[outages] Intermittent Level 3 outage/connectivity issues on Dallas edges?

[Chris Boulton]

Thanks, I am aware of what the traceroute shows and how a traceroute works.
The intent of the traceroute was primarily to show where I see our paths
between Level 3 and TW Telecom converge.

Plain and simple - we are experiencing connectivity issues over our Level 3
connection, which we're not seeing over our TW Telecom connection for
traffic destined to the same location.

Regards,

Chris Boulton
Bigcommerce

Email: chris at bigcommerce.com

Web: http://www.bigcommerce.com/


On Fri, Jan 25, 2013 at 6:11 AM, Jeremy Chadwick <jdc at koitsu.org> wrote:

> Please see my below post on this matter, which I posted only 2 days ago:
>
> https://puck.nether.net/pipermail/outages/2013-January/005111.html
>
> What you've shown in your mtr does not show any issue of any kind with
> Level 3.  The packet loss shown at hops 4/5/6 does not "trickle down"
> each subsequent hop (look at hop 7 onward for proof), nor is there any
> sign of latency increase either.
>
> On the other hand, the 2nd mtr you provided shows some degree of packet
> loss starting at hop 2 (TW Telecom) which *does* "trickle down" through
> all subsequent hops (egress).  If you want to know how many packets were
> lost, look at the --order flag to mtr (I recommend --order=LSRNABW).
>
> Plain and simple: talk to TW Telecom about the loss in their network.
>
> --
> | Jeremy Chadwick                                   jdc at koitsu.org |
> | UNIX Systems Administrator                http://jdc.koitsu.org/ |
> | Mountain View, CA, US                                            |
> | Making life hard for others since 1977.             PGP 4BD6C0CB |
>
> On Fri, Jan 25, 2013 at 05:46:27AM +1100, Chris Boulton wrote:
> > Seeing connectivity issues as traffic passes through Level 3 in Dallas -
> > not seeing the same issues for where routes converge (above.net in DFW)
> > over our TW Telecom link.
> >
> > Anybody else experiencing this as well?
> >
> > Level 3:
> >
> >  Host                                                     Loss%   Snt
> > Last   Avg  Best  Wrst StDev
> >  1. vlan358.car1.Houston1.Level3.net                       0.0%   167
> >  105.9  80.5  31.7 276.4  59.8
> >  2. ae-2-5.bar1.Houston1.Level3.net                        0.0%   167
> > 32.5  34.6  32.2  93.8   7.3
> >  3. ae-13-13.ebr1.Dallas1.Level3.net                       0.0%   167
> > 39.5  37.4  36.7  41.2   0.9
> >  4. ae-91-91.csw4.Dallas1.Level3.net                      65.1%   167
> > 44.5  43.5  39.7  53.8   4.0
> >  5. ae-4-90.edge2.Dallas3.Level3.net                       5.4%   166
> > 37.1  37.9  36.1  75.6   5.1
> >  6. ex-3-1-0.er1.dfw2.us.above.net                        66.1%   166
> > 39.5  43.5  38.9 104.8  12.5
> >  7. xe-3-1-0.cr1.dfw2.us.above.net                         0.0%   166
> > 37.3  40.4  37.0 114.1  10.6
> >  8. xe-0-0-0.er3.dfw2.us.above.net                         0.0%   166
> > 36.2  39.8  36.1  99.3  10.2
> >
> >  Host                                                     Loss%   Snt
> > Last   Avg  Best  Wrst StDev
> >  1. 50.58.18.1                                             0.0%   829
> >  4.3  23.9   4.1 121.2  14.5
> >  2. dal2-pr2-xe-0-3-0-0.us.twtelecom.net                   0.1%   829
> > 55.4  31.2   9.4 121.0  17.2
> >     dal2-pr2-xe-2-3-0-0.us.twtelecom.net
> >  3. xe-3-0-0.er2.dfw2.us.above.net                         0.1%   829
> > 44.8  31.6   9.5 143.7  17.9
> >  4. xe-0-1-0.cr2.dfw2.us.above.net                         0.2%   829
> > 40.5  31.2  10.3 116.2  15.9
> >     xe-3-0-0.cr2.dfw2.us.above.net
> >  5. xe-0-2-0.er3.dfw2.us.above.net                         0.2%   829
> > 42.7  32.4   9.6 109.2  16.5
> >
> >
> >
> > Regards,
> >
> > Chris Boulton
> > Bigcommerce
> >
> > Email: chris at bigcommerce.com
> >
> > Web: http://www.bigcommerce.com/
>
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