ERL-3, CenturyLink Gigabit, Static IPs

I just bought 8 static IPs from CenturyLink.  I have a little table of 8 IP addresses now, the first is "Reserved Network" (1.2.3.1), the next five are "User Assignable" (1.2.3.2-6), then one is "Reserved Gateway" (1.2.3.7) and the last is "Reserved Broadcast" (1.2.3.8)

As an aside - after I hit "Go" on their webpage for configuring static IPs, my public IP changed to the "Reserved Gateway" IP address automatically, without switching to DHCP.

I made the following change to my config.  Couldn't figure out where to put a default gateway (or what to use for it), but a little Googling seemed to indicate that this isn't required since I'm using PPPoE (??).  So far so good.

ethernet eth0 {
    address 192.168.1.1/24
    description Local
    duplex auto
    speed auto
}
ethernet eth1 {
-    address dhcp
+    address 1.2.3.7/29
     description Internet
     duplex auto
     firewall {
         in {
             name WAN_IN
         }
         local {
             name WAN_LOCAL
         }
     }
     speed auto
     vif 201 {
         description "CenturyLink VLAN"
         firewall {
             in {
             }
         }
         pppoe 0 {
             default-route auto
             firewall {
                 in {
                     name WAN_IN
                 }
                 local {
                     name WAN_LOCAL
                 }
             }
             mtu 1492
             name-server auto
             password xxxxxx
             user-id xxxxx
         }
     }
 }

eth0 serves DHCP to my LAN.

What I'd like to do is plug in a switch to eth2 port, and have up to five computers with statically assigned public IP addresses (from the "User-Assignable" list) on this switch.

I can't figure out how to make this work.

I have tried removing all IP address config from eth1 and eth2, creating a br0 with eth1 and eth2 in the bridge and assigning 1.2.3.7 to br0 (per the latter suggestion in the answer in this thread: https://community.ubnt.com/t5/EdgeMAX/EdgeMAX-Configure-static-IP-addresses/m-p/690289#M21253).  Everything seemed to work like this except for one wrinkle: a machine plugged into eth2 configured with IP address 1.2.3.2 and gateway 1.2.3.7 looks like it is 1.2.3.7 to all "what is my public IP address" tools.  I was expecting to see 1.2.3.2. 

Did that make sense?

Any insights?  Thanks in advance.