing span of /13433       % AS's announcing span of /130.0064
    AS's announcing span of /14859       % AS's announcing span of /140.0126
    AS's announcing span of /151742       % AS's announcing span of /150.0256
    AS's announcing span of /161872       % AS's announcing span of /160.0275
    AS's announcing span of /172364       % AS's announcing span of /170.0347
    AS's announcing span of /183832       % AS's announcing span of /180.0562
    AS's announcing span of /195033       % AS's announcing span of /190.0738
    AS's announcing span of /207243       % AS's announcing span of /200.1063
    AS's announcing span of /219808       % AS's announcing span of /210.1439
    AS's announcing span of /2211742       % AS's announcing span of /220.1723
    AS's announcing span of /237062       % AS's announcing span of /230.1036
    AS's announcing span of /2415390       % AS's announcing span of /240.2258
    AS's announcing span of /2519       % AS's announcing span of /250.0003
    AS's announcing span of /2610       % AS's announcing span of /260.0001
    AS's announcing span of /2719       % AS's announcing span of /270.0003
    AS's announcing span of /2816       % AS's announcing span of /280.0002
    AS's announcing span of /2912       % 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 /323       % AS's announcing span of /320.0000

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 Count161197
Average AS Connectivity Degree (322394/68928)4.6773
Average AS Connectivity IN:OUT Degree0.2681
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 Path474743Report (sort by %reduction)Report (sort by reduction)BGP Table
    Aggregation using AS Path464495Report (sort by %reduction)Report (sort by reduction)BGP Table
    Aggregation using AS Origin317801Report (sort by %reduction)Report (sort by reduction)BGP Table
    Maximal Aggregation317842Report (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 Sun May 31 00:00:00 2020 (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