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Re: Bad bad routing problems?

  • From: Jesper Skriver
  • Date: Sat Aug 31 12:14:19 2002

I don't recieve that route from any of our transit providers,
and the only place I found it was at LINX from AS8001

ldn2nxg1#sh ip bgp 216.223.192.68
BGP routing table entry for 216.223.192.0/19, version 0
Paths: (1 available, no best path)
  Not advertised to any peer
  8001 4276, (received-only)
    195.66.224.94 from 195.66.224.94 (209.123.12.62)
      Origin IGP, metric 50, localpref 100, valid, external
      Community: 8001:120 8001:4000 8001:4001 8001:10000,
      mpls labels in/out unknown/exp-null

Where we didn't accept it due to not being corect registered in the
IRR's - could it really be that filtering is now so effective, that one
loose global reachability if it's not ?

/Jesper


On Sat, Aug 31, 2002 at 10:54:42AM -0400, Gerald wrote:
> 
> We are seeing bad routing problems from outside our network. Can anyone
> corroborate this or help?
> 
> We are on AS4276 and all traffic from us to our upstream seems good. Great
> way to spend holiday weekend. /me wonders if anyone is even awake on the
> NANOG list. :-)
> 
> 2 addresses in our network I've tested with are:
> 
> 216.223.200.14
> and 216.223.192.68
> 
> Many many traces done, some interesting ones below:
> 
> Here is a succesful traceroute:
> traceroute to 216.223.200.14 (216.223.200.14), 30 hops max, 40 byte
>   1   <10 ms   <10 ms   <10 ms  rt1.altair7.com [209.11.155.129]
>   2   <10 ms    15 ms    16 ms  209.10.41.130
>   3   <10 ms    16 ms    15 ms  ge-6-1-0.core1.sjc1.globix.net [209.10.2.193]
>   4   <10 ms    16 ms    16 ms  so-4-2-0.core1.sjc4.globix.net [209.10.11.221]
>   5    63 ms    46 ms    47 ms  so-1-0-0.core2.cgx2.globix.net [209.10.10.150]
>   6    62 ms    63 ms    47 ms  so-0-0-0.core1.cgx2.globix.net [209.10.10.157]
>   7    78 ms    94 ms    94 ms  so-1-0-0.core2.nyc8.globix.net [209.10.10.162]
>   8    78 ms    94 ms    94 ms  pos15-0.core2.nyc1.globix.net [209.10.11.169]
>   9    78 ms    94 ms    94 ms  s5-0-peer1.nyc3.globix.net [209.10.12.18]
>  10    78 ms    94 ms    94 ms  nyiix.peer.nac.net [198.32.160.20]
>  11    78 ms    94 ms    93 ms  internetchannel.customer.nac.net [209.123.10.34]
>  12    78 ms    94 ms    94 ms  auth-2.inch.com [216.223.200.14]
> 
> > These show failures before reaching our network:
> >
> > traceroute to 216.223.192.68 (216.223.192.68): 1-30 hops, 38 byte packets
> >  1  paleagw4.hpl.external.hp.com (192.6.19.2)  1.95 ms  1.95 ms  5.86 ms
> >  2  palgwb01-vbblpa.americas.hp.net (15.243.170.49)  0.976 ms  0.977 ms
> > 0.976 ms
> >  3  svl-edge-15.inet.qwest.net (65.115.64.25)  0.976 ms !H  *  0.977 ms !H
> >  4  * * *
> >  5  * * *
> >
> >
> >
> > traceroute to 216.223.192.68 (216.223.192.68), 30 hops max, 40 byte
> > packets
> >  1  e3-13.foundry1.cs.wisc.edu (198.133.224.116)  2.195 ms  1.754 ms
> > 1.663 ms
> >  2  e15.extreme1.cs.wisc.edu (128.105.1.1)  0.856 ms  0.765 ms  0.737 ms
> >  3  144.92.128.194 (144.92.128.194)  1.550 ms  1.171 ms  1.264 ms
> >  4  * * *
> >  5  * * *
> >
> > All global crossing traces seem to loop within their router:
> > traceroute to 216.223.192.68 (216.223.192.68), 30 hops max, 40 byte
> > 1 64.214.13.1 (64.214.13.1) 0.695 ms 0.889 ms 0.485 ms 0.453 ms 0.350 ms
> > 2 64.214.13.1 (64.214.13.1) 4.535 ms !N ms * ms 0.574 ms !N ms
> > 3 * (64.214.13.1) 64.214.13.1 ms 0.408 ms !N ms * ms 0.425 ms
> > 4 64.214.13.1 (64.214.13.1) 0.741 ms !N ms * ms 0.542 ms !N ms
> >
> > traceroute to 216.223.200.14 (216.223.200.14), 30 hops max, 40 byte
> >  1  ROUTER6.VINEYARD.NET (204.17.195.236)  0.401 ms  0.342 ms  0.325 ms
> >  2  bos-edge-01.inet.qwest.net (65.115.97.141)  7.249 ms  7.089 ms  6.943
> > ms
> >  3  * * *
> >  4  * * bos-edge-01.inet.qwest.net (65.115.97.141)  9.885 ms !H
> >  5  * * *
> >  6  * * *
> >  7  bos-edge-01.inet.qwest.net (65.115.97.141)  7.330 ms !H * *
> >  8  * * *
> >  9  * * *
> > 10  * * *
> > 11  * * *
> > 12  * * *
> > 13  * * *
> > 14  * * *
> > 15  * bos-edge-01.inet.qwest.net (65.115.97.141)  7.021 ms !H *
> > 16  * bos-edge-01.inet.qwest.net (65.115.97.141)  172.856 ms !H *
> > 17  * * *
> > 18  * * *
> > 19  * * bos-edge-01.inet.qwest.net (65.115.97.141)  7.127 ms !H
> > 20  * * bos-edge-01.inet.qwest.net (65.115.97.141)  6.787 ms !H
> > 21  * * bos-edge-01.inet.qwest.net (65.115.97.141)  61.972 ms !H
> > 22  * bos-edge-01.inet.qwest.net (65.115.97.141)  22.525 ms !H *
> > 23  * bos-edge-01.inet.qwest.net (65.115.97.141)  6.944 ms !H *
> > 24  bos-edge-01.inet.qwest.net (65.115.97.141)  15.922 ms !H * *
> > 25  bos-edge-01.inet.qwest.net (65.115.97.141)  11.212 ms !H *  6.895 ms
> >
> > This one works:
> >
> > traceroute to 216.223.192.68 (216.223.192.68), 30 hops max, 40 byte
> > 1 tin-V8.cac.washington.edu (140.142.3.1) 1 ms 0 ms 1 ms
> > 2 uwbr2-GE1-1.cac.washington.edu (140.142.155.24) 1 ms 1 ms 0 ms
> > 3 cnsp2-wes-GE0-1-0.pnw-gigapop.net (198.107.151.5) 1 ms 1 ms 1 ms
> > 4 ge-7-2-0.r04.sttlwa01.us.bb.verio.net (129.250.10.77) 0 ms 0 ms 1 ms
> > 5 p4-1-0-0.r03.sttlwa01.us.bb.verio.net (129.250.2.230) 0 ms 1 ms 0 ms
> > 6 p16-0-1-0.r20.sttlwa01.us.bb.verio.net (129.250.2.14) 1 ms 0 ms 1 ms
> > 7 p16-0-1-2.r21.plalca01.us.bb.verio.net (129.250.5.83) 23 ms 23 ms 23 ms
> > 8 p64-0-0-0.r20.plalca01.us.bb.verio.net (129.250.3.76) 22 ms 23 ms 22 ms
> > 9 p16-1-1-1.r20.dllstx01.us.bb.verio.net (129.250.4.104) 57 ms 57 ms 57 ms
> > 10 p64-0-0-0.r21.dllstx01.us.bb.verio.net (129.250.3.41) 57 ms 57 ms 57 ms
> > 11 p16-2-0-0.r00.stngva01.us.bb.verio.net (129.250.5.35) 87 ms 87 ms 88 ms
> > 12 p16-0-0-0.r02.stngva01.us.bb.verio.net (129.250.5.15) 87 ms 88 ms 87 ms
> > 13 p16-7-0-0.r02.mclnva02.us.bb.verio.net (129.250.5.47) 88 ms 88 ms 88 ms
> > 14 p4-3-0.r00.mclnva02.us.bb.verio.net (129.250.5.249) 88 ms 88 ms 88 ms
> > 15 mae-east-atm.peer.nac.net (198.32.187.103) 89 ms 89 ms 90 ms
> > 16 a9-0-1064.msfc1.nyc.nac.net (209.123.11.41) 95 ms 95 ms 96 ms
> > 17 internetchannel.customer.nac.net (209.123.10.34) 96 ms 96 ms 96 ms
> > 18 s0-varick-gw.inch.com (216.223.200.206) 100 ms 100 ms 100 ms
> > 19 rubber-biscuit.inch.com (216.223.192.98) 99 ms 99 ms 99 ms
> > 20 rubber-biscuit.inch.com (216.223.192.98) 99 ms !H 100 ms !H 98 ms !H
> 

/Jesper

-- 
Jesper Skriver, jesper(at)skriver(dot)dk  -  CCIE #5456
Senior network engineer @ AS3292, TDC Tele Danmark

One Unix to rule them all, One Resolver to find them,
One IP to bring them all and in the zone to bind them.




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