When is a switch not a switch?

[D'Arcy Cain]

I am using bhyve with vm-bhyve,  I am trying to set up a virtual network 
with multiple hosts.  The idea is that a VM would be on the same virtual 
network no matter which actual host it is on.

Say I have a public network a.b.c.0/24.  I thought I could create a switch 
on a host.  The host would be a.b.c.1 and the VMs would be a.b.c.100 and 
a.b.c.101.  The idea would be that the VMs would appear on the real network. 
  Then the 101 VM could migrate to a.b.c.2 and still be accessible.  I 
envisioned some sort of proxy arp would happen so that every VM would simply 
announce itself wherever it was.

This did seem to work in that I could ping from the VM:

# ping 8.8.8.8
PING 8.8.8.8 (8.8.8.8): 56 data bytes
64 bytes from 8.8.8.8: icmp_seq=0 ttl=114 time=1.734 ms

Even IPV6:

# ping6 2605:2600:1001::4b
PING6(56=40+8+8 bytes) 2605:2600:1001::4 --> 2605:2600:1001::4b
16 bytes from 2605:2600:1001::4b, icmp_seq=0 hlim=64 time=0.960 ms
16 bytes from 2605:2600:1001::4b, icmp_seq=1 hlim=64 time=0.415 ms

However TCP doesn't work.  In fact, I could only ping by IP because the 
system couldn't connect to the DNS server, to get an address even though it 
could ping it.

I guess my first question is does this seem doable?  If so, what am I 
missing?  Is it possible that a bhyve switch is more like a router?

Thanks.

-- 
D'Arcy J.M. Cain <darcy at druid.net>         |  Democracy is three wolves
http://www.druid.net/darcy/                |  and a sheep voting on
+1 416 788 2246     (DoD#0082)    (eNTP)   |  what's for dinner.
IM: darcy at VybeNetworks.com, VoIP: sip:darcy at druid.net

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