Possible Comcast Load Balancing issues in Chicago?

Smith, Courtney Courtney_Smith at Cable.Comcast.com
Thu May 15 17:28:25 UTC 2014


Mark,

Faulty circuit was removed from path.  NOC is working with TATA(AS6453) to repair.  Thanks.


Courtney Smith
Network Engineer
Comcast
http://www.comcastwholesale.com/



-----Original Message-----
From: Mark Mayfield [mailto:Mark.Mayfield at metro-inet.us] 
Sent: Thursday, May 15, 2014 12:04 PM
To: Smith, Courtney; Metro-Inet Netops
Cc: nanog at nanog.org
Subject: RE: Possible Comcast Load Balancing issues in Chicago?

Seems to have cleared up about 30 minutes ago.

Thanks,

Mark Mayfield
City of Roseville – AS 54371
Network Systems Engineer

2660 Civic Center Drive
Roseville, MN 55113
651-792-7098      Office

-----Original Message-----
From: NANOG [mailto:nanog-bounces at nanog.org] On Behalf Of Smith, Courtney
Sent: Thursday, May 15, 2014 10:32 AM
To: Metro-Inet Netops
Cc: nanog at nanog.org
Subject: RE: Possible Comcast Load Balancing issues in Chicago?

Looking into.  

-----Original Message-----
From: NANOG [mailto:nanog-bounces at nanog.org] On Behalf Of Metro-Inet Netops
Sent: Thursday, May 15, 2014 11:10 AM
To: nanog at nanog.org
Subject: Possible Comcast Load Balancing issues in Chicago?

It’s possible I’m missing something, but it looks like traffic from Comcast business customers in the Minneapolis/St. Paul area is not all making it through Chicago to my VPN endpoints.  Testing to some of my address space from one of the Comcast remote VPN sites, I can get to some numbers and not others (odds/evens switch roles depending on the block I trace) fall apart hopping though Chicago.  Testing to the same addresses from the HE looking glass, everything seems fine.



Any input or even knowledge that it’s being worked on would be appreciated.  Traceroutes below:



Fails:



HUGO-CH-2921#trace 199.249.109.13

Type escape sequence to abort.

Tracing the route to vpn.metro-inet.us (199.249.109.13)

VRF info: (vrf in name/id, vrf out name/id)

  1 75-149-158-38-minnesota.hfc.comcastbusiness.net (75.149.158.38) 0 msec
0 msec 0 msec

  2 73.237.168.1 12 msec 12 msec 16 msec

  3 te-4-2-ur02.whitebear.mn.minn.comcast.net (68.85.167.37) 16 msec 16 msec 16 msec

  4 te-2-1-ur02.oakdale.mn.minn.comcast.net (68.87.174.138) 16 msec 16 msec
16 msec

  5 te-8-3-ur01.oakdale.mn.minn.comcast.net (68.87.174.109) 20 msec 12 msec
16 msec

  6 te-0-3-0-5-ar01.crosstown.mn.minn.comcast.net (69.139.176.61) 16 msec
16 msec 20 msec

  7 pos-0-0-0-0-ar01.roseville.mn.minn.comcast.net (68.87.174.194) 16 msec
16 msec 12 msec

  8 he-1-12-0-0-cr01.350ecermak.il.ibone.comcast.net (68.86.94.77) 24 msec
24 msec 28 msec

  9  *  *  *

10  *



Gets Through:



HUGO-CH-2921#trace 199.249.109.14

Type escape sequence to abort.

Tracing the route to 199.249.109.14

VRF info: (vrf in name/id, vrf out name/id)

  1 75-149-158-38-minnesota.hfc.comcastbusiness.net (75.149.158.38) 4 msec
0 msec 0 msec

  2 73.237.168.1 8 msec 12 msec 8 msec

  3 te-4-2-ur01.whitebear.mn.minn.comcast.net (68.85.167.33) 12 msec 12 msec 12 msec

  4 te-2-1-ur02.shoreview.mn.minn.comcast.net (68.87.174.129) 8 msec 12 msec 12 msec

  5 te-8-3-ur01.shoreview.mn.minn.comcast.net (68.87.174.125) 12 msec 8 msec 8 msec

  6 te-0-3-0-6-ar01.roseville.mn.minn.comcast.net (68.87.174.178) 12 msec
12 msec 12 msec

  7 he-1-11-0-0-cr01.350ecermak.il.ibone.comcast.net (68.86.94.73) 28 msec
20 msec 24 msec

  8 ix-7-0-3-0.tcore1.CT8-Chicago.as6453.net (64.86.137.33) 16 msec 16 msec
20 msec

  9 206.82.141.90 20 msec 20 msec 20 msec

10 hurricane-ic-124397-chi-bb1.c.telia.net (213.248.104.214) 24 msec 24 msec 28 msec

11 100ge13-1.core1.msp1.he.net (184.105.223.178) 36 msec 24 msec 28 msec

12 city-of-roseville.gigabitethernet3-8.core1.msp1.he.net (184.105.249.218)
28 msec 28 msec 24 msec

13 199.249.109.227 28 msec 24 msec 28 msec



Gets Through:



HUGO-CH-2921#trace 67.88.181.25

Type escape sequence to abort.

Tracing the route to ip67-88-181-25.z181-88-67.customer.algx.net(67.88.181.25)

VRF info: (vrf in name/id, vrf out name/id)

  1 pubwp.comcast.net (75.149.158.38) 0 msec 0 msec 0 msec

  2 73.237.168.1 8 msec 8 msec 8 msec

  3 te-4-2-ur01.whitebear.mn.minn.comcast.net (68.85.167.33) 12 msec 12 msec 8 msec

  4 te-2-1-ur02.shoreview.mn.minn.comcast.net (68.87.174.129) 8 msec 8 msec
12 msec

  5 te-8-3-ur01.shoreview.mn.minn.comcast.net (68.87.174.125) 12 msec 12 msec 8 msec

  6 te-0-3-0-6-ar01.roseville.mn.minn.comcast.net (68.87.174.178) 8 msec 12 msec 12 msec

  7 he-1-12-0-0-cr01.350ecermak.il.ibone.comcast.net (68.86.94.77) 24 msec
20 msec 16 msec

  8 ix-2-3-0-0.tcore1.CT8-Chicago.as6453.net (64.86.137.41) 24 msec 16 msec
40 msec

  9 p5-1.ir1.chicago2-il.us.xo.net (206.111.2.33) 68 msec 20 msec 80 msec

10 207.88.14.193.ptr.us.xo.net (207.88.14.193) 32 msec 32 msec 36 msec

11 ae0d0.mcr1.minneapolis-mn.us.xo.net (216.156.0.170) 28 msec 28 msec 28 msec



Fails:



HUGO-CH-2921#trace 67.88.181.26

Type escape sequence to abort.

Tracing the route to webvpn.metro-inet.us (67.88.181.26)

VRF info: (vrf in name/id, vrf out name/id)

  1 pubwp.comcast.net (75.149.158.38) 0 msec 0 msec 0 msec

  2 73.237.168.1 8 msec 8 msec 8 msec

  3 te-4-2-ur02.whitebear.mn.minn.comcast.net (68.85.167.37) 8 msec 12 msec
8 msec

  4 te-2-1-ur02.oakdale.mn.minn.comcast.net (68.87.174.138) 8 msec 12 msec
20 msec

  5 te-8-3-ur01.oakdale.mn.minn.comcast.net (68.87.174.109) 8 msec 8 msec
12 msec

  6 te-0-3-0-5-ar01.crosstown.mn.minn.comcast.net (69.139.176.61) 12 msec
12 msec 12 msec

  7 pos-0-1-0-0-ar01.roseville.mn.minn.comcast.net (68.87.174.2) 8 msec 8 msec 12 msec

  8 he-1-13-0-0-cr01.350ecermak.il.ibone.comcast.net (68.86.94.81) 24 msec
24 msec 20 msec

  9  *  *  *

10  *  *  *

11  *  *  *

12  *  *  *



Gets Through:



HUGO-CH-2921#trace 67.88.181.27

Type escape sequence to abort.

Tracing the route to ip67-88-181-27.z181-88-67.customer.algx.net(67.88.181.27)

VRF info: (vrf in name/id, vrf out name/id)

  1 pubwp.comcast.net (75.149.158.38) 4 msec 0 msec 4 msec

  2 73.237.168.1 8 msec 12 msec 8 msec

  3 te-4-2-ur02.whitebear.mn.minn.comcast.net (68.85.167.37) 12 msec 12 msec 8 msec

  4 te-8-3-ur01.whitebear.mn.minn.comcast.net (68.87.174.133) 12 msec 12 msec 4 msec

  5 te-2-1-ur02.shoreview.mn.minn.comcast.net (68.87.174.129) 8 msec 12 msec 8 msec

  6 te-8-3-ur01.shoreview.mn.minn.comcast.net (68.87.174.125) 16 msec 8 msec 8 msec

  7 te-0-3-0-6-ar01.roseville.mn.minn.comcast.net (68.87.174.178) 12 msec
12 msec 16 msec

  8 he-1-13-0-0-cr01.350ecermak.il.ibone.comcast.net (68.86.94.81) 20 msec
20 msec 20 msec

  9 ix-2-2-1-0.tcore1.CT8-Chicago.as6453.net (64.86.137.37) 16 msec 16 msec
16 msec

10 p5-1.ir1.chicago2-il.us.xo.net (206.111.2.33) 32 msec 72 msec 96 msec

11 207.88.14.193.ptr.us.xo.net (207.88.14.193) 36 msec 32 msec 32 msec

12 ae0d0.mcr1.minneapolis-mn.us.xo.net (216.156.0.170) 28 msec 28 msec 32 msec

13  *  *  *



Fails:



HUGO-CH-2921#trace 67.88.181.28

Type escape sequence to abort.

Tracing the route to ip67-88-181-28.z181-88-67.customer.algx.net(67.88.181.28)

VRF info: (vrf in name/id, vrf out name/id)

  1 pubwp.comcast.net (75.149.158.38) 0 msec 0 msec 0 msec

  2 73.237.168.1 12 msec 8 msec 12 msec

  3 te-4-2-ur01.whitebear.mn.minn.comcast.net (68.85.167.33) 8 msec 8 msec
8 msec

  4 te-2-1-ur02.shoreview.mn.minn.comcast.net (68.87.174.129) 8 msec 8 msec
12 msec

  5 te-8-3-ur01.shoreview.mn.minn.comcast.net (68.87.174.125) 12 msec 8 msec 8 msec

  6 te-0-3-0-6-ar01.roseville.mn.minn.comcast.net (68.87.174.178) 12 msec
12 msec 12 msec

  7 he-1-11-0-0-cr01.350ecermak.il.ibone.comcast.net (68.86.94.73) 20 msec
20 msec 20 msec

  8  *  *  *

  9  *  *  *

10  *



Mark Mayfield

City of Roseville – AS 54371

Network Systems Engineer



2660 Civic Center Drive

Roseville, MN 55113

651-792-7098      Office


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