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   AS6447 BGP Routing Table Analysis Report
   
  BGP data obtained from AS6447
Report last updated at Tue Apr 29 13:18:00 2003 (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)127635   Change in FIB Size0   Change (%)0.000
    All BGP entries (RIB)3339291
    RIB/FIB ratio (3339291/127635)26.1628
      Valid entries3339291
      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)1193068036
    Total address space advertised (prefix length)1.84797083
    Percentage of IPv4 space advertised (1193068036/4294967295)27.778280
    Total address space advertised - corrected to 19 /8s(data)
Average address span 9347
    Average address span (as prefix size)18.8097
Average prefix length22.2759

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 aggregates68391       Specifics as % of FIB entries (68391/127635)53.5833
    Specifics as % of address span (164844941/1193068036)13.8169    
    Specifics where AS prepended Path matches aggregate7205         AS-P_Path-Match % (7205/68391)10.54
    AS Path matches aggregate7308         AS-Path-Match % (7308/68391)10.6856
    AS Origin matches aggregate9874         AS-Origin-Match % (9874/68391)14.4376
    Root Prefixes59243
Root Prefix Tree Depth(data)
      Root Prefixes with depth 052221
      Root Prefixes with depth 15808
      Root Prefixes with depth 21045
      Root Prefixes with depth 3151
      Root Prefixes with depth 417
      Root Prefixes with depth 51

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 ASes15266       ASes visible in only one AS path10291
    Origin only ASes12810         Origin ASs announced via a single AS path9944
    Transit only ASes89       Originating AS ATOM count15177
    Mixed ASes2367         Originating AS ATOM compression0.1189
    Multi-Origin Prefixes1013    
    ASes originating a single prefix5931    
    Average entries per origin AS8.4098         Maximum entries for an origin AS (AS7018)1377
    Average address range span for an origin AS78610.2679         Maximum address range for an origin AS (AS7018)46675968

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 Paths436813       Unique AS prepended Paths453714
AS Paths used in FIB20574       AS Paths using prepending79647
    AS paths associated with a single FIB entry9781       AS Paths using private ASs50
    Average AS path length3.6044         Maximum AS Path length12
    Average address weighted AS path length3.9343         Maximum prepended AS Path length31
    Average entries per AS Path0.2922       Average entries per FIB AS Path6.2037
    AS Paths per origin AS28.7812       FIB AS Paths per origin AS1.3556
      AS PATH ATOM compression0.1612    

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 /816       % Prefix /80.01
    Prefix count /97       % Prefix /90.01
    Prefix count /108       % Prefix /100.01
    Prefix count /1113       % Prefix /110.01
    Prefix count /1250       % Prefix /120.04
    Prefix count /1395       % Prefix /130.07
    Prefix count /14252       % Prefix /140.20
    Prefix count /15467       % Prefix /150.37
    Prefix count /167421       % Prefix /165.81
    Prefix count /171684       % Prefix /171.32
    Prefix count /182992       % Prefix /182.34
    Prefix count /198460       % Prefix /196.63
    Prefix count /208554       % Prefix /206.70
    Prefix count /216131       % Prefix /214.80
    Prefix count /229117       % Prefix /227.14
    Prefix count /2310803       % Prefix /238.46
    Prefix count /2470909       % Prefix /2455.56
    Prefix count /25166       % Prefix /250.13
    Prefix count /26142       % Prefix /260.11
    Prefix count /27105       % Prefix /270.08
    Prefix count /2893       % Prefix /280.07
    Prefix count /2973       % Prefix /290.06
    Prefix count /3045       % Prefix /300.04
    Prefix count /315       % Prefix /310.00
    Prefix count /3227       % Prefix /320.02

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 /816       % Prefix /80.03
    Prefix count /93       % Prefix /90.01
    Prefix count /108       % Prefix /100.01
    Prefix count /1113       % Prefix /110.02
    Prefix count /1247       % Prefix /120.08
    Prefix count /1383       % Prefix /130.14
    Prefix count /14243       % Prefix /140.41
    Prefix count /15444       % Prefix /150.75
    Prefix count /167033       % Prefix /1611.87
    Prefix count /171167       % Prefix /171.97
    Prefix count /182200       % Prefix /183.71
    Prefix count /196090       % Prefix /1910.28
    Prefix count /205413       % Prefix /209.14
    Prefix count /212266       % Prefix /213.82
    Prefix count /223131       % Prefix /225.29
    Prefix count /233502       % Prefix /235.91
    Prefix count /2427541       % Prefix /2446.49
    Prefix count /2510       % Prefix /250.02
    Prefix count /268       % Prefix /260.01
    Prefix count /2712       % Prefix /270.02
    Prefix count /286       % Prefix /280.01
    Prefix count /292       % Prefix /290.00
    Prefix count /305       % Prefix /300.01
    Prefix count /310       % Prefix /310.00
    Prefix count /320       % 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 186913558       % Addresses at AS distance 16.4
    Addresses at AS distance 2716732567       % Addresses at AS distance 252.8
    Addresses at AS distance 3416588116       % Addresses at AS distance 330.7
    Addresses at AS distance 4123489008       % Addresses at AS distance 49.1
    Addresses at AS distance 513367712       % Addresses at AS distance 51.0
    Addresses at AS distance 6754176       % Addresses at AS distance 60.1
    Addresses at AS distance 764768       % Addresses at AS distance 70.0
    Addresses at AS distance 83072       % Addresses at AS distance 80.0
    Addresses at AS distance 90       % 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
     
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 hops86913558       % Addresses reachable within 1 AS hops6
    Addresses reachable within 2 AS hops803646125       % Addresses reachable within 2 AS hops59
    Addresses reachable within 3 AS hops1220234241       % Addresses reachable within 3 AS hops89
    Addresses reachable within 4 AS hops1343723249       % Addresses reachable within 4 AS hops98
    Addresses reachable within 5 AS hops1357090961       % Addresses reachable within 5 AS hops99
    Addresses reachable within 6 AS hops1357845137       % Addresses reachable within 6 AS hops99
    Addresses reachable within 7 AS hops1357909905       % Addresses reachable within 7 AS hops99
    Addresses reachable within 8 AS hops1357912977       % Addresses reachable within 8 AS hops100
    Addresses reachable within 9 AS hops1357912977       % Addresses reachable within 9 AS hops100
    Addresses reachable within 10 AS hops1357912977       % Addresses reachable within 10 AS hops100
    Addresses reachable within 11 AS hops1357912977       % Addresses reachable within 11 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 hops23       % ASes reachable at 1 AS hops0
    ASes reachable at 2 AS hops5573       % ASes reachable at 2 AS hops36
    ASes reachable at 3 AS hops7483       % ASes reachable at 3 AS hops49
    ASes reachable at 4 AS hops1838       % ASes reachable at 4 AS hops12
    ASes reachable at 5 AS hops312       % ASes reachable at 5 AS hops2
    ASes reachable at 6 AS hops34       % ASes reachable at 6 AS hops0
    ASes reachable at 7 AS hops2       % ASes reachable at 7 AS hops0
    ASes reachable at 8 AS hops0       % ASes reachable at 8 AS hops0
    ASes reachable at 9 AS hops0       % 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
     
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 hops24       Cumulative % ASes by AS hops 10.2
    ASes reachable by 2 AS hops5597       Cumulative % ASes by AS hops 236.7
    ASes reachable by 3 AS hops13080       Cumulative % ASes by AS hops 385.7
    ASes reachable by 4 AS hops14918       Cumulative % ASes by AS hops 497.7
    ASes reachable by 5 AS hops15230       Cumulative % ASes by AS hops 599.8
    ASes reachable by 6 AS hops15264       Cumulative % ASes by AS hops 6100.0
    ASes reachable by 7 AS hops15266       Cumulative % ASes by AS hops 7100.0
    ASes reachable by 8 AS hops15266       Cumulative % ASes by AS hops 8100.0
    ASes reachable by 9 AS hops15266       Cumulative % ASes by AS hops 9100.0
    ASes reachable by 10 AS hops15266       Cumulative % ASes by AS hops 10100.0
    ASes reachable by 11 AS hops15266       Cumulative % ASes by AS hops 11100.0

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 /61       % AS's announcing span of /60.0001
    AS's announcing span of /716       % AS's announcing span of /70.0011
    AS's announcing span of /88       % AS's announcing span of /80.0005
    AS's announcing span of /924       % AS's announcing span of /90.0016
    AS's announcing span of /1046       % AS's announcing span of /100.0031
    AS's announcing span of /1183       % AS's announcing span of /110.0055
    AS's announcing span of /12153       % AS's announcing span of /120.0102
    AS's announcing span of /13298       % AS's announcing span of /130.0198
    AS's announcing span of /14600       % AS's announcing span of /140.0399
    AS's announcing span of /151331       % AS's announcing span of /150.0885
    AS's announcing span of /161085       % AS's announcing span of /160.0721
    AS's announcing span of /17890       % AS's announcing span of /170.0592
    AS's announcing span of /181481       % AS's announcing span of /180.0984
    AS's announcing span of /191942       % AS's announcing span of /190.1291
    AS's announcing span of /201553       % AS's announcing span of /200.1032
    AS's announcing span of /211016       % AS's announcing span of /210.0675
    AS's announcing span of /221081       % AS's announcing span of /220.0719
    AS's announcing span of /231135       % AS's announcing span of /230.0754
    AS's announcing span of /242283       % AS's announcing span of /240.1517
    AS's announcing span of /256       % AS's announcing span of /250.0004
    AS's announcing span of /267       % AS's announcing span of /260.0005
    AS's announcing span of /273       % AS's announcing span of /270.0002
    AS's announcing span of /281       % 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.

yAzA yAzA yAzA
AS Connectivity ReportData
AS Adjacency Count29419
Average AS Connectivity Degree (58838/15266)3.8542
Average AS Connectivity IN:OUT Degree0.1644
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 Path102772Report (sort by %reduction)Report (sort by reduction)BGP Table
    Aggregation using AS Path102370Report (sort by %reduction)Report (sort by reduction)BGP Table
    Aggregation using AS Origin95454Report (sort by %reduction)Report (sort by reduction)BGP Table
    Maximal Aggregation63219Report (sort by %reduction)Report (sort by reduction)BGP Table
Prefix Length Filtered Aggregation Summary(data)
    Prefix length filtered81401Report (sort by %reduction)Report (sort by reduction)
    Prefix length filtered, Aggregation by prepended AS Path67103Report (sort by %reduction)Report (sort by reduction)
    Prefix length filtered, Aggregation by AS Path66875Report (sort by %reduction)Report (sort by reduction)
    Prefix length filtered, Aggregation by AS Origin63266Report (sort by %reduction)Report (sort by reduction)
    Prefix length filtered, Maximal Aggregation59537Report (sort by %reduction)Report (sort by reduction)

BGP Table
BGP Table
Table Summary Report

BGP Report

BGP data obtained from the boundary of AS6447

Report last updated at Tue Apr 29 13:18:00 2003 (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