Frustrating loss of connectivity...

Haesu haesu at towardex.com
Mon Oct 13 16:44:51 UTC 2003


Doh! silly me... I didn't read the whole email in the first time.. Sorry about useless post :(

-hc

-- 
Haesu C.
TowardEX Technologies, Inc.
Consulting, colocation, web hosting, network design and implementation
http://www.towardex.com | haesu at towardex.com
Cell: (978)394-2867     | Office: (978)263-3399 Ext. 170
Fax: (978)263-0033      | POC: HAESU-ARIN

On Mon, Oct 13, 2003 at 12:23:05PM -0400, Haesu wrote:
> 
> Hi, have you tried the return path traceroute... Like, run traceroute _From_ the server behind dsl and back to you? Having traceroutes done either way may be helpful often times b/c sometimes problems do rise on asymetric routing situation where provider is doing bgp with x no. of providers.
> 
> Please feel free to reply to me off list. I understand your frustration to get this out to bunch of engineers, but this may be clasifed as off-topic..
> 
> Thanks,
> -hc
> 
> -- 
> Haesu C.
> TowardEX Technologies, Inc.
> Consulting, colocation, web hosting, network design and implementation
> http://www.towardex.com | haesu at towardex.com
> Cell: (978)394-2867     | Office: (978)263-3399 Ext. 170
> Fax: (978)263-0033      | POC: HAESU-ARIN
> 
> On Mon, Oct 13, 2003 at 10:33:26AM -0500, Robert A. Hayden wrote:
> > 
> > Hey all,
> > 
> > I apologize for posting this here, especially for what is essentially an
> > end-user broadband issue, but I'm looking at what appears to be a link a
> > few hops upstream from me that has been flapping frequently and I can't
> > get our provider to look into it.
> > 
> > I am located in Madison, WI, and I have my mail/server machine geek.net
> > co-located in Minneapolis on a business-class DSL line (1.5m/384k).  For
> > the past couple of months, I'll lose connectivity for about 5 minutes
> > several times a day.
> > 
> > We attempted to open a case with the DSL provider (covad), but they were
> > only interested in addressing last-mile issues and we got nowhere.  Same
> > applied when addressing it from my broadband end, since the disconnect is
> > 3 providers upstream.
> > 
> > In any case, any thoughts on where I should go with this?  I could try 
> > Level3, but I suspect they'll blow me off since I'm not a direct customer.  
> > It's getting quite frustrating as I'm trying to move a few hundred mb back 
> > and forth over the VPN and with that one link flapping it's become almost 
> > impossible.
> > 
> > Traceroute examples included below.  I left real IPs here since they are 
> > all easily determined anyways:
> > 
> > ------
> > 
> > TRACE #1:  From my home connection to Geek.NET when it's BROKEN, note 
> > where it breaks.
> > 
> > C:\>tracert 66.166.71.243
> > 
> > Tracing route to geek.net [66.166.71.243]
> > over a maximum of 30 hops:
> > 
> >   1    24 ms    10 ms    29 ms  10.44.64.1
> >   2    11 ms    10 ms    11 ms  172.18.98.98
> >   3    19 ms    22 ms    43 ms  172.18.97.58
> >   4    16 ms    14 ms    15 ms  12.125.143.113
> >   5    58 ms    34 ms    47 ms  gbr2-a90s19.cgcil.ip.att.net [12.123.5.78]
> >   6    16 ms    17 ms    16 ms  tbr1-p013602.cgcil.ip.att.net [12.122.11.37]
> >   7    31 ms    28 ms    14 ms  ggr2-p310.cgcil.ip.att.net [12.123.6.65]
> >   8    16 ms   105 ms    16 ms  so-1-1-0.edge1.Chicago1.Level3.net [209.0.227.77]
> >   9    21 ms    21 ms    33 ms  so-2-1-0.bbr2.Chicago1.level3.net [209.244.8.13]
> >  10    32 ms    19 ms    14 ms  pos9-0.core1.Chicago1.level3.net [209.247.10.170]
> >  11    20 ms    31 ms    48 ms  gige6-2.ipcolo2.Chicago1.Level3.net [209.244.8.30]
> >  12    64 ms    29 ms    36 ms  unknown.Level3.net [209.247.226.26]
> >  13     *        *        *     Request timed out.
> >  14     *        *        *     Request timed out.
> >  ..
> >  30     *        *        *     Request timed out.
> > 
> > Trace complete.
> > 
> > ----------------------------------
> > 
> > TRACE #2:  Same trace, but this time when it's working.
> > 
> > C:\>tracert 66.166.71.243
> > 
> > Tracing route to geek.net [66.166.71.243]
> > over a maximum of 30 hops:
> > 
> >   1    21 ms    16 ms    15 ms  10.44.64.1
> >   2    10 ms    22 ms    11 ms  172.18.98.98
> >   3    10 ms    15 ms    11 ms  172.18.97.58
> >   4    13 ms    37 ms    14 ms  12.125.143.113
> >   5    15 ms    18 ms    18 ms  gbr2-a90s19.cgcil.ip.att.net [12.123.5.78]
> >   6    26 ms    15 ms    19 ms  tbr1-p013602.cgcil.ip.att.net [12.122.11.37]
> >   7    36 ms    39 ms    14 ms  ggr2-p310.cgcil.ip.att.net [12.123.6.65]
> >   8    34 ms    14 ms    37 ms  so-1-1-0.edge1.Chicago1.Level3.net [209.0.227.77]
> >   9    17 ms    14 ms    14 ms  so-2-1-0.bbr2.Chicago1.level3.net [209.244.8.13]
> >  10    17 ms    13 ms    14 ms  pos9-0.core1.Chicago1.level3.net [209.247.10.170]
> >  11    18 ms    15 ms    16 ms  gige6-2.ipcolo2.Chicago1.Level3.net [209.244.8.30]
> >  12    24 ms    27 ms    25 ms  unknown.Level3.net [209.247.226.26]
> >  13    30 ms    17 ms    23 ms  192.168.5.66
> >  14    49 ms    52 ms   102 ms  172.18.57.242
> >  15    91 ms    40 ms    39 ms  geek.net [66.166.71.243]
> > 
> > Trace complete.
> > 
> > -------------------
> > 
> > Trace #3:  Final trace, from Geek.NET back to my home broadband host 
> > (my home IP changed to 10.0.0.1 for this example).
> > 
> > traceroute to 10.0.0.1 (10.0.0.1), 30 hops max, 38 byte packets
> >  1  r-66-166-71-241.CHCGILGM.covad.net (66.166.71.241)  1.050 ms  0.938 ms  0.891 ms
> >  2  172.31.255.253 (172.31.255.253)  24.068 ms  26.558 ms  26.169 ms
> >  3  192.168.5.65 (192.168.5.65)  22.466 ms  23.301 ms  22.528 ms
> >  4  gigabitethernet8-0-131.ipcolo1.Chicago1.Level3.net (209.247.34.177)  23.638 ms  23.263 ms  22.539 ms
> >  5  gige5-1.core1.Chicago1.Level3.net (209.244.8.17)  22.243 ms  23.256 ms  22.528 ms
> >  6  so-4-0-0.bbr2.Chicago1.level3.net (209.247.10.169)  22.883 ms  22.522 ms  21.514 ms
> >  7  so-7-0-0.edge1.Chicago1.Level3.net (209.244.8.14)  23.624 ms  23.530 ms  23.884 ms
> >  8  att-Level3-oc48.Chicago1.Level3.net (209.0.227.78)  23.853 ms  22.426 ms  23.137 ms
> >  9  tbr2-p014001.cgcil.ip.att.net (12.123.6.70)  25.277 ms  25.311 ms  23.857 ms
> > 10  gbr6-p20.cgcil.ip.att.net (12.122.11.62)  24.244 ms  23.695 ms  24.001 ms
> > 11  gar2-p370.cgcil.ip.att.net (12.123.5.221)  23.892 ms  23.012 ms  23.858 ms
> > 12  12.125.142.122 (12.125.142.122)  27.939 ms  27.272 ms  28.703 ms
> > 13  * * *
> > 14  * * *
> > 15  10.0.0.1 (10.0.0.1)  40.235 ms  39.292 ms  38.271 ms
> > 
> > 
> > -------
> > 
> > Any thoughts or recommendations here?
> > 
> > - Robert
> > 




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