Re: traceroute & ping
- From: bv@xxxxxxx (Bill Vermillion)
- Date: Fri, 24 Feb 2006 15:15:01 GMT
In article <20060223213320.GA2609@xxxxxxxxxxxxxxxx>,
Jean-Pierre Radley <jpr@xxxxxxx> wrote:
OSR 6.0.0 + MP1
'traceroute' first get three replies from myself.
# traceroute www.mit.edu
traceroute to www.mit.edu (18.7.22.83), 30 hops max, 40 byte packets
1 jpradley (66.167.21.66) 0.360 ms 0.305 ms 0.203 ms
2 jpradley (66.167.21.66) 0.250 ms 8.047 ms 0.000 ms
3 jpradley (66.167.21.66) 0.385 ms 0.335 ms 0.491 ms
4 ge-6-1.car4.NewYork.Level3.net (63.214.53.141) 84.023 ms .....
Ping is also strange: I get scads of DUPS for each ping:
ping -c 2 www.mit.edu
PING www.mit.edu (18.7.22.83): 56 data bytes
64 bytes from WWW.MIT.EDU (18.7.22.83): icmp_seq=0 ttl=246 time=283.524 ms
64 bytes from WWW.MIT.EDU (18.7.22.83): icmp_seq=0 ttl=246 time=438.660 ms (DUP)
64 bytes from WWW.MIT.EDU (18.7.22.83): icmp_seq=0 ttl=246 time=438.713 ms (DUP)
64 bytes from WWW.MIT.EDU (18.7.22.83): icmp_seq=0 ttl=246 time=438.689 ms (DUP)
... more of those...
--- www.mit.edu ping statistics ---
2 packets transmitted, 2 packets received, +29 duplicates, 0% packet loss
round-trip min/avg/max = 15.594/420.949/442.678 ms
I cannot recall when I last used either traeroute or ping; it may be
since Covad replaced my router a couple of weeks ago...
I've seen this only a couple of times and AFAIR one was when the
packets were coming back via different routes
If you ping support -R [Record Route] you can see what interfaces
the packets are returning on.
The last time I saw this Sprint [my provider was having problems]
and one time when I was getting 5SECOND+ returns, I called Level 3
- where my servers are - as I thought it might be a problem there,
and they checked and found an asymetric return route.
My packets were going out through Dallas/FtWorth, to Orlando, and
being returned via Washington DC.
But I'd be concernced about your router at this point since
this appears to have co-incided with this.
PS. -R won't work with a lot of providers - Sprint blocks them
on my local DSL - but it can be handy tool when you have it.
The limitation is as I recall 8 hops - as the informatin is stored
in the headers.
Bill
--
Bill Vermillion - bv @ wjv . com
.
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- From: Jean-Pierre Radley
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