I am trying to figure out the best way to improve reliability and uptime of my network in my server rack.
Facts: - Sonicwall 3600 FW/Router (active/passive) - 1 internet and 1 leased line connection, + 2 IP sec tunnels - 2x HP2920 switches with stacking module (only 1 switch is actually in use right now) - about 15 host machines (2 NIC) running VM's (probably about 50 VM's or so) - Network is VLAN'ed (flat segment for the physical machines, various VLAN's for the VM's)
It's a production environment so I can't make major changes, and can't spend any more money, so I am trying to see how to make best use of what I have.
We tried to configure NIC bonding at the server level to connect out 1 NIC to 1 switch each , but that caused a ARP flood that brought down the whole network, so obviously we weren't doing things right. Hosts are Unix hosts. Anyone has experience in this kind of setup to provide some guidance? We are not a big shop to have all the complex networking setups that you find when Googling around - just trying to get something relatively simple that meets our needs so that I don't have hours and hours of outage if the switch goes down.