Cisco NAS using Link Aggregation is only copying at 120 Kb/s why?

Posted on 2011-10-28
Last Modified: 2012-05-12
Bought a Cisco "NSS 324 Smart Storage" NAS, and installed it.

I connect it to a SLM2048 Cisco smart switch, and followed (to the best of my knowledge) the very simple step in setting up a LAG.

I included the images of the settings, hope that there is something wrong there that would explain the slow copy speeds.

 SLM2048 port settingsPort setting SLM2048

 NAS Settings
Port setting details

Details port settingsPort settings NAS
Question by:somewhereinafrica
    LVL 17

    Accepted Solution

    How are the switchports configured. If they are not setup as a port Channel or a possible trunk you may be running into mac flapping and the switch does not know which one to use since it is constantly seeing the same mac show up on two different ports.  Generally you would set them up as a port channel if you want faster throughput and as a trunk if you want redundancy.  The LAG should assign the pair a single MAC and if it flaps every time the table is update it will create more overhead.
    LVL 17

    Assisted Solution

    It may also be negotiation you are telling it to use max capacity but you have the switch it looks like set to static 1000 full.  Make sure the speed and duplex matches on all devices.

    Author Comment

    how do I check your first issue?

    As you can see on my included image, not that much I can really change that would make much difference. I will try to change the setting, not holding my breath though.

    I changed from round robin to the XO setting as pictured, this bumped the speed up a little.

    Shouldn't this be pretty simple?
    LVL 17

    Assisted Solution

    It should be but one thing to try maybe would be to turn off all of the LAG settings and use a single connection and see if the speed increases.  Since you are getting nowhere near what a single link should run even.  If you do that then we can try to build the LAG from the ground up.
    LVL 17

    Assisted Solution

    The first part you are looking for something in the swtich that pertain to channel group I usually use IOS and am not sure where it is in that switch type.

    Author Closing Comment

    Did said exercises, restarted, it worked.

    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!

    We wanted to provide an in-depth explanation of the Ping Node offering clarifications on its function and usage. Incorrect Ping Node configuration and functionality can cause problems with HA clusters. The importance of this article is critical for …
    Create your own, high-performance VM backup appliance by installing NAKIVO Backup & Replication directly onto a Synology NAS!
    This tutorial will walk an individual through the process of installing the necessary services and then configuring a Windows Server 2012 system as an iSCSI target. To install the necessary roles, go to Server Manager, and select Add Roles and Featu…
    This Micro Tutorial will teach you how to reformat your flash drive. Sometimes your flash drive may have issues carrying files so this will completely restore it to manufacturing settings. Make sure to backup all files before reformatting. This w…

    737 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

    16 Experts available now in Live!

    Get 1:1 Help Now