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  1. #1
    Join Date
    Nov 2003
    Posts
    58

    Upstream Router Packet Loss?

    Hi, I think Band-X has an upstream router that has latency issues.

    If you continuously ping aggr2.ntx1.band-x.net (216.128.66.61)
    Intermittently, the ping will spike to a very large number, then drop back down or it will timeout for 1 or 2 pings.

    Can you guys please verify this by continuously pinging it?

    If so, what could I do to get this issue resolved?

    It does not happen frequently enough so that a traceroute would show it, only pinging it constantly will show it but it is noticable when running latency sensitive programs.

    Thanks!

  2. #2
    Join Date
    Mar 2004
    Location
    Minnesota
    Posts
    1,274
    Yep, pinged it about 10 times and on the 6th one it started spiking to 200.
    hm what should I put in my sig?

  3. #3
    Join Date
    Apr 2004
    Posts
    338
    Ping statistics for: 216.128.66.61
    Packets: Sent = 1000 Received = 1000 Lost = 0
    Approximate round trip times in milli-seconds:
    Minimum = 120 Maximum = 50 Average = 53

    Only spiked up twice.

  4. #4
    Join Date
    Nov 2003
    Posts
    58
    Thanks!
    If you don't mind, could you provide a location?

    I am not sure what could be causing this but it does not seem to be region specific.

    I would appreciate it if someone knowledgable about upstream routers offered their insight.

  5. #5
    Join Date
    Nov 2003
    Posts
    58
    Originally posted by Cope
    Ping statistics for: 216.128.66.61
    Packets: Sent = 1000 Received = 1000 Lost = 0
    Approximate round trip times in milli-seconds:
    Minimum = 120 Maximum = 50 Average = 53

    Only spiked up twice.
    Did you copy/paste that or write it out?
    It does not make sense if the Minimum is 120ms and the Maximum is 50ms

  6. #6
    Join Date
    Apr 2004
    Posts
    338
    yeah blame the people in my IT department who made the tools we use.
    I can take screenshots of it if you would like?
    - http://xt10.net/images/stor1/pings.jpg
    Clicking Copy Results and thats what you get.

    This is from Oklahoma. trace is below.
    Tracing Route to 216.128.66.61:

    1 0 ms 0 ms 0 ms 10.13.35.3
    2 0 ms 0 ms 0 ms 10.41.21.9
    3 0 ms 0 ms 10 ms 10.13.252.1
    4 0 ms 0 ms 0 ms 66.210.131.1 cox-66-210-131-1.coxinet.net
    5 0 ms 0 ms 0 ms 66.210.132.9 fe8-0-0-bb4.coxinet.net
    6 10 ms 0 ms 0 ms 68.12.15.33 ip68-12-15-33.ok.ok.cox.net
    7 10 ms 0 ms 0 ms 68.1.0.108 mtc3bbrc02-pos0101.rd.ok.cox.net
    8 20 ms 10 ms 10 ms 68.1.0.111 mtc1bbrc02-pos0102.rd.om.cox.net
    9 20 ms 10 ms 20 ms 68.1.0.122 mtc1bbrc01-pos0100.rd.om.cox.net
    10 10 ms 20 ms 10 ms 12.125.72.49
    11 20 ms 20 ms 20 ms 12.122.2.218 gar1-p370.mpsmn.ip.att.net
    12 30 ms 30 ms 40 ms 12.122.2.222 tbr1-p012701.cgcil.ip.att.net
    13 30 ms 30 ms 30 ms 12.123.6.33 ggr2-p300.cgcil.ip.att.net
    14 40 ms 31 ms 30 ms 192.205.32.126 att-gw.chi.gblx.net
    15 40 ms 40 ms 40 ms 67.17.67.125 pos8-0-2488m.cr1.chi1.gblx.net
    16 50 ms 50 ms 50 ms 67.17.72.2 pos0-0-2488m.cr2.jfk1.gblx.net
    17 60 ms 50 ms 50 ms 67.17.72.18 so3-0-0-2488m.ar1.jfk1.gblx.net
    18 60 ms 50 ms 50 ms 216.128.66.61 aggr2.ntx1.band-x.net

    Trace Complete.
    Last edited by Cope; 06-01-2004 at 01:12 AM.

  7. #7

    Re: Upstream Router Packet Loss?

    Originally posted by Fibersnet
    Hi, I think Band-X has an upstream router that has latency issues.

    If you continuously ping aggr2.ntx1.band-x.net (216.128.66.61)
    Intermittently, the ping will spike to a very large number, then drop back down or it will timeout for 1 or 2 pings.
    spikes are normal if they are running cef. a couple timeouts are normal if they have icmp rate-limited. remember, you are pinging the mgmt interface, which is not at all the same as pinging past the hop (through the linecard, if you will). if you want to see if there is an actual problem, do a ping flood or run pingplotter against the next hop.

    paul
    * Rusko Enterprises LLC - Upgrade to 100% uptime today!
    * Premium NYC collocation and custom dedicated servers
    call 1-877-MY-RUSKO or paul [at] rusko.us

    dedicated servers, collocation, load balanced and high availability clusters

  8. #8
    Join Date
    Nov 2003
    Posts
    58
    Thanks guys

    Btw, Paul I tried pinging the routers past that router and then the final computer at the end, unfortunately, the ping spike occurs with all of them.

    I contacted band-x and they notified me that someone else was having this problem.

    Well its out of my hands now, just hope it is resolved quickly.

  9. #9
    fibersnet,

    allright, it is a real problem in that case =] all too often people do not understand cef and al the other issues involved and scream blue murder when there is no problem.

    paul
    * Rusko Enterprises LLC - Upgrade to 100% uptime today!
    * Premium NYC collocation and custom dedicated servers
    call 1-877-MY-RUSKO or paul [at] rusko.us

    dedicated servers, collocation, load balanced and high availability clusters

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