[fedora-virt] vanilla bridging network

[Robert Strickler]

I am trying to define a network tht just bridges the traffic between the
virtual machine network and the LAN attached to eth0

No dnsmasq/dhcp as it is difficult to impossible to tie dnsmasq to the
master ISC servers on the LAN.

It should forward/receive packets like a standard hardware bridge
The virtual guests should get their addressing from the dhcp server on the
LAN and DNS from the server as well.

with the following I can not get dhcp discover reply from the LAN server,
nor can I manually code the IP/gateway/DNS and ping the hard address
(172.30.2.33) can anyone tell me what I am missing? Vhost and vguest are
both CENTOS7

======================
<networkstatus>
  <class_id bitmap='0-2'/>
  <floor sum='0'/>
  <network>
    <name>plain</name>
    <uuid>31f78c2c-257d-4c57-82e5-0c53deadbeef</uuid>
    <forward mode='bridge'/>
    <bridge name='virbr1' />
    <mac address='52:54:00:b1:34:77'/>
    <domain name='plain'/>
    <ip address='172.30.2.1' netmask='255.255.255.0'>
        <dhcp relay='yes'/>
        <dhcp enable='no' relay='yes'/>
<!--
The relay will not be started if the "enable" property is 'no':
-->
    </ip>
  </network>
</networkstatus>
===========================

A routed environment would be acceptable, but bridged is better as it
should not be required to change my routing on the gateway router

TIA,
Bob
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