bumokep

# brctl show
bridge name bridge id STP enabled interfaces
br0 8000.ххххххххb6 no em0
vnet0

Оптимизайка:
и в ней прописать статический ip-адрес

Оптимизайка:
Так не должно быть

# The primary network interface
#auto em0
#iface em0 inet dhcp

# brctl show
bridge name bridge id STP enabled interfaces
br0 8000.ххххххххххххb6 no em0
virbr0 8000.000000000000 yes

# The loopback network interface
auto lo
iface lo inet loopback

# The primary network interface
auto em0
iface em0 inet dhcp

auto br0
iface br0 inet static
address 70.99.99.33
gateway 70.99.99.1
netmask 255.255.255.0
network 70.99.99.0
broadcast 70.99.99.255
bridge_ports em0
bridge_stp off
bridge_maxwait 0
bridge_fd 0

# ifconfig
br0 Link encap:Ethernet HWaddr ххххххххххххххххххх:b6
inet addr:70.99.99.33 Bcast:70.99.99.255 Mask:255.255.255.0
inet6 addr: XXXXXXXXXXXXXXXXXXXXXXXXXXXX/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:1777 errors:0 dropped:0 overruns:0 frame:0
TX packets:656 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:147798 (147.7 KB) TX bytes:127002 (127.0 KB)

em0 Link encap:Ethernet HWaddr ххххххххххххххххххх:b6
inet addr:70.99.99.33 Bcast:70.99.99.255 Mask:255.255.255.0
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:1827 errors:0 dropped:8 overruns:0 frame:0
TX packets:649 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:185260 (185.2 KB) TX bytes:126550 (126.5 KB)
Interrupt:16

lo Link encap:Local Loopback
inet addr:127.0.0.1 Mask:255.0.0.0
inet6 addr: ::1/128 Scope:Host
UP LOOPBACK RUNNING MTU:65536 Metric:1
RX packets:394 errors:0 dropped:0 overruns:0 frame:0
TX packets:394 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:31604 (31.6 KB) TX bytes:31604 (31.6 KB)

virbr0 Link encap:Ethernet HWaddr XXXXXXXXXXXXXXXXX:3d
inet addr:192.168.122.1 Bcast:192.168.122.255 Mask:255.255.255.0
UP BROADCAST MULTICAST MTU:1500 Metric:1
RX packets:0 errors:0 dropped:0 overruns:0 frame:0
TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:0 (0.0 B) TX bytes:0 (0.0 B)

# virsh net-dumpxml default
<network>
<name>default</name>
<uuid>хххххххххххххххххххххххххххххххххххх</uuid>
<forward mode='nat'>
<nat>
<port start='1024' end='65535'/>
</nat>
</forward>
<bridge name='virbr0' stp='on' delay='0'/>
<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>

# virsh iface-list
Name State MAC Address
---------------------------------------------------
br0 active ххххххххххххххххххх:b6
lo active 00:00:00:00:00:00

virsh iface-dumpxml br0
<interface type='bridge' name='br0'>
<protocol family='ipv4'>
<ip address='70.99.99.33' prefix='24'/>
</protocol>
<protocol family='ipv6'>
<ip address='ххххххххххххххххххх:bfb6' prefix='64'/>
</protocol>
<bridge>
<interface type='ethernet' name='em0'>
<mac address='ххххххххххххххххххх:b6'/>
</interface>
</bridge>
</interface>

# cat /etc/sysctl.conf |grep ipv4
#net.ipv4.conf.default.rp_filter=1
#net.ipv4.conf.all.rp_filter=1
#net.ipv4.tcp_syncookies=1
#net.ipv4.ip_forward=1
#net.ipv4.conf.all.accept_redirects = 0
# net.ipv4.conf.all.secure_redirects = 1
#net.ipv4.conf.all.send_redirects = 0
#net.ipv4.conf.all.accept_source_route = 0
#net.ipv4.conf.all.log_martians = 1

# ip route
default via 70.99.99.1 dev br0
70.99.99.0/24 dev br0 proto kernel scope link src 70.99.99.33
70.99.99.0/24 dev em0 proto kernel scope link src 70.99.99.33
192.168.122.0/24 dev virbr0 proto kernel scope link src 192.168.122.1