Re: Virtualization Networking

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> -----Original Message-----
> From: centos-bounces@xxxxxxxxxx [mailto:centos-bounces@xxxxxxxxxx] On
> Behalf Of Richard
> Sent: Monday, October 3, 2016 10:41 PM
> To: CentOS mailing list
> Subject: Re:  Virtualization Networking
> 
> 
> 
> > Date: Monday, October 03, 2016 22:00:07 -0400
> > From: TE Dukes <tdukes@xxxxxxxxxxxxxxxxxxx>
> >
> >> From: Gordon Messmer
> >> Sent: Monday, October 3, 2016 4:25 PM
> >>
> >> On 10/03/2016 04:54 AM, TE Dukes wrote:
> >> > I can get the guest to access the internet but have tried every was
> >> > possible to be able to access the guest from the LAN or even the
> >> > host. Nothing I have tried works.
> >> >
> >> > The only thing all documentation leaves out is how to set up the
> >> > guest networking during the install.
> >>
> >>
> >> "All documentation" doesn't leave out this information.  The links I
> >> sent earlier clearly and specifically document the process for
> >> setting up a network bridge, which you need to do if you want to
> >> access your VM from the LAN.
> >>
> >> If you need help, you need to provide more information than "I can't
> >> get this to work" and "I've tried everything."  Those don't tell us
> >> anything about the state of your system.
> >> Useful information would include: your configuration files
> >> (/etc/sysconfig/network-scripts/ifcfg-*), the output of "ip link
> >> show" and "ip addr show", the output of "brctl show", and maybe the
> >> output of "virsh iface-list".
> >>
> >
> > I posted some files previously but that was like 20 or so installs
> > ago. I don't know the files you need.
> >
> > For this installation:
> >
> > /etc/sysconfig/ifcfg-eth0
> >
> > NAME="eth0"
> > BOOTPROTO=none
> > GATEWAY=192.168.1.1
> > NM_CONTROLLED=no
> > HWADDR=44:37:E6:53:1E:E2
> > MACADDR=""
> > IPV6INIT=no
> > DEVICE=eth0
> > NETMASK=255.255.255.0
> > MTU=""
> > BROADCAST=192.168.1.255
> > IPADDR=192.168.1.110
> > NETWORK=192.168.1.0
> > ONBOOT=yes
> > TYPE=Ethernet
> >
> > /etc/sysconfig/ifcfg-eth1
> >
> > GATEWAY=192.168.1.1
> > NAME=""
> > BOOTPROTO=none
> > NM_CONTROLLED=no
> > MACADDR=""
> > IPV6INIT=no
> > DEVICE=eth1
> > NETMASK=255.255.255.0
> > MTU=""
> > BROADCAST=255.255.255.255
> > IPADDR=192.168.0.111
> > NETWORK=192.168.0.0
> > ONBOOT=yes
> >
> > /etc/sysconfig/ifcfg-lo
> >
> > GATEWAY=192.168.1.1
> > NAME=loopback
> > BOOTPROTO=none
> > MACADDR=""
> > IPV6INIT=no
> > DEVICE=lo
> > NETMASK=255.0.0.0
> > MTU=""
> > BROADCAST=127.255.255.255
> > IPADDR=127.0.0.1
> > NETWORK=127.0.0.0
> > ONBOOT=yes
> >
> 
> Some of the things in your ifcfg files look odd to me. Rather than
> enumerating them, here are my files from a centos-6 host system.
> 
> This is a 2-NIC machine where the "host" uses eth1 and the guest(s) use
> eth0.
> 
> One specific point -- lo is the localhost, so I don't think it should have
a
> gateway entry, as you are showing.
> 
> ifcfg-br0
> ::::::::::::::
> DEVICE="br0"
> BOOTPROTO="static"
> BROADCAST="192.168.1.255"
> DNS1="192.168.1.36"
> GATEWAY="192.168.1.1"
> NETMASK="255.255.255.0"
> IPV6INIT="no"
> IPV6_AUTOCONF="no"
> NM_CONTROLLED="no"
> ONBOOT="yes"
> TYPE="Bridge"
> DELAY="0"
> ::::::::::::::
> ifcfg-eth0
> ::::::::::::::
> DEVICE="eth0"
> BOOTPROTO="static"
> BROADCAST="192.168.1.255"
> DNS1="192.168.1.36"
> GATEWAY="192.168.1.1"
> HWADDR="78:2B:CB:38:73:BD"
> NETMASK="255.255.255.0"
> NM_CONTROLLED="no"
> BRIDGE="br0"
> ONBOOT="yes"
> ::::::::::::::
> ifcfg-eth1
> ::::::::::::::
> DEVICE="eth1"
> BOOTPROTO="static"
> BROADCAST="192.168.1.255"
> DNS1="192.168.1.36"
> GATEWAY="192.168.1.1"
> HWADDR="78:2B:CB:38:73:BE"
> IPADDR="192.168.1.52"
> NETMASK="255.255.255.0"
> NM_CONTROLLED="yes"
> ONBOOT="yes"
> ::::::::::::::
> ifcfg-lo
> ::::::::::::::
> DEVICE=lo
> IPADDR=127.0.0.1
> NETMASK=255.0.0.0
> NETWORK=127.0.0.0
> ONBOOT=yes
> NAME=loopback
> 
>  

Thanks, I'll adjust those to my  particular DNS, GATEWAY, etc and give it a
try.

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