Hi all,
Sorry to cross-post, but I posted this in the Networking forum the other day and after more testing believe it's an issue with my ZyWall USG 20: https://www.dslreports.com/forum/r30759899-Strange-virtual-machine-bridged-interface-behavior
What's led me to believe that it's a ZyWall issue is that I: 1) installed WireShark and looked at packets on my host machine's NIC, and 2) used the packet capture feature on the USG 20 to download a .cap file to examine, and I've discovered the same thing with both methods: the ZyWall IS seeing my pings from the guest VM but isn't replying to them. There's no 802.1q VLAN tagging going on. I suspect I must be missing a route on my ZyWall, but I'm not really sure what it would look like. It should just send packets destined for my VM guest (192.168.1.35) to the same interface as for my VM host (192.168.1.34).
As I mentioned in the other thread, I'm able to ping 192.168.1.2 and .3 fine (they're other nodes on the network), but my ZyWall at 192.168.1.1 is MIA, except that my VM guest does manage to pull an IP address from it before the ZyWall starts giving it the silent treatment.
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