Sorry for the off-topic post...
*
I like to think of myself as someone who has a pretty good grasp on
routing, but tonight I came across something which I didn't understand.
I'd appreciate it if someone could explain this one to me.
*
I was trying to connect to www.CIAC.com, but the browser was just
sitting there hanging trying to connect and eventually reported the
operation timed out. So I did a tracert to it and around hop 15, the
tracert started looping between two routers.
*
15 130 ms 151 ms 140 ms tpa-max.THOUGHTPORT.NET [206.41.176.10]
16 130 ms 140 ms 140 ms CHI-Cisco01.thoughtport.COM
[199.171.236.1]
17 190 ms 140 ms 141 ms tpa-max.THOUGHTPORT.NET [206.41.176.10]
18 130 ms 140 ms 140 ms CHI-Cisco01.thoughtport.COM
[199.171.236.1]
19 150 ms 160 ms 150 ms tpa-max.THOUGHTPORT.NET [206.41.176.10]
20 140 ms 160 ms 140 ms CHI-Cisco01.thoughtport.COM
[199.171.236.1]
21 140 ms 150 ms 150 ms tpa-max.THOUGHTPORT.NET [206.41.176.10]
22 151 ms 160 ms 140 ms CHI-Cisco01.thoughtport.COM
[199.171.236.1]
23 141 ms 160 ms 160 ms tpa-max.THOUGHTPORT.NET [206.41.176.10]
24 140 ms 130 ms 150 ms CHI-Cisco01.thoughtport.COM
[199.171.236.1]
25 150 ms 161 ms 140 ms tpa-max.THOUGHTPORT.NET [206.41.176.10]
26 140 ms 181 ms 170 ms CHI-Cisco01.thoughtport.COM
[199.171.236.1]
27 160 ms 161 ms 180 ms tpa-max.THOUGHTPORT.NET [206.41.176.10]
28 200 ms 171 ms 150 ms CHI-Cisco01.thoughtport.COM
[199.171.236.1]
29 160 ms 181 ms 350 ms tpa-max.THOUGHTPORT.NET [206.41.176.10]
30 190 ms 251 ms 240 ms CHI-Cisco01.thoughtport.COM
[199.171.236.1]
*
So I get the Thoughtport Tech Admin on the phone (4:00am and he's in
his office, and he's answering his phone???). I tell him what's up, and
he says that if CIAC is down, then this type of action would be
normal???
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Normal? I don't understand, why would two routers be pointing to each
other just because a route is down? Maybe its something real basic that
I'm missing here because I figured there was a problem, but I just
can't figure out why they would be pointing to each other and not
simply timing out. Is this the type of stuff we can look forward to
when we have redundant routes and parallel Firewalls?
*
Cheers,
Russ
R.C. Consulting, Inc. - NT/Internet Security Consulting
mailto:Russ .
Cooper @
RC .
on .
ca <-- *note the new address*
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