Is an OC3 and OC3 is an OC3?

Posted on 2012-08-20
Last Modified: 2012-11-09
I have a radiology application that ships large files around the network.  Currently we have an OC3 connecting the ASP Data Center to the corp network.  These two locations are in the city ~20 miles away from each other.  If we move the app to a corp hub 2000 miles away and connect it with an OC3 would we have the same app performance?  Distance does not change the Mbps so I would assume the app would run the same.  The app vendor is pushing back on the scenario citing latency.  Is that reasonable?  I would think that 155.52Mbps is that same no matter how far apart the two sites are right?
Question by:jchri66
    LVL 82

    Accepted Solution

    The link speed is the same but the number of hops to get there is different.  I would assume an increase in latency because of that.  A similar thing can be seen with web sites when accessed from different locations.  I use Uptrends to check the load time from different places.  You can check a site that is known to be in San Jose from San Francisco and from New York and see that there is a difference.
    LVL 6

    Expert Comment

    You would still have the same throughput to the tier 1 backbone, but latency definitely could effect performance.  With distance comes hops, which adds latency.  Unless you have 2000 miles of fiber directly connecting the two sites. :-)  Could you test the performance at the new data center vs the current one to get an accurate comparison of throughput?
    LVL 6

    Expert Comment

    If you are simply pushing files around, though, why is latency a problem? Is your application especially sensitive to latency? Typically this becomes a problem for real-time applications like streaming media or VoIP. I would ask the ISP for their SLA on Latency and compare it to the application's requirements.


    Featured Post

    Better Security Awareness With Threat Intelligence

    See how one of the leading financial services organizations uses Recorded Future as part of a holistic threat intelligence program to promote security awareness and proactively and efficiently identify threats.

    Join & Write a Comment

    Suggested Solutions

    This article is a step by step guide on how to create a basic PTP link using Ubiquiti airOS devices. This guide can be used on the following Ubiquiti AirMAX devices. Nanostation, Bullets, AirBridge, Nanobeam, NanoBridge to name a few. Please review …
    In the world of WAN, QoS is a pretty important topic for most, if not all, networks. Some WAN technologies have QoS mechanisms built in, but others, such as some L2 WAN's, don't have QoS control in the provider cloud.
    After creating this article (, I decided to make a video (no audio) to show you how to configure the routers and run some trace routes and pings between the 7 sites…
    After creating this article (, I decided to make a video (no audio) to show you how to configure the routers and run some trace routes and pings between the 7 sites…

    746 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

    19 Experts available now in Live!

    Get 1:1 Help Now