Help Please with Network issue

Discussion in 'OS X Mountain Lion (10.8)' started by Jkb242, Dec 22, 2013.

  1. Jkb242, Dec 22, 2013
    Last edited: Dec 22, 2013

    Jkb242 macrumors newbie

    Jun 19, 2012
    I have a Netgear JGS516 fast switch which works with all my Windows PC's on my LAN but if i connect my MAC pro to the switch it can not reach the internet.

    It worked once through this switch but now it does not.

    I am presently running 10.8.5 with the latest update and have mac connected directly to switch using the ethernet port En0 on the MAC.

    If I connect the MAC directly to the router/Gateway (Uverse) i am able to see the internet, but only if I bypass the switch. The switch is non-managable so it simply passes through all traffic and Workgroup names of the router. The MAC has the same workgroup as the other pc's on the LAN.

    Please someone give me some guidance or suggestion. I've tried different ports on the switch and everything I can think of. I was likely running 10.8.3 when all worked normal but what could be in 10.8.5 that would cause such an issue if that is even a possibility.

    Thanks so much!!
  2. MisterMe macrumors G4


    Jul 17, 2002
    Let us make sure that you have your terms correct. It sounds like you have a U-verse modem and the smart switch. Some modems also serve as routers. It appears that your U-verse modem does not do this. If this is the case, then the switch is sharing the same IP address among several devices. A switch can multiply the LAN ports of a router. However, it cannot multiply the number of IP addresses issued by the modem.

    You need a router such as an Apple Airport Extreme (recommended), Cisco Linksys, or Netgear.
  3. Altemose macrumors G3


    Mar 26, 2013
    Elkton, Maryland
    Does your System Preferences show a valid IP address? Simply put, try running Network Diagnostics and following the wizard to see if it helps. If you aren't getting an IP then you need to trace that. It is like saying "Go deliver this information to a person living at 100 Main Street". 100 Main Street is your U-Verse IP. However, at 100 Main Street is an apartment complex that requires you to know what apartment (Local IP) the recipient of the data is in.

    Start with IP errors and work your way from there. I use Ethernet all the time and in some cases I have to manually assign the IP due to the fact that DHCP is limited to a certain number of addresses.

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