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Strange network issue when ESX servers powered on

  • 1.  Strange network issue when ESX servers powered on

    Posted Dec 15, 2015 12:24 PM


    Firstly, not sure if this is the right forum but hope you can help.

    I have a issue where randomly the firewall stops responding for a small number or random hosts/pcs/physical server on my network. This problem has started since the introduction of VMware and two ESX servers. I think its an ARP issue as clearing the NIC ARP cache on the windows machine that has the trouble fixes the problem temporarily. A permeant fix is to shut off the ESX servers, which is obviously not a fix.

    Ive changed the firewall incase its that but have same issue. Any thoughts on what to check on ESX to see whats causing it? My ESX servers currently have a single NIC on the LAN vSwitch for simplicity and a separate vSwitch for 10gb iSCSI which is direct connected to the SAN. Very simple.