Virt-manager bridge settings

########## Make the physical network segment and Vm in the same network segment in the bridge mode ################## #

Br0: Configure Bridging for eth0

Edit/etc/sysconfig/network-scripts/ifcfg-eth0, enter:

# Vi/etc/sysconfig/network-scripts/ifcfg-eth0

Update it as follows:

Device = eth0

3 onboot = Yes

Ethtool_opts = "autoneg off speed 100 duplex full"

Bridge = br0

Hwaddr = B8: AC: 6f: 65: 31: E5

Save and close the file. Create/etc/sysconfig/network-scripts/ifcfg-br0, enter:

# Vi/etc/sysconfig/network-scripts/ifcfg-br0

Update it as follows (note options are case sensitive I. e. Bridge and bridge are two different options)

Device = br0

Type = Bridge

Bootproto = static

Onboot = Yes

Ipaddr = 10.10.21.70

Netmask = 255.255.255.255.192

Delay = 0

Save and close the file. Finally, create Static Routing file/etc/sysconfig/network-scripts/route-br0, enter:

# Vi/etc/sysconfig/network-scripts/route-br0

Edit it as follows:

10.0.0.0/8 via 10.10.21.122 Dev br0

Save and close the file. delete old/etc/sysconfig/network-scripts/route-eth0 (if exists ):

# Rm/etc/sysconfig/network-scripts/route-eth0

Service Network restart

######################################## ####################################

Nat-Based IP address translation converts the network segments of VM 192.168.1.0/24 to allow the VM to access the Internet, but the VM cannot be accessed from the Internet.

Reference:

Http://segmentfault.com/blog/koy/1190000000644069

Http://www.linuxidc.com/Linux/2012-05/61445.htm

[[Email protected] networks] # cd/etc/libvirt/qemu/networks

[[Email protected] networks] # SCP default. xml mynat. xml

[[Email protected] networks] # Cat mynat. xml modify the mynat CIDR block to 192.168.1.0/24

<Network>

<Name> mynat </Name>

<UUID> 504730bc-0a59-4fb7-a4a7-9b779fa4bf79 </UUID>

<Forward mode = 'nat '/>

<Bridge name = 'br0' STP = 'on' delay = '0'/>

<MAC address = '52: 54: 00: FD: Be: C8 '/>

<IP address = '1970. 168.1.1 'netmask = '1970. 255.255.0'>

<DHCP>

<Range start = '192. 168.1.2 'End = '192. 168.1.254'/>

</DHCP>

</IP>

</Network>

[[Email protected] networks] # virsh net-define mynat. xml

Network mynat defined from mynat. xml

[[Email protected] networks] # virsh net-autostart mynat

Network mynat marked as autostarted

[[Email protected] networks] # virsh net-start mynat

[[Email protected] networks] # brctl show

Bridge namebridge idstp enabledinterfaces

Br08000.525400fdbec8yes br0-nic

Br18000.000000000000 No

Pan08000.000000000000 No

Virbr08000.525400fdbec9yes virbr0-nic

[[Email protected] networks] #

 

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Virt-manager bridge settings