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   AS6447 BGP Routing Table Analysis Report












   
  BGP data obtained from AS6447
Report last updated at Wed Apr 14 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)1024889   Change in FIB Size-1   Change (%)-0.000
    All BGP entries (RIB)30845513
    RIB/FIB ratio (30845513/1024889)30.0964
      Valid entries30845513
      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)2942805334
    Total address space advertised (prefix length)0.54545503
    Percentage of IPv4 space advertised (2942805334/4294967295)68.517526
    Total address space advertised - corrected to 19 /8s(data)
Average address span 2871
    Average address span (as prefix size)20.5127
Average prefix length20.4012

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 aggregates508148       Specifics as % of FIB entries (508148/1024889)49.5808
    Specifics as % of address span (1176681797/2942805334)39.9850    
    Specifics where AS prepended Path matches aggregate216276         AS-P_Path-Match % (216276/508148)42.56
    AS Path matches aggregate236755         AS-Path-Match % (236755/508148)46.5917
    AS Origin matches aggregate390989         AS-Origin-Match % (390989/508148)76.9439
    Root Prefixes406506
Root Prefix Tree Depth(data)
      Root Prefixes with depth 0351015
      Root Prefixes with depth 143937
      Root Prefixes with depth 29257
      Root Prefixes with depth 31689
      Root Prefixes with depth 4441
      Root Prefixes with depth 5112
      Root Prefixes with depth 644
      Root Prefixes with depth 711

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 ASes71803       ASes visible in only one AS path41497
    Origin only ASes60374         Origin ASs announced via a single AS path40722
    Transit only ASes423       Originating AS ATOM count71380
    Mixed ASes11006         Originating AS ATOM compression0.0696
    Multi-Origin Prefixes6233    
    ASes originating a single prefix24956    
    Average entries per origin AS14.3582         Maximum entries for an origin AS (AS327687)133
    Average address range span for an origin AS41227.3092         Maximum address range for an origin AS (AS4134)116011264

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 Paths3720318       Unique AS prepended Paths3992434
AS Paths used in FIB124806       AS Paths using prepending1105622
    AS paths associated with a single FIB entry59426       AS Paths using private ASs680
    Average AS path length5.2087       Number of Prefixes with Selected AS Prepending Paths191708
      Maximum AS Path length16       Number of Prefixes with AS Prepending Paths191708
    Average address weighted AS path length7.1360         Maximum prepended AS Path length60
    Average entries per AS Path0.2755       Average entries per FIB AS Path8.2119
    AS Paths per origin AS52.1199       FIB AS Paths per origin AS1.7485
      AS PATH ATOM compression0.1218    

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 /825192       % Prefix /82.46
    Prefix count /912       % Prefix /90.00
    Prefix count /1040       % Prefix /100.00
    Prefix count /11102       % Prefix /110.01
    Prefix count /12295       % Prefix /120.03
    Prefix count /13584       % Prefix /130.06
    Prefix count /141198       % Prefix /140.12
    Prefix count /152021       % Prefix /150.20
    Prefix count /1613689       % Prefix /161.34
    Prefix count /178551       % Prefix /170.83
    Prefix count /1814588       % Prefix /181.42
    Prefix count /1926923       % Prefix /192.63
    Prefix count /2043926       % Prefix /204.29
    Prefix count /2153238       % Prefix /215.19
    Prefix count /22110123       % Prefix /2210.74
    Prefix count /2397706       % Prefix /239.53
    Prefix count /24616612       % Prefix /2460.16
    Prefix count /251984       % Prefix /250.19
    Prefix count /261286       % Prefix /260.13
    Prefix count /272220       % Prefix /270.22
    Prefix count /28401       % Prefix /280.04
    Prefix count /29326       % Prefix /290.03
    Prefix count /30186       % Prefix /300.02
    Prefix count /31269       % Prefix /310.03
    Prefix count /323417       % 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 /824       % Prefix /80.01
    Prefix count /97       % Prefix /90.00
    Prefix count /1040       % Prefix /100.01
    Prefix count /1196       % Prefix /110.02
    Prefix count /12255       % Prefix /120.06
    Prefix count /13473       % Prefix /130.12
    Prefix count /14995       % Prefix /140.24
    Prefix count /151612       % Prefix /150.40
    Prefix count /1610194       % Prefix /162.51
    Prefix count /174469       % Prefix /171.10
    Prefix count /186683       % Prefix /181.64
    Prefix count /1915085       % Prefix /193.71
    Prefix count /2019507       % Prefix /204.80
    Prefix count /2122354       % Prefix /215.50
    Prefix count /2257476       % Prefix /2214.14
    Prefix count /2336733       % Prefix /239.04
    Prefix count /24230469       % Prefix /2456.70
    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 /326       % 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 1241844356       % Addresses at AS distance 12515.3
    Addresses at AS distance 2354556233       % Addresses at AS distance 23687.6
    Addresses at AS distance 31111659769       % Addresses at AS distance 311562.0
    Addresses at AS distance 41257454366       % Addresses at AS distance 413078.4
    Addresses at AS distance 5826314635       % Addresses at AS distance 58594.2
    Addresses at AS distance 6432083692       % Addresses at AS distance 64494.0
    Addresses at AS distance 741837568       % Addresses at AS distance 7435.1
    Addresses at AS distance 810585664       % Addresses at AS distance 8110.1
    Addresses at AS distance 910957312       % Addresses at AS distance 9114.0
    Addresses at AS distance 1010960128       % Addresses at AS distance 10114.0
    Addresses at AS distance 116323456       % Addresses at AS distance 1165.8
    Addresses at AS distance 122816       % Addresses at AS distance 120.0
    Addresses at AS distance 130       % 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 hops241844356       % Addresses reachable within 1 AS hops2515
    Addresses reachable within 2 AS hops596400589       % Addresses reachable within 2 AS hops6202
    Addresses reachable within 3 AS hops1708060358       % Addresses reachable within 3 AS hops17765
    Addresses reachable within 4 AS hops2965514724       % Addresses reachable within 4 AS hops30843
    Addresses reachable within 5 AS hops3791829359       % Addresses reachable within 5 AS hops39437
    Addresses reachable within 6 AS hops4223913051       % Addresses reachable within 6 AS hops43931
    Addresses reachable within 7 AS hops4265750619       % Addresses reachable within 7 AS hops44366
    Addresses reachable within 8 AS hops4276336283       % Addresses reachable within 8 AS hops44476
    Addresses reachable within 9 AS hops4287293595       % Addresses reachable within 9 AS hops44590
    Addresses reachable within 10 AS hops3286427       % Addresses reachable within 10 AS hops34
    Addresses reachable within 11 AS hops9609883       % Addresses reachable within 11 AS hops99
    Addresses reachable within 12 AS hops9612699       % Addresses reachable within 12 AS hops99
    Addresses reachable within 13 AS hops9612699       % Addresses reachable within 13 AS hops99
    Addresses reachable within 14 AS hops9612699       % Addresses reachable within 14 AS hops99
    Addresses reachable within 15 AS hops9614747       % 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 hops40       % ASes reachable at 1 AS hops0
    ASes reachable at 2 AS hops17329       % ASes reachable at 2 AS hops24
    ASes reachable at 3 AS hops41430       % ASes reachable at 3 AS hops57
    ASes reachable at 4 AS hops10539       % ASes reachable at 4 AS hops14
    ASes reachable at 5 AS hops1848       % ASes reachable at 5 AS hops2
    ASes reachable at 6 AS hops360       % ASes reachable at 6 AS hops0
    ASes reachable at 7 AS hops160       % ASes reachable at 7 AS hops0
    ASes reachable at 8 AS hops87       % ASes reachable at 8 AS hops0
    ASes reachable at 9 AS hops7       % 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
    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 hops41       Cumulative % ASes by AS hops 10.1
    ASes reachable by 2 AS hops17370       Cumulative % ASes by AS hops 224.2
    ASes reachable by 3 AS hops58800       Cumulative % ASes by AS hops 381.9
    ASes reachable by 4 AS hops69339       Cumulative % ASes by AS hops 496.6
    ASes reachable by 5 AS hops71187       Cumulative % ASes by AS hops 599.1
    ASes reachable by 6 AS hops71547       Cumulative % ASes by AS hops 699.6
    ASes reachable by 7 AS hops71707       Cumulative % ASes by AS hops 799.9
    ASes reachable by 8 AS hops71794       Cumulative % ASes by AS hops 8100.0
    ASes reachable by 9 AS hops71801       Cumulative % ASes by AS hops 9100.0
    ASes reachable by 10 AS hops71802       Cumulative % ASes by AS hops 10100.0
    ASes reachable by 11 AS hops71802       Cumulative % ASes by AS hops 11100.0
    ASes reachable by 12 AS hops71802       Cumulative % ASes by AS hops 12100.0
    ASes reachable by 13 AS hops71802       Cumulative % ASes by AS hops 13100.0
    ASes reachable by 14 AS hops71802       Cumulative % ASes by AS hops 14100.0
    ASes reachable by 15 AS hops71803       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 /57       % 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 /10109       % AS's announcing span of /100.0015
    AS's announcing span of /11178       % AS's announcing span of /110.0025
    AS's announcing span of /12233       % AS's announcing span of /120.0033
    AS's announcing span of /13451       % AS's announcing span of /130.0063
    AS's announcing span of /14842       % AS's announcing span of /140.0118
    AS's announcing span of /151744       % AS's announcing span of /150.0245
    AS's announcing span of /161852       % AS's announcing span of /160.0260
    AS's announcing span of /172451       % AS's announcing span of /170.0345
    AS's announcing span of /183797       % AS's announcing span of /180.0534
    AS's announcing span of /195070       % AS's announcing span of /190.0713
    AS's announcing span of /207684       % AS's announcing span of /200.1081
    AS's announcing span of /2110308       % AS's announcing span of /210.1450
    AS's announcing span of /2212131       % AS's announcing span of /220.1706
    AS's announcing span of /237689       % AS's announcing span of /230.1081
    AS's announcing span of /2416311       % AS's announcing span of /240.2294
    AS's announcing span of /2517       % 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 /2820       % AS's announcing span of /280.0003
    AS's announcing span of /299       % AS's announcing span of /290.0001
    AS's announcing span of /301       % AS's announcing span of /300.0000
    AS's announcing span of /310       % 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 Count170214
Average AS Connectivity Degree (340428/71803)4.7411
Average AS Connectivity IN:OUT Degree0.2708
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 Path501279Report (sort by %reduction)Report (sort by reduction)BGP Table
    Aggregation using AS Path480465Report (sort by %reduction)Report (sort by reduction)BGP Table
    Aggregation using AS Origin331038Report (sort by %reduction)Report (sort by reduction)BGP Table
    Maximal Aggregation331065Report (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 Apr 14 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