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1023
rmang
join:2002-06-05
Colchester, CT

rmang

Member

[Connectivity] Odd IP block on Comcast network?

I'm not able to reach one specific IP from my home (216.38.5.19), with the trace stopping at the Comcast / Level 3 border. The next IP in the range (216.38.5.20) works fine, as does connecting from the Comcast route server. A reverse trace from 216.38.5.19 goes through fine to my home firewall.

Details shown below. Any thoughts of what the issue might be, or who I should contact at Comcast about this?

C:\Users\Rob Mangiafico>tracert 216.38.5.20
 
Tracing route to crystalclassics5.serverhost.net [216.38.5.20]
over a maximum of 30 hops:
 
  1     3 ms     1 ms     2 ms  10.0.0.1
  2     *        *        *     Request timed out.
  3    11 ms    11 ms     9 ms  te-5-3-ur01.bolton.ct.hartford.comcast.net [68.87.154.237]
  4    11 ms    13 ms    13 ms  be-23-ar01.chartford.ct.hartford.comcast.net [68.86.225.125]
  5    31 ms    18 ms    18 ms  he-3-0-0-0-ar01.needham.ma.boston.comcast.net [162.151.53.161]
  6    23 ms    22 ms    29 ms  be-7015-cr01.newyork.ny.ibone.comcast.net [68.86.90.217]
  7    21 ms    32 ms    21 ms  ae12.edge1.NewYork2.level3.net [4.68.127.1]
  8     *        *        *     Request timed out.
  9    40 ms    39 ms    38 ms  te-2-4.er1.Chi4.Servernap.net [66.252.3.161]
 10    41 ms    45 ms    39 ms  po-13.csr1.Chi3.Servernap.net [66.252.0.65]
 11    43 ms    43 ms    41 ms  te-9-1.ddr4.Chi3.Servernap.net [66.252.0.161]
 12    44 ms    49 ms    96 ms  crystalclassics5.serverhost.net [216.38.5.20]
 
Trace complete.
 
C:\Users\Rob Mangiafico>tracert 216.38.5.19
 
Tracing route to lexiconn5.serverhost.net [216.38.5.19]
over a maximum of 30 hops:
 
  1     7 ms     2 ms     4 ms  10.0.0.1
  2     *        *        *     Request timed out.
  3     9 ms    11 ms     9 ms  te-4-2-ur01.bolton.ct.hartford.comcast.net [68.87.154.233]
  4    17 ms    14 ms    19 ms  be-23-ar01.chartford.ct.hartford.comcast.net [68.86.225.125]
  5    17 ms    19 ms    17 ms  162.151.53.225
  6    23 ms    25 ms    24 ms  be-7015-cr01.newyork.ny.ibone.comcast.net [68.86.90.217]
  7    21 ms    23 ms    22 ms  ae12.edge1.NewYork2.level3.net [4.68.127.1]
  8     *        *        *     Request timed out.
  9     *        *        *     Request timed out.
 10     *        *        *     Request timed out.
 11     *        *        *     Request timed out.
 12     *        *        *     Request timed out.
 13     *        *        *     Request timed out.
 14     *        *        *     Request timed out.
 15     *        *        *     Request timed out.
 16     *        *        *     Request timed out.
 17     *        *        *     Request timed out.
 18     *        *        *     Request timed out.
 19     *        *        *     Request timed out.
 20     *        *        *     Request timed out.
 21     *        *        *     Request timed out.
 22     *        *        *     Request timed out.
 23     *        *        *     Request timed out.
 24     *        *        *     Request timed out.
 25     *        *        *     Request timed out.
 26     *        *        *     Request timed out.
 27     *        *        *     Request timed out.
 28     *        *        *     Request timed out.
 
 
 route-server.newyork.ny.ibone>traceroute 216.38.5.19
 
Type escape sequence to abort.
Tracing the route to lexiconn5.serverhost.net (216.38.5.19)
 
  1 te-1-4-0-7-102-cr01.newyork.ny.ibone.comcast.net (66.208.229.6) 4 msec 4 msec 4 msec
  2 ae12.edge1.NewYork2.level3.net (4.68.127.1) [AS 3356] 0 msec 4 msec 0 msec
  3  *  *  * 
  4 te-2-4.er1.Chi4.Servernap.net (66.252.3.161) [AS 23522] 32 msec 96 msec 72 msec
  5 po-13.csr1.Chi3.Servernap.net (66.252.0.65) [AS 23522] 20 msec 20 msec 56 msec
  6 te-9-1.ddr4.Chi3.Servernap.net (66.252.0.161) [AS 23522] 20 msec 20 msec 24 msec
  7 lexiconn5.serverhost.net (216.38.5.19) [AS 32181] 20 msec 48 msec 24 msec
route-server.newyork.ny.ibone>traceroute 216.38.5.20
 
Type escape sequence to abort.
Tracing the route to crystalclassics5.serverhost.net (216.38.5.20)
 
  1 te-1-4-0-7-102-cr01.newyork.ny.ibone.comcast.net (66.208.229.6) 4 msec 4 msec 4 msec
  2 ae12.edge1.NewYork2.level3.net (4.68.127.1) [AS 3356] 0 msec 0 msec 0 msec
  3  *  *  * 
  4 te-2-4.er1.Chi4.Servernap.net (66.252.3.161) [AS 23522] 20 msec 24 msec 20 msec
  5 po-13.csr1.Chi3.Servernap.net (66.252.0.65) [AS 23522] 20 msec 24 msec 20 msec
  6 te-9-1.ddr4.Chi3.Servernap.net (66.252.0.161) [AS 23522] 20 msec 24 msec 20 msec
  7 crystalclassics5.serverhost.net (216.38.5.20) [AS 32181] 24 msec 20 msec 24 msec
 

train_wreck
slow this bird down
join:2013-10-04
Antioch, TN
Cisco ASA 5506
Cisco DPC3939

train_wreck

Member

just as a data point, both are reachable for me from Nashville, TN.

PS C:\> ping -n 1 216.38.5.19
 
Pinging 216.38.5.19 with 32 bytes of data:
Reply from 216.38.5.19: bytes=32 time=30ms TTL=55
 
Ping statistics for 216.38.5.19:
    Packets: Sent = 1, Received = 1, Lost = 0 (0% loss),
Approximate round trip times in milli-seconds:
    Minimum = 30ms, Maximum = 30ms, Average = 30ms
PS C:\> tracert 216.38.5.19
 
Tracing route to lexiconn5.serverhost.net [216.38.5.19]
over a maximum of 30 hops:
 
  1    <1 ms    <1 ms    <1 ms  pLAN9-Gateway.pLAN9.site [172.16.16.1]
  2    30 ms    10 ms    28 ms  c-76-123-194-1.hsd1.tn.comcast.net [76.123.194.1]
  3    10 ms     7 ms    10 ms  68.85.50.193
  4    19 ms     7 ms     7 ms  xe-5-1-11-0-ar01.goodslettvll.tn.nash.comcast.net [68.86.176.57]
  5    18 ms    20 ms    18 ms  he-1-1-0-7-cr02.56marietta.ga.ibone.comcast.net [68.86.94.69]
  6    18 ms    19 ms    19 ms  be-11214-cr01.56marietta.ga.ibone.comcast.net [68.86.85.165]
  7    14 ms    18 ms    21 ms  23.30.207.98
  8     *        *        *     Request timed out.
  9    33 ms    33 ms    34 ms  te-2-4.er1.Chi4.Servernap.net [66.252.3.161]
 10    29 ms    33 ms    30 ms  po-13.csr1.Chi3.Servernap.net [66.252.0.65]
 11    29 ms    30 ms    31 ms  te-9-1.ddr4.Chi3.Servernap.net [66.252.0.161]
 12    26 ms    35 ms    33 ms  lexiconn5.serverhost.net [216.38.5.19]
 
Trace complete.
PS C:\> tracert 216.38.5.20
 
Tracing route to crystalclassics5.serverhost.net [216.38.5.20]
over a maximum of 30 hops:
 
  1    <1 ms    <1 ms    <1 ms  pLAN9-Gateway.pLAN9.site [172.16.16.1]
  2    43 ms    20 ms    27 ms  c-76-123-194-1.hsd1.tn.comcast.net [76.123.194.1]
  3    14 ms    10 ms     8 ms  68.85.50.193
  4    17 ms    24 ms    10 ms  xe-5-1-11-0-ar01.goodslettvll.tn.nash.comcast.net [68.86.176.57]
  5    18 ms    20 ms    23 ms  he-1-1-0-6-cr02.56marietta.ga.ibone.comcast.net [68.86.90.89]
  6    16 ms    19 ms    23 ms  be-11214-cr01.56marietta.ga.ibone.comcast.net [68.86.85.165]
  7    18 ms    18 ms    21 ms  23.30.207.98
  8     *       57 ms    98 ms  ae-18-3606.ear1.Chicago2.Level3.net [4.69.133.94]
  9    53 ms    35 ms    33 ms  te-2-4.er1.Chi4.Servernap.net [66.252.3.161]
 10    34 ms    31 ms    28 ms  po-13.csr1.Chi3.Servernap.net [66.252.0.65]
 11    31 ms    30 ms    32 ms  te-9-1.ddr4.Chi3.Servernap.net [66.252.0.161]
 12    31 ms    33 ms    27 ms  crystalclassics5.serverhost.net [216.38.5.20]
 
Trace complete.
 

as well, from the trace to .19, it looks like it's failing directly after a Level3 device....

Darknessfall
Premium Member
join:2012-08-17
Motorola MG8725
Asus RT-N66

Darknessfall

Premium Member

Same here, I can reach the one you're having issues with from CT with my Frontier connection.

traceroute to 216.38.5.19 (216.38.5.19), 30 hops max, 38 byte packets
1 * * *
2 * * *
3 32.223.104.185 (32.223.104.185) 23.863 ms 23.108 ms 32.223.104.181 23.605 ms
4 ae4---0.car02.wlfr.ct.frontiernet.net (74.40.71.101) 21.230 ms 20.703 ms 21.597 ms
5 ae11---0.cor01.asbn.va.frontiernet.net (74.40.5.217) 30.880 ms 30.480 ms 30.764 ms
6 ae1--0.cbr02.asbn.va.frontiernet.net (74.40.5.198) 30.852 ms 30.392 ms 30.594 ms
7 lag-5.ear1.Washington39.Level3.net (4.15.136.1) 31.359 ms 33.831 ms *
8 ae-17-3605.ear1.Chicago2.Level3.net (4.69.133.90) 73.654 ms 46.675 ms 104.176 ms
9 te-2-4.er1.Chi4.Servernap.net (66.252.3.161) 46.528 ms 46.508 ms 46.039 ms
10 po-13.csr1.Chi3.Servernap.net (66.252.0.65) 47.085 ms 46.939 ms 47.005 ms
11 te-9-1.ddr4.Chi3.Servernap.net (66.252.0.161) 47.327 ms 47.628 ms 47.620 ms
12 lexiconn5.serverhost.net (216.38.5.19) 46.950 ms 46.797 ms 46.732 ms

I can't tell you what your issue is, but figured I would post too.

graysonf
MVM
join:1999-07-16
Fort Lauderdale, FL

graysonf to rmang

MVM

to rmang
I can reach 216.38.5.19 from SE FL. It's running SSH-2.0-OpenSSH_4.3
rmang
join:2002-06-05
Colchester, CT

rmang

Member

Thanks for the points of data. I know another guy in CT that gets there fine as well. It was working fine this morning and then suddenly the route dropped for just my connection. I thought it was my firewall but it seems it's the connection between Comcast and Level 3 that drops the packets... Trying to figure out who I would contact to get this resolved...

camper
just visiting this planet
Premium Member
join:2010-03-21
Bethel, CT

camper to rmang

Premium Member

to rmang
Here's a traceroute from Comcast CT (though the other side of CT):

03/29/15 21:07:34 Fast traceroute 216.38.5.19
Trace 216.38.5.19 ...
1 10.20.1.1 0ms 0ms 0ms TTL: 64 (sentry ok)
2 96.120.64.73 7ms 6ms 8ms TTL:254 (No rDNS)
3 68.87.157.93 8ms 8ms 8ms TTL:253 (te-5-3-ur01.danbury.ct.hartford.comcast. net ok)
4 68.87.182.197 11ms 15ms 12ms TTL:252 (be-22-ar01.chartford.ct.hartford.comcast .net ok)
5 162.151.53.225 17ms 17ms 16ms TTL:251 (No rDNS)
6 68.86.90.217 25ms 24ms 22ms TTL:250 (be-7015-cr01.newyork.ny.ibone.comcast.ne t ok)
7 4.68.127.1 24ms 20ms 20ms TTL:247 (ae12.edge1.NewYork2.level3.net ok)
8 No Response * * *
9 66.252.3.161 40ms 40ms 39ms TTL:247 (te-2-4.er1.Chi4.Servernap.net bogus rDNS : host not found [authoritative])
10 66.252.0.65 40ms 40ms 40ms TTL:246 (po-13.csr1.Chi3.Servernap.net bogus rDNS : host not found [authoritative])
11 66.252.0.161 42ms 42ms 44ms TTL:245 (te-9-1.ddr4.Chi3.Servernap.net bogus rDN S : host not found [authoritative])
12 216.38.5.19 42ms 39ms 39ms TTL: 53 (lexiconn5.serverhost.net ok)


Napsterbater
Meh
MVM
join:2002-12-28
Milledgeville, GA
(Software) OPNsense
Ubiquiti UniFi UAP-AC-PRO

Napsterbater to rmang

MVM

to rmang
said by rmang:

I thought it was my firewall but it seems it's the connection between Comcast and Level 3 that drops the packets

No, its most likely neither, What ever device is droping ICMP at hop 8 (cant tell if it gets past) or the Servernap.net router at hop 9 (66.252.3.161) is probably droping the packets/conneciton.

Either way You are making it out of Comcast network.
Brocktoon
join:2009-08-11
Fairless Hills, PA

Brocktoon to rmang

Member

to rmang
Take a look at the following post on the Comcast forum:

»forums.comcast.com/t5/Ba ··· /2501581

That post also mentions

ae12.edge1.NewYork2.level3.net 4.68.127.1

I'm just outside Philly, and was also having issues connecting to a few IPs yesterday. I didn't have time to dig into the issue as it was late, but it did look like a level 3 issue for me as well

EDIT:

Here's another Comcast forum post I just saw:

»forums.comcast.com/t5/Ba ··· /2501555

The author mentions that the trace stops somewhere in New York ... my guess without seeing the trace is it's that level 3 connection as well
ryanduff
join:2015-03-30

ryanduff

Member

Been having the same issue since yesterday evening. York PA on Comcast. Noticed it when all images on twitter stopped loading. Traced to those domains and same as everyone else. Dies at Comcast/Level3

traceroute pbs.twimg.com
traceroute to wildcard-eb.twimg.com (199.96.57.7), 64 hops max, 52 byte packets
 1  10.25.1.1 (10.25.1.1)  2.241 ms  0.855 ms  0.739 ms
 2  174.60.112.1 (174.60.112.1)  38.185 ms  14.109 ms  26.667 ms
 3  te-9-2-ur01.manchester.pa.pitt.comcast.net (68.85.42.237)  12.019 ms  10.075 ms  11.235 ms
 4  te-0-13-0-4-ar03.lowerpaxton.pa.pitt.comcast.net (68.85.41.169)  14.661 ms  14.528 ms  12.533 ms
 5  he-0-15-0-1-ar01.pittsburgh.pa.pitt.comcast.net (69.139.195.173)  20.806 ms  18.745 ms  20.111 ms
 6  be-7016-cr01.newyork.ny.ibone.comcast.net (68.86.91.29)  28.853 ms  30.448 ms  28.803 ms
 7  ae12.edge1.newyork2.level3.net (4.68.127.1)  29.531 ms  29.614 ms  29.719 ms
 8  * * *
 
Brocktoon
join:2009-08-11
Fairless Hills, PA

Brocktoon to rmang

Member

to rmang
I'm not at my home computer, but I just checked with a neighbor who ran a trace on their home Comcast system and described the results over the phone ... guess what, problems at, you guessed it:

ae12.edge1.NewYork2.level3.net 4.68.127.1

So then what's the solution ???
ryanduff
join:2015-03-30

ryanduff

Member

Just got home from dropping kids off at school and it looks like this is now resolved. I'm not seeing any issues through level3 anymore.
rmang
join:2002-06-05
Colchester, CT

rmang

Member

Yes! Just saw the same thing a few minutes ago as well. Glad that it got resolved somehow.