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   AS6447 BGP Routing Table Analysis Report
   
  BGP data obtained from AS6447
Report last updated at Thu Sep 2 06:00:00 2010 (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)346766   Change in FIB Size-3   Change (%)-0.001
    All BGP entries (RIB)11155165
    RIB/FIB ratio (11155165/346766)32.1691
      Valid entries11155165
      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)2315015726
    Total address space advertised (prefix length)0.89162515
    Percentage of IPv4 space advertised (2315015726/4294967295)53.900660
    Total address space advertised - corrected to 19 /8s(data)
Average address span 6676
    Average address span (as prefix size)19.2952
Average prefix length22.3660

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 aggregates185031       Specifics as % of FIB entries (185031/346766)53.3590
    Specifics as % of address span (673931292/2315015726)29.1113    
    Specifics where AS prepended Path matches aggregate74512         AS-P_Path-Match % (74512/185031)40.27
    AS Path matches aggregate76706         AS-Path-Match % (76706/185031)41.4558
    AS Origin matches aggregate125752         AS-Origin-Match % (125752/185031)67.9627
    Root Prefixes161735
Root Prefix Tree Depth(data)
      Root Prefixes with depth 0140834
      Root Prefixes with depth 116681
      Root Prefixes with depth 23429
      Root Prefixes with depth 3630
      Root Prefixes with depth 4131
      Root Prefixes with depth 522
      Root Prefixes with depth 67
      Root Prefixes with depth 71

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 ASes35725       ASes visible in only one AS path23689
    Origin only ASes30067         Origin ASs announced via a single AS path22996
    Transit only ASes170       Originating AS ATOM count35555
    Mixed ASes5488         Originating AS ATOM compression0.1025
    Multi-Origin Prefixes3581    
    ASes originating a single prefix15011    
    Average entries per origin AS9.7529         Maximum entries for an origin AS (AS4323)4509
    Average address range span for an origin AS65110.8347         Maximum address range for an origin AS (AS4134)97263616

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 Paths1499680       Unique AS prepended Paths1568615
AS Paths used in FIB51401       AS Paths using prepending272457
    AS paths associated with a single FIB entry25358       AS Paths using private ASs439
    Average AS path length3.7851         Maximum AS Path length13
    Average address weighted AS path length4.3455         Maximum prepended AS Path length44
    Average entries per AS Path0.2312       Average entries per FIB AS Path6.7463
    AS Paths per origin AS42.1792       FIB AS Paths per origin AS1.4457
      AS PATH ATOM compression0.1482    

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 /822       % Prefix /80.01
    Prefix count /910       % Prefix /90.00
    Prefix count /1025       % Prefix /100.01
    Prefix count /1168       % Prefix /110.02
    Prefix count /12199       % Prefix /120.06
    Prefix count /13419       % Prefix /130.12
    Prefix count /14727       % Prefix /140.21
    Prefix count /151326       % Prefix /150.38
    Prefix count /1611410       % Prefix /163.29
    Prefix count /175626       % Prefix /171.62
    Prefix count /189599       % Prefix /182.77
    Prefix count /1919450       % Prefix /195.61
    Prefix count /2024720       % Prefix /207.13
    Prefix count /2124613       % Prefix /217.10
    Prefix count /2232052       % Prefix /229.24
    Prefix count /2331781       % Prefix /239.16
    Prefix count /24179770       % Prefix /2451.84
    Prefix count /251196       % Prefix /250.34
    Prefix count /261312       % Prefix /260.38
    Prefix count /27905       % Prefix /270.26
    Prefix count /28401       % Prefix /280.12
    Prefix count /29321       % Prefix /290.09
    Prefix count /30417       % Prefix /300.12
    Prefix count /311       % Prefix /310.00
    Prefix count /32396       % Prefix /320.11

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 /822       % Prefix /80.01
    Prefix count /92       % Prefix /90.00
    Prefix count /1025       % Prefix /100.02
    Prefix count /1165       % Prefix /110.04
    Prefix count /12180       % Prefix /120.11
    Prefix count /13335       % Prefix /130.21
    Prefix count /14637       % Prefix /140.39
    Prefix count /151081       % Prefix /150.67
    Prefix count /169048       % Prefix /165.59
    Prefix count /173299       % Prefix /172.04
    Prefix count /185413       % Prefix /183.35
    Prefix count /1912290       % Prefix /197.60
    Prefix count /2014218       % Prefix /208.79
    Prefix count /2112460       % Prefix /217.70
    Prefix count /2214241       % Prefix /228.81
    Prefix count /2313772       % Prefix /238.52
    Prefix count /2474531       % Prefix /2446.08
    Prefix count /2535       % Prefix /250.02
    Prefix count /2614       % Prefix /260.01
    Prefix count /2711       % Prefix /270.01
    Prefix count /282       % Prefix /280.00
    Prefix count /293       % Prefix /290.00
    Prefix count /3033       % Prefix /300.02
    Prefix count /310       % Prefix /310.00
    Prefix count /3218       % Prefix /320.01

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 1253678384       % Addresses at AS distance 18.5
    Addresses at AS distance 21681059579       % Addresses at AS distance 256.2
    Addresses at AS distance 3815828604       % Addresses at AS distance 327.3
    Addresses at AS distance 4198473236       % Addresses at AS distance 46.6
    Addresses at AS distance 529295833       % Addresses at AS distance 51.0
    Addresses at AS distance 66997802       % Addresses at AS distance 60.2
    Addresses at AS distance 73601020       % Addresses at AS distance 70.1
    Addresses at AS distance 84368       % Addresses at AS distance 80.0
    Addresses at AS distance 98192       % Addresses at AS distance 90.0
    Addresses at AS distance 100       % Addresses at AS distance 100.0
    Addresses at AS distance 110       % Addresses at AS distance 110.0
    Addresses at AS distance 120       % 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 hops253678384       % Addresses reachable within 1 AS hops8
    Addresses reachable within 2 AS hops1934737963       % Addresses reachable within 2 AS hops64
    Addresses reachable within 3 AS hops2750566567       % Addresses reachable within 3 AS hops92
    Addresses reachable within 4 AS hops2949039803       % Addresses reachable within 4 AS hops98
    Addresses reachable within 5 AS hops2978335636       % Addresses reachable within 5 AS hops99
    Addresses reachable within 6 AS hops2985333438       % Addresses reachable within 6 AS hops99
    Addresses reachable within 7 AS hops2988934458       % Addresses reachable within 7 AS hops99
    Addresses reachable within 8 AS hops2988938826       % Addresses reachable within 8 AS hops99
    Addresses reachable within 9 AS hops2988947018       % Addresses reachable within 9 AS hops100
    Addresses reachable within 10 AS hops2988947018       % Addresses reachable within 10 AS hops100
    Addresses reachable within 11 AS hops2988947018       % Addresses reachable within 11 AS hops100
    Addresses reachable within 12 AS hops2988947018       % Addresses reachable within 12 AS hops100
     
ASes by AS distance(data)   % ASes by AS hops(data)
    ASes reachable at 0 AS hops3       % ASes reachable at 0 AS hops0
    ASes reachable at 1 AS hops44       % ASes reachable at 1 AS hops0
    ASes reachable at 2 AS hops10136       % ASes reachable at 2 AS hops28
    ASes reachable at 3 AS hops19843       % ASes reachable at 3 AS hops55
    ASes reachable at 4 AS hops4858       % ASes reachable at 4 AS hops13
    ASes reachable at 5 AS hops711       % ASes reachable at 5 AS hops1
    ASes reachable at 6 AS hops78       % ASes reachable at 6 AS hops0
    ASes reachable at 7 AS hops50       % ASes reachable at 7 AS hops0
    ASes reachable at 8 AS hops1       % ASes reachable at 8 AS hops0
    ASes reachable at 9 AS hops1       % 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
     
Cumulative ASes by AS hops(data)   Cumulative % ASes by AS hops(data)
    ASes reachable by 0 AS hops3       Cumulative % ASes by AS hops 00.0
    ASes reachable by 1 AS hops47       Cumulative % ASes by AS hops 10.1
    ASes reachable by 2 AS hops10183       Cumulative % ASes by AS hops 228.5
    ASes reachable by 3 AS hops30026       Cumulative % ASes by AS hops 384.0
    ASes reachable by 4 AS hops34884       Cumulative % ASes by AS hops 497.6
    ASes reachable by 5 AS hops35595       Cumulative % ASes by AS hops 599.6
    ASes reachable by 6 AS hops35673       Cumulative % ASes by AS hops 699.9
    ASes reachable by 7 AS hops35723       Cumulative % ASes by AS hops 7100.0
    ASes reachable by 8 AS hops35724       Cumulative % ASes by AS hops 8100.0
    ASes reachable by 9 AS hops35725       Cumulative % ASes by AS hops 9100.0
    ASes reachable by 10 AS hops35725       Cumulative % ASes by AS hops 10100.0
    ASes reachable by 11 AS hops35725       Cumulative % ASes by AS hops 11100.0
    ASes reachable by 12 AS hops35725       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 /53       % AS's announcing span of /50.0001
    AS's announcing span of /610       % AS's announcing span of /60.0003
    AS's announcing span of /722       % AS's announcing span of /70.0006
    AS's announcing span of /827       % AS's announcing span of /80.0008
    AS's announcing span of /946       % AS's announcing span of /90.0013
    AS's announcing span of /1080       % AS's announcing span of /100.0023
    AS's announcing span of /11156       % AS's announcing span of /110.0044
    AS's announcing span of /12228       % AS's announcing span of /120.0065
    AS's announcing span of /13361       % AS's announcing span of /130.0102
    AS's announcing span of /14725       % AS's announcing span of /140.0205
    AS's announcing span of /151532       % AS's announcing span of /150.0433
    AS's announcing span of /161548       % AS's announcing span of /160.0438
    AS's announcing span of /171604       % AS's announcing span of /170.0454
    AS's announcing span of /182469       % AS's announcing span of /180.0698
    AS's announcing span of /193224       % AS's announcing span of /190.0912
    AS's announcing span of /203600       % AS's announcing span of /200.1018
    AS's announcing span of /213650       % AS's announcing span of /210.1033
    AS's announcing span of /223854       % AS's announcing span of /220.1090
    AS's announcing span of /233931       % AS's announcing span of /230.1112
    AS's announcing span of /248240       % AS's announcing span of /240.2331
    AS's announcing span of /2523       % AS's announcing span of /250.0007
    AS's announcing span of /268       % AS's announcing span of /260.0002
    AS's announcing span of /274       % AS's announcing span of /270.0001
    AS's announcing span of /281       % AS's announcing span of /280.0000
    AS's announcing span of /291       % AS's announcing span of /290.0000
    AS's announcing span of /300       % 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 /321       % 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.

¹©R ¹©R ¹©R
AS Connectivity ReportData
AS Adjacency Count75499
Average AS Connectivity Degree (150998/35725)4.2267
Average AS Connectivity IN:OUT Degree0.2125
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 Path202345Report (sort by %reduction)Report (sort by reduction)BGP Table
    Aggregation using AS Path199713Report (sort by %reduction)Report (sort by reduction)BGP Table
    Aggregation using AS Origin153372Report (sort by %reduction)Report (sort by reduction)BGP Table
    Maximal Aggregation153371Report (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 Sep 2 06:00:00 2010 (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