thanks for your reply! I have plugged the tap0 to the bridge. when I create the tap0: tunctl -t tap0 -u root brctl addif br0 tap0 ifconfig tap0 up chmod a+rw /dev/net/tun echo 1 > /proc/sys/net/ipv4/ip_forward iptables -t nat -A POSTROUTING -j MASQUERADE so I think this is not the reason. wh.h@foxmail.com From: Michal Privoznik Date: 2015-04-20 18:09 To: wh.h@foxmail.com; libvirt-users Subject: Re: [libvirt-users] inquiry about differences between the tap and the vnet in the virt-manager On 19.04.2015 04:02, wh.h@foxmail.com wrote:
inquiry about differences between the tap and the vnet in the virt-manager
when I establish the network by the first method: create a bridge with the help of Linux commad: brctl, tap0 device is created in the host and assigned to the guest OS. tap0 device gets a name “eth0” in the guest OS. I use “ping ” command to test network state . I get the following result : concept explanation : local host: the OS where the guest OS is running remote host: another server which is connected to the local host using ethernet network . and this is my results: ping local host from guest OS is OK, I get reply from local host; ping remote host from local host is OK, I get reply from remote host; ping remote host from guest OS is not OK, I don’t get any reply from remote host; and this is my question.
Do you plug the tap0 into the bridge? This could be the missing piece. Michal