Hello. I desire to get bridge network working using virt-manager. Centos 7 and centos 7 guest.
From researching I think I need to have a ifcfg-br0 file like this ?
cat ifcfg-br0 DEVICE=nm-bridge0 STP=no TYPE=Bridge BOOTPROTO=none IPADDR=192.168.1.8 PREFIX=32 GATEWAY=192.168.1.1 IPV6INIT=no NAME=br0 ONBOOT=yes DELAY=0
Is that for sure needed ? The use that nm-bridge0 as the network name?
I dont want to mess up my current setup. Thanks,
Jerry
I haven't done bridging on CentOS but, in the setups I've done, you need to associate a physical NIC such as eth0 with the bridge.
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Hello. I desire to get bridge network working using virt-manager. Centos 7 and centos 7 guest.
From researching I think I need to have a ifcfg-br0 file like this ?
cat ifcfg-br0 DEVICE=nm-bridge0 STP=no TYPE=Bridge BOOTPROTO=none IPADDR=192.168.1.8 PREFIX=32 GATEWAY=192.168.1.1 IPV6INIT=no NAME=br0 ONBOOT=yes DELAY=0
Is that for sure needed ? The use that nm-bridge0 as the network name?
I dont want to mess up my current setup. Thanks,
Jerry _______________________________________________ CentOS mailing list CentOS@centos.org https://lists.centos.org/mailman/listinfo/centos
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Am 02.06.2020 um 12:38 schrieb Jerry Geis:
Hello. I desire to get bridge network working using virt-manager. Centos 7 and centos 7 guest.
From researching I think I need to have a ifcfg-br0 file like this ?
cat ifcfg-br0 DEVICE=nm-bridge0 STP=no TYPE=Bridge BOOTPROTO=none IPADDR=192.168.1.8 PREFIX=32 GATEWAY=192.168.1.1 IPV6INIT=no NAME=br0 ONBOOT=yes DELAY=0
Is that for sure needed ? The use that nm-bridge0 as the network name?
I dont want to mess up my current setup. Thanks,
Jerry
Use the virt-manager to create the desired bridge. It will end under /etc/libvirt/qemu/networks/. And there probably exists already a
# cat /etc/libvirt/qemu/networks/default.xml <!-- WARNING: THIS IS AN AUTO-GENERATED FILE. CHANGES TO IT ARE LIKELY TO BE OVERWRITTEN AND LOST. Changes to this xml configuration should be made using: virsh net-edit default or other application using the libvirt API. -->
<network> <name>default</name> <uuid>79d01cb2-28a4-4bdc-8b68-80ac588b2d61</uuid> <forward mode='nat'/> <bridge name='virbr0' stp='on' delay='0'/> <mac address='52:54:00:ec:84:b0'/> <ip address='192.168.122.1' netmask='255.255.255.0'> <dhcp> <range start='192.168.122.2' end='192.168.122.254'/> </dhcp> </ip> </network>
Alexander
Ok so I have used virt-manager to create the name NET100 This is what shows.
<network> <name>NET100</name> <uuid>1ba45e54-93c2-f291-8b35-a7fe8cae9ac1</uuid> <forward dev='eth0' mode='nat'> <interface dev='eth0'/> </forward> <bridge name='virbr1' stp='on' delay='0' /> <mac address='52:54:00:9C:39:02'/> <ip address='192.168.100.1' netmask='255.255.255.0'> <dhcp> <range start='192.168.100.128' end='192.168.100.254' /> </dhcp> </ip> </network>
I DO get a DHCP on my network - but the client cannot connect to the host machine. Has access to internet - but just not the host.
jerry
On 6/2/20 8:53 AM, Jerry Geis wrote:
Ok so I have used virt-manager to create the name NET100 This is what shows.
<network> <name>NET100</name> <uuid>1ba45e54-93c2-f291-8b35-a7fe8cae9ac1</uuid> <forward dev='eth0' mode='nat'> <interface dev='eth0'/> </forward> <bridge name='virbr1' stp='on' delay='0' /> <mac address='52:54:00:9C:39:02'/> <ip address='192.168.100.1' netmask='255.255.255.0'> <dhcp> <range start='192.168.100.128' end='192.168.100.254' /> </dhcp> </ip> </network>
I DO get a DHCP on my network - but the client cannot connect to the host machine. Has access to internet - but just not the host.
This isn't a real bridged network. This is a NATed local network.
On Tue, 2 Jun 2020 at 06:39, Jerry Geis jerry.geis@gmail.com wrote:
Hello. I desire to get bridge network working using virt-manager. Centos 7 and centos 7 guest.
From researching I think I need to have a ifcfg-br0 file like this ?
cat ifcfg-br0 DEVICE=nm-bridge0 STP=no TYPE=Bridge BOOTPROTO=none IPADDR=192.168.1.8 PREFIX=32 GATEWAY=192.168.1.1 IPV6INIT=no NAME=br0 ONBOOT=yes DELAY=0
Our virt-hosting systems all use bridges and I have the following setup for eth0 and br0
# ifcfg-eth0 NAME="eth0" TYPE=Ethernet ONBOOT=yes NETBOOT=yes BRIDGE="br0" UUID="<fill in uuidgen here>" HWADDR="<fill in mac address here>"
# ifcfg-br0 NAME="br0" DEVICE="br0" ONBOOT=yes NETBOOT=no UUID="<<fill in uuidgen here>>" IPV6INIT=no BOOTPROTO=none IPADDR="<< fill in ip address >>" NETMASK="<< fill in netmask >>" GATEWAY="<< fill in gateway >>" TYPE=Bridge NAME="br0" DNS1="<< fill in dns1 >>" DNS2="<< fill in dns2 >>" STP="no"
On EL8 systems it changes somewhat. If you just wants a bridge with no ip address associated with it.. leave those out. Some switches need that
On 6/2/20 3:38 AM, Jerry Geis wrote:
Hello. I desire to get bridge network working using virt-manager.
The easiest way to set up bridged networking on CentOS 7 is:
virsh iface-bridge eth0 br0 --no-stp
This command will create a new bridge interface, br0. The existing interface, eth0, will be added to the bridge, and its current IP configuration will be migrated to the new interface.
On 6/3/20 6:34 PM, Gordon Messmer wrote:
On 6/2/20 3:38 AM, Jerry Geis wrote:
Hello. I desire to get bridge network working using virt-manager.
The easiest way to set up bridged networking on CentOS 7 is:
virsh iface-bridge eth0 br0 --no-stp
This command will create a new bridge interface, br0. The existing interface, eth0, will be added to the bridge, and its current IP configuration will be migrated to the new interface.
This is likely the coolest thing I've learned all week. Thanks!
-
Alexander Dalloz -
Gordon Messmer -
Jerry Geis -
Leroy Tennison -
Orion Poplawski -
Stephen John Smoogen