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   AS6447 BGP Routing Table Analysis Report
   
  BGP data obtained from AS6447
Report last updated at Wed Feb 8 14:20:00 2012 (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)410286   Change in FIB Size1   Change (%)0.000
    All BGP entries (RIB)12618706
    RIB/FIB ratio (12618706/410286)30.7559
      Valid entries12618706
      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)2497800869
    Total address space advertised (prefix length)0.78198868
    Percentage of IPv4 space advertised (2497800869/4294967295)58.156458
    Total address space advertised - corrected to 19 /8s(data)
Average address span 6088
    Average address span (as prefix size)19.4285
Average prefix length22.4034

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 aggregates219182       Specifics as % of FIB entries (219182/410286)53.4218
    Specifics as % of address span (766746608/2497800869)30.6969    
    Specifics where AS prepended Path matches aggregate89163         AS-P_Path-Match % (89163/219182)40.68
    AS Path matches aggregate91825         AS-Path-Match % (91825/219182)41.8944
    AS Origin matches aggregate152997         AS-Origin-Match % (152997/219182)69.8036
    Root Prefixes191103
Root Prefix Tree Depth(data)
      Root Prefixes with depth 0166954
      Root Prefixes with depth 119501
      Root Prefixes with depth 23744
      Root Prefixes with depth 3707
      Root Prefixes with depth 4161
      Root Prefixes with depth 522
      Root Prefixes with depth 69
      Root Prefixes with depth 75

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 ASes40354       ASes visible in only one AS path26765
    Origin only ASes33997         Origin ASs announced via a single AS path26006
    Transit only ASes183       Originating AS ATOM count40171
    Mixed ASes6174         Originating AS ATOM compression0.0979
    Multi-Origin Prefixes2909    
    ASes originating a single prefix16812    
    Average entries per origin AS10.2135         Maximum entries for an origin AS (AS33363)2956
    Average address range span for an origin AS62179.2056         Maximum address range for an origin AS (AS4134)109881600

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 Paths1627116       Unique AS prepended Paths1712164
AS Paths used in FIB58378       AS Paths using prepending332533
    AS paths associated with a single FIB entry28546       AS Paths using private ASs813
    Average AS path length3.7709         Maximum AS Path length13
    Average address weighted AS path length4.4074         Maximum prepended AS Path length35
    Average entries per AS Path0.2522       Average entries per FIB AS Path7.0281
    AS Paths per origin AS40.5047       FIB AS Paths per origin AS1.4532
      AS PATH ATOM compression0.1423    

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 /820       % Prefix /80.00
    Prefix count /912       % Prefix /90.00
    Prefix count /1027       % Prefix /100.01
    Prefix count /1180       % Prefix /110.02
    Prefix count /12231       % Prefix /120.06
    Prefix count /13459       % Prefix /130.11
    Prefix count /14822       % Prefix /140.20
    Prefix count /151492       % Prefix /150.36
    Prefix count /1612349       % Prefix /163.01
    Prefix count /176444       % Prefix /171.57
    Prefix count /1810739       % Prefix /182.62
    Prefix count /1921242       % Prefix /195.18
    Prefix count /2030009       % Prefix /207.31
    Prefix count /2130291       % Prefix /217.38
    Prefix count /2240905       % Prefix /229.97
    Prefix count /2338413       % Prefix /239.36
    Prefix count /24211391       % Prefix /2451.52
    Prefix count /25753       % Prefix /250.18
    Prefix count /26774       % Prefix /260.19
    Prefix count /27646       % Prefix /270.16
    Prefix count /28718       % Prefix /280.18
    Prefix count /29820       % Prefix /290.20
    Prefix count /301177       % Prefix /300.29
    Prefix count /3126       % Prefix /310.01
    Prefix count /32445       % 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 /820       % Prefix /80.01
    Prefix count /94       % Prefix /90.00
    Prefix count /1027       % Prefix /100.01
    Prefix count /1178       % Prefix /110.04
    Prefix count /12207       % Prefix /120.11
    Prefix count /13391       % Prefix /130.20
    Prefix count /14730       % Prefix /140.38
    Prefix count /151222       % Prefix /150.64
    Prefix count /169544       % Prefix /164.99
    Prefix count /173697       % Prefix /171.93
    Prefix count /185973       % Prefix /183.13
    Prefix count /1912751       % Prefix /196.67
    Prefix count /2015878       % Prefix /208.31
    Prefix count /2115640       % Prefix /218.18
    Prefix count /2218249       % Prefix /229.55
    Prefix count /2316141       % Prefix /238.45
    Prefix count /2490460       % Prefix /2447.34
    Prefix count /2524       % Prefix /250.01
    Prefix count /2612       % Prefix /260.01
    Prefix count /277       % Prefix /270.00
    Prefix count /282       % Prefix /280.00
    Prefix count /294       % Prefix /290.00
    Prefix count /3030       % Prefix /300.02
    Prefix count /311       % Prefix /310.00
    Prefix count /3211       % 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 1265434425       % Addresses at AS distance 18.1
    Addresses at AS distance 21848565017       % Addresses at AS distance 256.3
    Addresses at AS distance 3974104664       % Addresses at AS distance 329.7
    Addresses at AS distance 4148549203       % Addresses at AS distance 44.5
    Addresses at AS distance 532499649       % Addresses at AS distance 51.0
    Addresses at AS distance 67863191       % Addresses at AS distance 60.2
    Addresses at AS distance 75288768       % Addresses at AS distance 70.2
    Addresses at AS distance 854528       % Addresses at AS distance 80.0
    Addresses at AS distance 913568       % Addresses at AS distance 90.0
    Addresses at AS distance 10256       % 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 hops265434425       % Addresses reachable within 1 AS hops8
    Addresses reachable within 2 AS hops2113999442       % Addresses reachable within 2 AS hops64
    Addresses reachable within 3 AS hops3088104106       % Addresses reachable within 3 AS hops94
    Addresses reachable within 4 AS hops3236653309       % Addresses reachable within 4 AS hops98
    Addresses reachable within 5 AS hops3269152958       % Addresses reachable within 5 AS hops99
    Addresses reachable within 6 AS hops3277016149       % Addresses reachable within 6 AS hops99
    Addresses reachable within 7 AS hops3282304917       % Addresses reachable within 7 AS hops99
    Addresses reachable within 8 AS hops3282359445       % Addresses reachable within 8 AS hops99
    Addresses reachable within 9 AS hops3282373013       % Addresses reachable within 9 AS hops99
    Addresses reachable within 10 AS hops3282373269       % Addresses reachable within 10 AS hops100
    Addresses reachable within 11 AS hops3282373269       % Addresses reachable within 11 AS hops100
    Addresses reachable within 12 AS hops3282373269       % 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 hops39       % ASes reachable at 1 AS hops0
    ASes reachable at 2 AS hops11311       % ASes reachable at 2 AS hops28
    ASes reachable at 3 AS hops22475       % ASes reachable at 3 AS hops55
    ASes reachable at 4 AS hops5527       % ASes reachable at 4 AS hops13
    ASes reachable at 5 AS hops814       % ASes reachable at 5 AS hops2
    ASes reachable at 6 AS hops102       % ASes reachable at 6 AS hops0
    ASes reachable at 7 AS hops76       % ASes reachable at 7 AS hops0
    ASes reachable at 8 AS hops6       % ASes reachable at 8 AS hops0
    ASes reachable at 9 AS hops0       % 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 hops3       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 hops11353       Cumulative % ASes by AS hops 228.1
    ASes reachable by 3 AS hops33828       Cumulative % ASes by AS hops 383.8
    ASes reachable by 4 AS hops39355       Cumulative % ASes by AS hops 497.5
    ASes reachable by 5 AS hops40169       Cumulative % ASes by AS hops 599.5
    ASes reachable by 6 AS hops40271       Cumulative % ASes by AS hops 699.8
    ASes reachable by 7 AS hops40347       Cumulative % ASes by AS hops 7100.0
    ASes reachable by 8 AS hops40353       Cumulative % ASes by AS hops 8100.0
    ASes reachable by 9 AS hops40353       Cumulative % ASes by AS hops 9100.0
    ASes reachable by 10 AS hops40354       Cumulative % ASes by AS hops 10100.0
    ASes reachable by 11 AS hops40354       Cumulative % ASes by AS hops 11100.0
    ASes reachable by 12 AS hops40354       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 /50.0002
    AS's announcing span of /65       % AS's announcing span of /60.0001
    AS's announcing span of /725       % AS's announcing span of /70.0006
    AS's announcing span of /828       % AS's announcing span of /80.0007
    AS's announcing span of /960       % AS's announcing span of /90.0015
    AS's announcing span of /1095       % AS's announcing span of /100.0024
    AS's announcing span of /11166       % AS's announcing span of /110.0042
    AS's announcing span of /12231       % AS's announcing span of /120.0058
    AS's announcing span of /13423       % AS's announcing span of /130.0106
    AS's announcing span of /14787       % AS's announcing span of /140.0197
    AS's announcing span of /151569       % AS's announcing span of /150.0393
    AS's announcing span of /161645       % AS's announcing span of /160.0412
    AS's announcing span of /171790       % AS's announcing span of /170.0448
    AS's announcing span of /182849       % AS's announcing span of /180.0713
    AS's announcing span of /193484       % AS's announcing span of /190.0872
    AS's announcing span of /204174       % AS's announcing span of /200.1045
    AS's announcing span of /214357       % AS's announcing span of /210.1090
    AS's announcing span of /224422       % AS's announcing span of /220.1107
    AS's announcing span of /234302       % AS's announcing span of /230.1077
    AS's announcing span of /249510       % AS's announcing span of /240.2380
    AS's announcing span of /2512       % AS's announcing span of /250.0003
    AS's announcing span of /265       % AS's announcing span of /260.0001
    AS's announcing span of /277       % AS's announcing span of /270.0002
    AS's announcing span of /283       % AS's announcing span of /280.0001
    AS's announcing span of /292       % 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 /310       % AS's announcing span of /310.0000
    AS's announcing span of /320       % 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 Count85319
Average AS Connectivity Degree (170638/40354)4.2285
Average AS Connectivity IN:OUT Degree0.2163
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 Path236865Report (sort by %reduction)Report (sort by reduction)BGP Table
    Aggregation using AS Path233984Report (sort by %reduction)Report (sort by reduction)BGP Table
    Aggregation using AS Origin175384Report (sort by %reduction)Report (sort by reduction)BGP Table
    Maximal Aggregation175429Report (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 Feb 8 14:20:00 2012 (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