Intermittent VLAN access

Discussion in 'Switches, NICs and cabling' started by psy-q, Jan 27, 2013.

  1. psy-q

    psy-q Occasional Visitor

    Joined:
    Nov 2, 2012
    Messages:
    13
    I'm having very intermittent network access over a switch on my network.

    RT-N66U Tomato -> Cisco SG300-10 -> Netgear GS108E

    I've got VLAN 2,3 & 5 trunked from the SG300 to the GS108E. It works when I swap ports on the GS108E for a minute or so, then the connection fails and the only client (my laptop) starts spamming the gateway with ARP requests(unsuccessfully). Nothing seems to be getting through and I can't ping anything in or out of my LAN.
    The weird thing is it DOES work fine for a few minutes/seconds. Also, if I disconnect the GS108E and plug the laptop directly into the switch on the same port it works. I can switch the VLAN on the NIC and get full access to every subnet.

    I've messed with STP, smartport(disabling), swapped ports on the SG300 and used a couple different NICs for testing(built-in and USB).

    Stumped... help! :confused:
     
    Last edited: Jan 27, 2013
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