Ospf Latency

Posted on 2007-10-09
Last Modified: 2008-01-09
Please Read carefully only detailed answers.

We have three companies in a hub and spoke topology the main site has a router and the other two sites have routers that connect to the main site.  The type of routers are the Netvanta 1224str and the protocol we are using is Ospf with a bandwidth of 54mbs.  My problem is first of all when i do ping test to any of the other sites after about 30 pings at 1ms it spikes up to about 310ms and times out every once in a while then goes back to normal what could be wrong.  My second question is if my link can only transmit at 54mbs should i set my interface at 54mbs instead of leaving it at 100mbs.
Question by:NolanDorsett
    LVL 22

    Accepted Solution

    couple of things to check.

    1. ping tests aren't necessarily the most reliable. run a traceroute from the Adtran 1224STR and see exactly what node is bottlenecking your connection. it's doubtful that this is related to the OSPF routing. Could just be that one of the other routers is getting an update and is delaying the ping response while it handles that data. iperf is also a good test here to check your real throughput, run it from points at each of the three sites for a long period of time and see what kind of performance you get. This is far more reliable than a simple ping test. Ping is good for connectivity testing but not as a performance testing tool.

    2. as far as the interface speeds. What kind of WAN connectivity do you have between each site? 54 Mbps sounds like a good deal of bandwidth and I don't think the NV1224STR has any WAN interfaces bigger than a dual T1. They don't even have a DS3 card for it and that's less than a 52 meg pipe.

    Author Comment

    Where using ethernet interfaces that connect to the wireless radios from the adtran router

    Author Comment

    The adtran 1224str has ethernet interfaces these can handle 54mpbs

    Write Comment

    Please enter a first name

    Please enter a last name

    We will never share this with anyone.

    Featured Post

    IT, Stop Being Called Into Every Meeting

    Highfive is so simple that setting up every meeting room takes just minutes and every employee will be able to start or join a call from any room with ease. Never be called into a meeting just to get it started again. This is how video conferencing should work!

    Hello All, I have been training on Multicast for a while now and whenever I start the topic , I find out that my friends /  Colleagues mention that they do not know how to test Multicast Joins. As most of the multicast would be video traffic and …
    #Citrix #Citrix Netscaler #HTTP Compression #Load Balance
    Here's a very brief overview of the methods PRTG Network Monitor ( offers for monitoring bandwidth, to help you decide which methods you´d like to investigate in more detail.  The methods are covered in more detail in o…
    In this tutorial you'll learn about bandwidth monitoring with flows and packet sniffing with our network monitoring solution PRTG Network Monitor ( If you're interested in additional methods for monitoring bandwidt…

    759 members asked questions and received personalized solutions in the past 7 days.

    Join the community of 500,000 technology professionals and ask your questions.

    Join & Ask a Question

    Need Help in Real-Time?

    Connect with top rated Experts

    14 Experts available now in Live!

    Get 1:1 Help Now