Possible Comcast Load Balancing issues in Chicago?

Metro-Inet Netops mi.netops at gmail.com
Thu May 15 15:10:16 UTC 2014

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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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