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   AS6447 BGP Routing Table Analysis Report
   
  BGP data obtained from AS6447
Report last updated at Mon May 21 12:00:00 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)422399   Change in FIB Size49   Change (%)0.012
    All BGP entries (RIB)12484437
    RIB/FIB ratio (12484437/422399)29.5560
      Valid entries12484437
      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)2551497329
    Total address space advertised (prefix length)0.75130301
    Percentage of IPv4 space advertised (2551497329/4294967295)59.406677
    Total address space advertised - corrected to 19 /8s(data)
Average address span 6040
    Average address span (as prefix size)19.4397
Average prefix length22.4040

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 aggregates222450       Specifics as % of FIB entries (222450/422399)52.6635
    Specifics as % of address span (752669867/2551497329)29.4991    
    Specifics where AS prepended Path matches aggregate81531         AS-P_Path-Match % (81531/222450)36.65
    AS Path matches aggregate84515         AS-Path-Match % (84515/222450)37.9928
    AS Origin matches aggregate158724         AS-Origin-Match % (158724/222450)71.3527
    Root Prefixes199949
Root Prefix Tree Depth(data)
      Root Prefixes with depth 0174805
      Root Prefixes with depth 120319
      Root Prefixes with depth 23871
      Root Prefixes with depth 3754
      Root Prefixes with depth 4166
      Root Prefixes with depth 523
      Root Prefixes with depth 69
      Root Prefixes with depth 72

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 ASes41375       ASes visible in only one AS path26817
    Origin only ASes34878         Origin ASs announced via a single AS path26054
    Transit only ASes180       Originating AS ATOM count41195
    Mixed ASes6317         Originating AS ATOM compression0.0975
    Multi-Origin Prefixes3126    
    ASes originating a single prefix17183    
    Average entries per origin AS10.2536         Maximum entries for an origin AS (AS34984)696
    Average address range span for an origin AS61937.0635         Maximum address range for an origin AS (AS4134)112443392

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 Paths1596549       Unique AS prepended Paths1679933
AS Paths used in FIB62763       AS Paths using prepending327149
    AS paths associated with a single FIB entry30741       AS Paths using private ASs863
    Average AS path length3.7922         Maximum AS Path length13
    Average address weighted AS path length4.3578         Maximum prepended AS Path length43
    Average entries per AS Path0.2646       Average entries per FIB AS Path6.7301
    AS Paths per origin AS38.7559       FIB AS Paths per origin AS1.5236
      AS PATH ATOM compression0.1486    

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 /819       % Prefix /80.00
    Prefix count /912       % Prefix /90.00
    Prefix count /1029       % Prefix /100.01
    Prefix count /1181       % Prefix /110.02
    Prefix count /12235       % Prefix /120.06
    Prefix count /13460       % Prefix /130.11
    Prefix count /14836       % Prefix /140.20
    Prefix count /151513       % Prefix /150.36
    Prefix count /1612390       % Prefix /162.93
    Prefix count /176449       % Prefix /171.53
    Prefix count /1810872       % Prefix /182.57
    Prefix count /1921349       % Prefix /195.05
    Prefix count /2030968       % Prefix /207.33
    Prefix count /2132014       % Prefix /217.58
    Prefix count /2241787       % Prefix /229.89
    Prefix count /2339670       % Prefix /239.39
    Prefix count /24219466       % Prefix /2451.96
    Prefix count /25646       % Prefix /250.15
    Prefix count /26638       % Prefix /260.15
    Prefix count /27472       % Prefix /270.11
    Prefix count /28548       % Prefix /280.13
    Prefix count /29627       % Prefix /290.15
    Prefix count /301069       % Prefix /300.25
    Prefix count /3123       % Prefix /310.01
    Prefix count /32226       % Prefix /320.05

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 /819       % Prefix /80.01
    Prefix count /94       % Prefix /90.00
    Prefix count /1029       % Prefix /100.01
    Prefix count /1179       % Prefix /110.04
    Prefix count /12216       % Prefix /120.11
    Prefix count /13391       % Prefix /130.20
    Prefix count /14752       % Prefix /140.38
    Prefix count /151261       % Prefix /150.63
    Prefix count /169636       % Prefix /164.82
    Prefix count /173769       % Prefix /171.88
    Prefix count /186182       % Prefix /183.09
    Prefix count /1913137       % Prefix /196.57
    Prefix count /2016477       % Prefix /208.24
    Prefix count /2116550       % Prefix /218.28
    Prefix count /2219068       % Prefix /229.54
    Prefix count /2317140       % Prefix /238.57
    Prefix count /2495160       % Prefix /2447.59
    Prefix count /2528       % Prefix /250.01
    Prefix count /2612       % Prefix /260.01
    Prefix count /277       % Prefix /270.00
    Prefix count /281       % Prefix /280.00
    Prefix count /294       % Prefix /290.00
    Prefix count /3023       % Prefix /300.01
    Prefix count /311       % Prefix /310.00
    Prefix count /323       % 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 1278582319       % Addresses at AS distance 18.4
    Addresses at AS distance 21827069410       % Addresses at AS distance 255.3
    Addresses at AS distance 3976534300       % Addresses at AS distance 329.6
    Addresses at AS distance 4176269080       % Addresses at AS distance 45.3
    Addresses at AS distance 532299749       % Addresses at AS distance 51.0
    Addresses at AS distance 68024242       % Addresses at AS distance 60.2
    Addresses at AS distance 75294144       % Addresses at AS distance 70.2
    Addresses at AS distance 886784       % Addresses at AS distance 80.0
    Addresses at AS distance 93072       % Addresses at AS distance 90.0
    Addresses at AS distance 104096       % 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 hops278582319       % Addresses reachable within 1 AS hops8
    Addresses reachable within 2 AS hops2105651729       % Addresses reachable within 2 AS hops63
    Addresses reachable within 3 AS hops3082186029       % Addresses reachable within 3 AS hops93
    Addresses reachable within 4 AS hops3258455109       % Addresses reachable within 4 AS hops98
    Addresses reachable within 5 AS hops3290754858       % Addresses reachable within 5 AS hops99
    Addresses reachable within 6 AS hops3298779100       % Addresses reachable within 6 AS hops99
    Addresses reachable within 7 AS hops3304073244       % Addresses reachable within 7 AS hops99
    Addresses reachable within 8 AS hops3304160028       % Addresses reachable within 8 AS hops99
    Addresses reachable within 9 AS hops3304163100       % Addresses reachable within 9 AS hops99
    Addresses reachable within 10 AS hops3304167196       % Addresses reachable within 10 AS hops100
    Addresses reachable within 11 AS hops3304167196       % Addresses reachable within 11 AS hops100
    Addresses reachable within 12 AS hops3304167196       % 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 hops11413       % ASes reachable at 2 AS hops27
    ASes reachable at 3 AS hops23196       % ASes reachable at 3 AS hops56
    ASes reachable at 4 AS hops5735       % ASes reachable at 4 AS hops13
    ASes reachable at 5 AS hops825       % ASes reachable at 5 AS hops1
    ASes reachable at 6 AS hops98       % ASes reachable at 6 AS hops0
    ASes reachable at 7 AS hops63       % ASes reachable at 7 AS hops0
    ASes reachable at 8 AS hops2       % 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 hops42       Cumulative % ASes by AS hops 10.1
    ASes reachable by 2 AS hops11455       Cumulative % ASes by AS hops 227.7
    ASes reachable by 3 AS hops34651       Cumulative % ASes by AS hops 383.7
    ASes reachable by 4 AS hops40386       Cumulative % ASes by AS hops 497.6
    ASes reachable by 5 AS hops41211       Cumulative % ASes by AS hops 599.6
    ASes reachable by 6 AS hops41309       Cumulative % ASes by AS hops 699.8
    ASes reachable by 7 AS hops41372       Cumulative % ASes by AS hops 7100.0
    ASes reachable by 8 AS hops41374       Cumulative % ASes by AS hops 8100.0
    ASes reachable by 9 AS hops41375       Cumulative % ASes by AS hops 9100.0
    ASes reachable by 10 AS hops41375       Cumulative % ASes by AS hops 10100.0
    ASes reachable by 11 AS hops41375       Cumulative % ASes by AS hops 11100.0
    ASes reachable by 12 AS hops41375       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 /57       % AS's announcing span of /50.0002
    AS's announcing span of /63       % AS's announcing span of /60.0001
    AS's announcing span of /726       % AS's announcing span of /70.0006
    AS's announcing span of /830       % AS's announcing span of /80.0007
    AS's announcing span of /961       % AS's announcing span of /90.0015
    AS's announcing span of /1096       % AS's announcing span of /100.0023
    AS's announcing span of /11158       % AS's announcing span of /110.0039
    AS's announcing span of /12224       % AS's announcing span of /120.0055
    AS's announcing span of /13435       % AS's announcing span of /130.0106
    AS's announcing span of /14791       % AS's announcing span of /140.0193
    AS's announcing span of /151574       % AS's announcing span of /150.0384
    AS's announcing span of /161662       % AS's announcing span of /160.0406
    AS's announcing span of /171855       % AS's announcing span of /170.0453
    AS's announcing span of /182844       % AS's announcing span of /180.0694
    AS's announcing span of /193579       % AS's announcing span of /190.0873
    AS's announcing span of /204284       % AS's announcing span of /200.1045
    AS's announcing span of /214535       % AS's announcing span of /210.1107
    AS's announcing span of /224537       % AS's announcing span of /220.1107
    AS's announcing span of /234425       % AS's announcing span of /230.1080
    AS's announcing span of /249828       % AS's announcing span of /240.2398
    AS's announcing span of /2511       % AS's announcing span of /250.0003
    AS's announcing span of /268       % AS's announcing span of /260.0002
    AS's announcing span of /275       % AS's announcing span of /270.0001
    AS's announcing span of /282       % AS's announcing span of /280.0000
    AS's announcing span of /292       % 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 /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.

ðÕÿÿÿ ðÕÿÿÿ ðÕÿÿÿ
AS Connectivity ReportData
AS Adjacency Count87256
Average AS Connectivity Degree (174512/41375)4.2178
Average AS Connectivity IN:OUT Degree0.2170
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 Path252250Report (sort by %reduction)Report (sort by reduction)BGP Table
    Aggregation using AS Path248977Report (sort by %reduction)Report (sort by reduction)BGP Table
    Aggregation using AS Origin178451Report (sort by %reduction)Report (sort by reduction)BGP Table
    Maximal Aggregation178507Report (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 Mon May 21 12:00:00 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