Sprint (1239) blackhole ? Or bogus /32 route ?

Thu Sep 26 17:31:34 UTC 2002

Here's what I see:

BGP routing table entry for 199.212.134.0/24, version 5658446
Paths: (3 available, best #2, table Default-IP-Routing-Table)
   Advertised to peer-groups:
      tn-core
   18984 3561 852 11647
     216.182.0.33 (metric 2965760) from 216.182.0.33 (216.182.0.33)
       Origin IGP, localpref 100, valid, internal
       Community: 233373696 1244135434
   1239 852 11647
     144.228.242.224 from 144.228.242.224 (144.228.242.224)
       Origin IGP, localpref 100, valid, external, best
   1239 852 11647, (received-only)
     144.228.242.224 from 144.228.242.224 (144.228.242.224)
       Origin IGP, metric 49, localpref 100, valid, external

core1-nwtnj#trace 199.212.134.9

Type escape sequence to abort.
Tracing the route to smtp2.sentex.ca (199.212.134.9)

   1 sl-gw32-pen-6-0-0-TS21.sprintlink.net (144.223.38.121) [AS 1239] 4 msec
     sl-gw32-pen-1-0-0-TS18.sprintlink.net (144.223.15.121) [AS 1239] 4 msec
     sl-gw32-pen-1-0-0-TS21.sprintlink.net (144.223.15.125) [AS 1239] 20 msec
   2 sl-bb20-pen-0-0.sprintlink.net (144.232.16.241) [AS 1239] !H  *  !H

Looks like something isn't right... I see the announcement from Sprint with 
an AS path of 1239 852 11647, but it never gets past one of the routers on 
Sprint's network. I have no problem going through Cable and Wireless:

Type escape sequence to abort.
Tracing the route to smtp2.sentex.ca (199.212.134.9)

   1 63-121-101-106.focaldata.net (63.121.101.106) [AS 18984] 0 msec 0 msec 
0 msec
   2 acr2-so-3-3-0.newyork.cw.net (206.24.193.153) [AS 3561] 0 msec 4 msec 
0 msec
   3 agr4-loopback.newyork.cw.net (206.24.194.104) [AS 3561] 4 msec 0 msec
     agr3-loopback.newyork.cw.net (206.24.194.103) [AS 3561] 4 msec
   4 dcr1-so-7-2-0.newyork.cw.net (206.24.207.73) [AS 3561] 4 msec
     dcr1-so-6-2-0.newyork.cw.net (206.24.207.57) [AS 3561] 0 msec
     dcr1-so-7-3-0.newyork.cw.net (206.24.207.77) [AS 3561] 4 msec
   5 telus-services-inc.newyork.cw.net (206.24.207.90) [AS 3561] 24 msec 24 
msec 20 msec
   6 toroonnlbr00.bb.telus.com (154.11.11.130) [AS 852] 20 msec 24 msec 20 msec
   7 toroonzddr00.bb.telus.com (154.11.6.67) [AS 852] 24 msec 24 msec 20 msec
   8 peer.toroonzddr00.bb.telus.com (209.115.141.5) [AS 852] 28 msec 28 
msec 32 msec
   9 iolite.sentex.ca (209.112.4.3) [AS 15290] 24 msec 24 msec 24 msec
  10 smtp2.sentex.ca (199.212.134.9) [AS 11647] 28 msec 24 msec 32 msec

I would contact Sprint. Good luck!

At 01:12 PM 9/26/2002 -0400, Mike Tancsa wrote:

>Hi,
>         I am trying to figure out if either sprint (as1239) has 
> blackholed a single IP address in my network or something strange is 
> up.  If anyone has transit connectivity to AS1239, can you tell me if 
> Sprint is sending 199.212.134.9/32 as a prefix ??
>
>e.g. from as1239's website looking glass 
>http://oxide.sprintlink.net/cgi-bin/glass.pl (only a traceroute interface)
>
>sl-bb20-ana>trace 199.212.134.9
>
>  Type escape sequence to abort.
>  Tracing the route to smtp2.sentex.ca (199.212.134.9)
>
>    1  *  *  *
>
>
>Yet, on that same subnet all else is fine
>
>sl-bb20-ana>trace 199.212.134.1
>
>  Type escape sequence to abort.
>  Tracing the route to ns.sentex.ca (199.212.134.1)
>
>    1 sl-bb22-ana-14-0.sprintlink.net (144.232.1.177) 4 msec
>      sl-bb23-fw-10-2.sprintlink.net (144.232.18.241) 24 msec
>      sl-bb22-ana-14-0.sprintlink.net (144.232.1.177) 0 msec
>    2 sl-bb25-chi-6-0.sprintlink.net (144.232.9.25) 56 msec
>      sl-bb22-fw-10-1.sprintlink.net (144.232.9.250) 24 msec
>      sl-bb25-chi-6-0.sprintlink.net (144.232.9.25) 52 msec
>    3 sl-bb22-chi-11-0.sprintlink.net (144.232.18.121) 48 msec
>      sl-bb25-chi-15-0.sprintlink.net (144.232.26.82) 52 msec
>      sl-bb22-chi-11-0.sprintlink.net (144.232.18.121) 44 msec
>    4 sl-gw33-chi-10-0.sprintlink.net (144.232.26.42) 52 msec
>      sl-gw33-chi-9-0.sprintlink.net (144.232.26.22) 60 msec
>      sl-gw33-chi-10-0.sprintlink.net (144.232.26.42) 48 msec
>    5 sl-splk-telus-1-0.sprintlink.net (144.223.35.30) 48 msec 52 msec 48 msec
>    6 chcnil23gr01.bb.telus.com (154.11.11.90) [AS 852] 48 msec
>      chcnil23gr01.bb.telus.com (154.11.11.94) [AS 852] 48 msec
>      chcnil23gr01.bb.telus.com (154.11.11.90) [AS 852] 48 msec
>    7 toroonxnbr00.bb.telus.com (154.11.11.5) [AS 852] 56 msec 64 msec 56 msec
>    8 toroonzddr00.bb.telus.com (154.11.6.67) [AS 852] 64 msec 56 msec 64 msec
>    9 peer.toroonzddr00.bb.telus.com (209.115.141.5) [AS 852] 60 msec 64 
> msec 64 msec
>   10 iolite.sentex.ca (209.112.4.3) [AS 15290] 64 msec 60 msec 64 msec
>   11 ns.sentex.ca (199.212.134.1) [AS 11647] 64 msec 64 msec 60 msec
>  sl-bb20-ana>
>
>
>I am guessing a blackhole, but I dont see where they told me or what list 
>that IP address is on... www.openrbl.org shows clean and all the box does 
>is outbound smtp...
>
>Anyone else see strange things like this ?
>
>         ---Mike
>--------------------------------------------------------------------
>Mike Tancsa,                                      tel +1 519 651 3400
>Sentex Communications,                            mike at sentex.net
>Providing Internet since 1994                    www.sentex.net
>Cambridge, Ontario Canada                         www.sentex.net/mike

Vinny Abello
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