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plencnerb
Premium
join:2000-09-25
Carpentersville, IL
kudos:3
reply to johnnn

Re: Routing Change in SE Mich.: No more router hostnames

Not sure if its the same thing, but if I do a trace to www.msu.edu, I get a few hops with no information.

tracert www.msu.edu
 
Tracing route to www.msu.edu [35.8.10.140]
over a maximum of 30 hops:
 
  1    <1 ms    <1 ms    <1 ms  pfsense.localdomain [192.168.1.1]
  2    28 ms    29 ms    29 ms  24.13.16.1
  3    11 ms    40 ms    11 ms  te-9-1-ur04.algonquin.il.chicago.comcast.net [68.87.229.189]
  4    11 ms    92 ms    15 ms  te-0-3-0-2-ar01.area4.il.chicago.comcast.net [68.86.189.229]
  5    18 ms    23 ms    23 ms  he-3-6-0-0-cr01.350ecermak.il.ibone.comcast.net [68.86.95.9]
  6     *        *        *     Request timed out.
  7    16 ms    45 ms    16 ms  66.208.228.142
  8    19 ms    21 ms    21 ms  xe-0-0-0x14.msu6.mich.net [198.108.22.10]
  9     *        *        *     Request timed out.
 10    21 ms    23 ms    22 ms  core-srx-xe000-1.net.msu.edu [35.9.100.131]
 11    38 ms    24 ms    23 ms  core-mx-xe220-1.net.msu.edu [35.9.100.128]
 12    25 ms    24 ms    25 ms  dc-core-fw-v1012.net.msu.edu [35.9.108.23]
 13    24 ms    24 ms    25 ms  www.msu.edu [35.8.10.140]
 
Trace complete.
 
 

I actually thought there was some kind of setting in the routers or switches along the way that either blocked (or maybe the better word is turned off) ICMP requests (like ping, nslookup, etc). If that's the case, sure it sucks to try to troubleshoot something, but I don't see it as an abnormal or drastic change to how things work.

--Brian

--
============================
--Brian Plencner

E-Mail: CoasterBrian72Cancer@gmail.com
Note: Kill Cancer to Reply via e-mail

johnnn

join:2007-01-25
Ypsilanti, MI
Hop 14 (in your trace) has always timed out (MSU's Intrusion Prevention System architecture, if I remember right). Hop 6, which sits between two Comcast IP addresses, never used to. Also, look at your hops 3 and 4. They help you determine your area router's architecture (namely, that there are 10GigE ports between you and hop 10). The same routers in my area now have no DNS resolution for some reason. That's what I'm trying to figure out!