Hmm so either something has changed or my testing before was not 100%
accurate.

Using the below configuration I am unable to ping anything. Additionally
I can't talk to any resources via the default gateway (I have confirmed
I can do this without bridging in play), however I just noticed that I
can connect to the system via our admin network which is source via
172.31.252.0/22 and has a different gateway from our default gateway.

Once again here is my current /etc/network/interfaces

# The loopback network interface
auto lo
iface lo inet loopback
    post-up /usr/sbin/service dnsmasq start

#auto eth0
#iface eth0 inet static
#       address 10.42.1.28
#       netmask 255.255.254.0

auto eth0
iface eth0 inet manual
        address 0.0.0.0

auto br0
iface br0 inet static
        address 10.42.1.28
        netmask 255.255.254.0
        network 10.42.0.0
        bridge_ports eth0
        bridge_fd 0
        bridge_stp off

#auto br0
#iface br0 inet static
#        address 10.42.1.28
#        netmask 255.255.254.0
#        network 10.42.0.0
#        bridge_ports eth0
#       bridge_fd 9
#       bridge_hello 2
#       bridge_maxwait 12
#       bridge_stp off

Here is the output of ip route:
default via 10.42.0.1 dev br0  src 10.42.1.28 
10.42.0.0/23 dev br0  proto kernel  scope link  src 10.42.1.28 
172.31.240.0/21 via 10.42.0.2 dev br0 
172.31.252.0/22 via 10.42.0.2 dev br0

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https://bugs.launchpad.net/bugs/1013199

Title:
  be2net driver used by HP BL460c bridge networking not working

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