Customer tagable Community Attribute Values

Prepend/Suppression Community Attribute Values (1273:3PPPN)
Introduction
Cable & Wireless allows customers to control certain traffic flows off-net with the implementation of community attribute values that prepend route/prefix paths with additional AS hops. These community attribute values, which the customer applies, affects the way C&W peers choose the degree of preference of a given prefix/route, because the number of AS hops within the route-path has been lengthened.
Format
The format for the second component of customer route community number (after 1273:) is set at five digits. This fixed length allows regular expressions to be used in applying a defined number of prepends to a given route/prefix path. This format is 1273:3PPPN, where the fields are coded in the following way. (Note: The first digit of the second component is always "3" then followed by variables of the "PPP" and "N" variables which are defined in the following tables.)
Variables
The "PPP" variable cross references off-net connections of C&W (please note that some of these are v6 only), defined in the following tables. (Note, this will always be a three digit value.)
  • Peer PPP codes: (PPP values 010-250)
    PPP CodePeer NamePeer AS Number
    202XOAS2828
    201SprintAS1239/AS6175
    200Verizon EuropeAS702/AS12702
    199Global CrossingAS3549
    198Tele2/SWIPNETAS1257
    197Tiscali/TinetAS3257
    196TeliaAS1299
    195France TelecomAS5511
    194SwisscomAS3303
    193COLTAS8220
    192EircomAS5466
    191AbovenetAS6461
    190DTAGAS3320
    189ArcorAS3209
    188AT&T EMEAAS2686
    187SavvisAS3561
    186ISC F-ROOT DNSAS33081/AS30132/AS27319/AS27318/AS23709/AS30128
    185NetnodAS8674
    184MessagelabsAS21345/AS26282
    183DENICAS31529
    179Internet2 (v6)AS11537
    178TelefonicaAS12956
    177Microsoft EUAS8068
    176TATA/TeleglobeAS6453
    175ReachAS4637
    174KPNAS286
    173BBCAS2818
    172BTAS5400
    170KDDIAS2516
    169MANDA (v6)AS8365
    168BT/InfonetAS3300
    167UPCAS6830
    164NTT/VerioAS2914
    163LINXAS5459
    162Net AccessAS8001
    161Telecom Italia/SeaboneAS6762
    160InterrouteAS8928
    159R-KOM (v6)AS12611
    158CogentAS174
    156Hurricane ElectricAS6939
    154PCCW/BtNAS3491
    151Akamai TechnologiesAS20940
    150GoogleAS15169
    149NeoAS8218
    148Sara (v6)AS1126
    147GiganewsAS30094
    146Ipercast (v6)AS34763/AS25286
    145GX NetworksAS5413
    144Lambdanet (v6)AS13237
    143CERNET (v6)AS23911
    142ASnet (v6)AS9264
    141ARIN (v6)AS10745
    140APNIC (v6)AS18366
    139Titan Networks (v6)AS20640
    137CBSAS6102
    134AMCAS29838
    133BeanfieldAS21949
    132BBC RDAS31459
    131Init7AS13030
    130Brazil TelecomAS8167
    129RIPE NCC DNS ServicesAS25152
    128SingtelAS7473
    127L-ROOT DNSAS20144
    126UKSolutionsAS20547
    124ClaraNET (v6)AS8426
    123OCCAID2 (v6)AS30071
    122TDCAS3292
    120TWCableAS7843
    119ComcastAS7922
    118WBS ConnectAS19080
    117WebsenseAS7598/AS35788/AS44444
    116InternodeAS4739
    115HighwindsAS12989
    114CovadAS18566
    113BandConAS26769
    112Leaseweb (trial)AS16265
    111Bell CanadaAS577
    110KabelBW (trial)AS29562
    1091&1 (trial)AS8560
    108IPTP (trial)AS41095
    107M247 (trial)AS9009
    101Rackspace.comAS36248
    100VerisignAS26415/AS36619/AS36620/AS36621/AS36622/AS36623/AS36625/AS36628
    099FreeAS12322
    098DatapipeAS14492
    097ISPrimeAS23393
    096Primus CanadaAS6407
    094HopOneAS14361
    092nLayerAS4436
    091WebairAS27257
    090Ezzi.netAS15149
    089TellurianAS10848
    088DALnetAS31800
    087New York InternetAS11403
    086Microsoft USAS8075
    083AT&T USAS7132
    082RCNAS6079
    081YahooAS10310
    080PCHAS42
    079PCHAS3856
    078CoxAS22773
    077Akamai TechnologiesAS12222
    076Rogers CableAS812
    075VideotronAS5769
    074MTS-Allstream IncAS15290
    073Group Telecom/Bell CanadaAS6539
    070Shaw Big PipeAS6327
    069Thorn CommunicationsAS12124
    068Limelight NetworksAS22822/AS38621
    067Stealth CommunicationsAS8002
    066TWTCAS4323
    065TDSAS4181
    063TerremarkAS23148
    062ProlexicAS32787
    061AARNetAS7575
    060MzimaAS25973
    059Peer1AS13768
    058Atlantech OnlineAS7784
    057MegapathAS4565
    056nTelosAS7795
    055Electric LightwaveAS5650
    054ESnetAS293
    053IIJAS2497
    052TWGateAS9505
    051China TelecomAS4134
    047Electronic ArtsAS14891
    046Carpathia HostingAS29748
    045Edge NetworksAS19029
    044GNAPSAS1784
    043Real ConnectAS16559
    039Cable VisionAS6128
    037WV FiberAS19151
    036VOXELAS29791
    035ChoopaAS20473
    034US LECAS1785
    033XANDAS11383
    032XEEXAS27524
    031ISPnetAS22691
    030NJIIX.NETAS19318
    029FLAG/RelianceAS15412
    028CacheNetworksAS30081
    025Exobit NetworksAS30653
    023InternapAS22212
    022NASAAS297
    021Equinix SingaporeAS9989
    020FacebookAS32934
    019AT&T ASPACAS2687
    018Microsoft ASPACAS8069/AS8071
    016BiznetAS17451
    015Equinix Hong KongAS24115
  • Global PPP codes: (PPP values 000-009)
    PPP CodeFunction
    000All Peers & Upstreams
    001All Upstreams
    002All Peers
  • Regional Upstream PPP codes: (PPP values 911 - 919)
    PPP CodeRegion
    911North America
    912Europe
    913Asia
    914Australia
    915South America
  • Regional Peering PPP codes: (PPP values 921 - 929)
    PPP CodeRegion
    921North America
    922Europe
    923Asia
    924Australia
    925South America
  • Peering point PPP codes: (PPP values 960-989)
    PPP CodePeering Point NamePeering Point Location
    989AMSIXAmsterdam, NL
    988DECIXFrankfurt, DE
    986INXSMunich, DE
    985LINXLondon, UK
    983EspanixMadrid, ES
    982Equinix ParisParis, FR
    978Equinix Hong KongHong Kong, HK
    977Equinix SingaporeSingapore, SG
    976HKIXHong Kong, HK
    975NAP of the AmericasMiami, FL, US
    974Any2Los Angeles, CA, US
    973LAIIXLos Angeles, CA, US
    972Equinix AshburnAshburn, VA, US
    971PAIX NYNew York, NY, US
    970NYIIXNew York, NY, US
  • Upstream PPP codes: (PPP values 990-998)
    PPP CodeUpstream NameUpstream AS number
    998Savvis CommunicationsAS3561
    996Level 3AS3356
    995ReachAS4637
  • The "N" variable cross references the number of prepends, defined in the following table.
    Allowable values of N:
    ValueEffect
    0Do not announce to selected peer
    1Prepend 1x to selected peer
    2Prepend 2x to selected peer
    3Prepend 3x to selected peer
    9Announce to this peer only (also announces to customers)
Examples
  • 1273:32000 - Do not announce to Verizon Europe (AS702)
  • 1273:31752 - Prepend twice to Reach (AS4637)
  • 1273:39963 - Prepend three times to Level 3 Upstream connection (AS3356)
Please note that mixing a 'prepend to IXP' or 'prepend to region' community with a 'prepend to specific peer' or global community may not have the intended effect. Prepending once to LINX and once to BT will lead to the route being prepended once to BT at LINX, whereas prepending an unequal number of times to an IXP and a peer at that IXP will lead to the sum of the prepends being added (e.g. prepending once to LINX and twice to BT will lead to three prepends being sent to BT at LINX). For this reason it is not recommended to mix specific and general prepend communities on the same routes.
C&W Blackhole Community Attribute Values (1273:666)
For customers that have a host or block under a DDoS, the affected host/block can be advertised to AS1273 with community string 1273:666. This will cause all traffic to that host/block to be black-holed at the core of the AS1273 network.This action will trigger emails sent to the appropriate security and operations groups for notification purposes. After advertising the prefix with 1273:666, the customer may open a ticket to request further assistance with their Cable & Wireless management agency, or open a ticket via email to trouble@eu.cw.net Once the attack has been mitigated, the customer will be responsible for removing the prefix from being advertised. Cable & Wireless will not be held responsible for customers who errantly advertise prefixes with the blackhole community string.
C&W local preference alteration communities
  • The local-preference hierarchy within C&W AS1273 is as follows
    ValueEffect
    100Customers (BGP and injected static)
    90Backup customer connections
    80Peers
    75Transit/Upstream Providers
    70Last resort customer connections
  • The following communities can be sent to influence the local-preference of a customer route
    ValueEffect
    1273:90Sets local preference value within AS1273 to 90
    1273:80Sets local preference value within AS1273 to 80
    1273:70Sets local preference value within AS1273 to 70
    1273:no-exportPrevents this route from being announce to any AS1273 EBGP peer
    1273:no-advertisePrevents this route from being announced to any AS1273 EBGP or IBGP peer