Hi,
I've got a question regarding how an ASA handles GARP requests from a host when ProxyARP is configured on a particular interface.
If an ASA receives a GARP request from a VM on its inside interface and the ASA is configured with "no sysopt noproxyarp inside", would the ASA respond to the GARP with its own MAC thus triggering an IP conflict on the VM?
This is related to an issue I'm having with a VMware VM running Windows Server 2016 where after a reboot, the VM has started using the APIPA IP and shows the real IP as "duplicated". Vmware's fix is to either disable GARP on network devices or on Windows VM itself.
Automatic Private IP Addressing (APIPA) on Microsoft Windows virtual machines on ESXi (1028373) (vmware.com)
I'm wondering if it is causing by the ProxyARP on the ASA.
Description . . . . . . . . . . . : vmxnet3 Ethernet Adapter
Physical Address. . . . . . . . . : 00-50-56-59-4D-20
DHCP Enabled. . . . . . . . . . . : No
Autoconfiguration Enabled . . . . : Yes
IPv4 Address. . . . . . . . . . . : 192.168.0.12(Duplicated)
Subnet Mask . . . . . . . . . . . : 255.255.255.0
Autoconfiguration IPv4 Address. . : 169.254.254.119(Preffered)
Default Gateway . . . . . . . . . : 192.168.0.1
DNS Servers . . . . . . . . . . . : 8.8.8.8
NetBIOS over Tcpip. . . . . . . . : Enabled
Thanks.
