traceroute & ping - SCO

This is a discussion on traceroute & ping - SCO ; 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 ...

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Thread: traceroute & ping

  1. traceroute & ping

    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...


    --
    JP
    ==> http://www.frappr.com/cusm <==

  2. Re: traceroute & ping

    In article <20060223213320.GA2609@jpradley.jpr.com>,
    Jean-Pierre Radley 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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