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I had the same issue with the quad-port Intel NIC and when replacing the switch with a 3750 running IOS 15.2.4(E9). I think I figured this out. It was the ArpProxy on the Firepower 1010. I disabled ArpProxy on the Firepower 1010 with the sysopt noproxy <interface name> command, removed the...

When the registry entry for ArpRetryCount is not present, the follow message shows on the switch: "IP ARP: ignored gratuitous arp src 0.0.0.0 521f.d9a8.f842, dst 10.10.0.121 001c.5827.f9c8, interface Vlan10" Here's a post from...

Here's another update. I implemented Open vSwitch and still have the same issue. I did some further digging though. The issue only occurs on a single VLAN (VLAN 10). Both Windows and Linux detect a Duplicate Address coming from the Cisco Firepower 1010. However, if I disable Duplicate Address...

Here's an update... I disabled LACP on ProxMox and the switch. I configured balance-rr on the bond interface for ProxMox and I still have the same issue. I have reverted the changes back to LACP.

Could you find out what the LACP settings needed to be changed on the Cisco switch? I believe I have a similar issue.

Hello all, I'm having an issue with ProxMox and Cisco gear. The ProxMox server has a four-port ethernet NIC in an Open vSwitch LACP bond (I previously tried the built-in Linux interface config as well) to a Cisco 3560 Switch which then uplinks to a Cisco FirePower 1010 firewall. I have 5 VMs...