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 Administrative / General / 3037
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Subject: 
Re: Sluggish nntp performance
Newsgroups: 
lugnet.admin.general
Date: 
Sun, 10 Oct 1999 17:51:00 GMT
Reply-To: 
JSPROAT@IOantispam.COM
Viewed: 
360 times
  
Todd Lehman wrote:
As far as I can tell, it's some sort of ISP networking traffic thing...?
Pinging www.lugnet.com reports "Request timed out" at the sames times that
pinging www.pair.com reports the same, while pinging other sites like
www.yahoo.com and www.netscape.com report normal replies.  What do you see
when you ping?

traceroute was taken during ho-hum performance; I'll take another one during
really flaky performance.

<PING>
c:\pub>ping lugnet.com

Pinging lugnet.com [209.68.63.236] with 32 bytes of data:

Reply from 209.68.63.236: bytes=32 time=60ms TTL=244
Reply from 209.68.63.236: bytes=32 time=50ms TTL=244
Reply from 209.68.63.236: bytes=32 time=60ms TTL=244
Reply from 209.68.63.236: bytes=32 time=51ms TTL=244
</PING>

And a traceroute.  NOTE:  Novell router addresses kifed by paraoid policy of
Novell IS&T.

<TRACEROUTE>
c:\pub>tracert lugnet.com

Tracing route to lugnet.com [209.68.63.236]
over a maximum of 30 hops:

  1   <10 ms   <10 ms   <10 ms  #############.###.novell.com [137.65.###.###]
  2   <10 ms   <10 ms   <10 ms  #############.###.novell.com [137.65.###.###]
  3   <10 ms   <10 ms   <10 ms  #############.###.novell.com [137.65.###.###]
  4   <10 ms   <10 ms   <10 ms  #############.###.novell.com [137.65.###.###]
  5   <10 ms   <10 ms    10 ms  Serial5-1-1.GW1.SLT1.ALTER.NET
[157.130.162.77]
  6   <10 ms   <10 ms    10 ms  137.39.167.101
  7   <10 ms   <10 ms    10 ms  195.ATM2-0.TR1.SLT3.ALTER.NET [146.188.224.2]
  8    41 ms    50 ms    50 ms  113.ATM6-0.TR1.DCA1.ALTER.NET
[146.188.137.209]
  9    40 ms    50 ms    50 ms  199.ATM7-0.XR1.DCA1.ALTER.NET
[146.188.161.133]
10    50 ms    70 ms    70 ms  193.ATM8-0-0.GW1.PIT1.ALTER.NET
[146.188.162.81]
11    50 ms    61 ms    60 ms  pairnetworks-gw.customer.ALTER.NET
[157.130.32.178]
12     *        *        *     Request timed out.
13    60 ms    60 ms    61 ms  lugnet.com [209.68.63.236]

Trace complete.
</TRACEROUTE>

That router #12 always times out.  I'm sure it just means that it's set up to
not respond to ping from outside the firewall...

LUGNET.COM responds to ping fairly quickly, as always.

p.s.  HTTP, unlike NNTP, is stateless, so it's a lot easier for NNTP
connections to drop and cause headaches than HTTP.  Your web browser might
also have higher TCP/IP timeouts or latency tolerances than your newsreader.

Hmmm...  I haven't thought of this.  Monday when I'm at work again, I'll put a
packet sniffer on it and see if I'm getting a lot of timeouts...

Cheers,
- jsproat

--
Jeremy H. Sproat <jsproat@io.com> ~~~ http://www.io.com/~jsproat/
Jeremy: "Hi, My name is Jeremy Sproat, and I'm a...Slashdot Lemming."
All:    "Hi, Jeremy."



Message has 2 Replies:
  Re: Sluggish nntp performance
 
(...) traceroute taken during bad performance showed about the same times. <TRACEROUTE> c:\pub>tracert lugnet.com Tracing route to lugnet.com [209.68.63.236] over a maximum of 30 hops: 1 <10 ms <10 ms <10 ms ###...###.###.novell.com [137.65.###.###] (...) (25 years ago, 11-Oct-99, to lugnet.admin.general)
  Re: Sluggish nntp performance
 
Time to connect is now up to 38 seconds. Doesn't seem to ever be better or worse, consistently 30+ seconds. Tracert looks pretty good, 6 alter.net routers to pairnetworks and they pass through very quick. Losing about 10% of the packets pinging (...) (25 years ago, 11-Oct-99, to lugnet.admin.general)

Message is in Reply To:
  Re: Sluggish nntp performance
 
(...) Something really net.weird is going on today, but I don't see special notices at Pair yet: (URL) I'm seeing when I look inward from the outside is lots and lots of packet drops and broken connections. Yesterday was bad too, but today is really (...) (25 years ago, 8-Oct-99, to lugnet.admin.general)

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