xenserver 有时候会出现“no manager interface configured” "<No interfaces present>"的提示，尤其是在更新以后，这里给出解决办法
1、把这台xenserver从POOL中剔除（如果没有加入POOL可以跳过这一步）
xe host-list
uuid ( RO) : 328dbe1c-4b63-4843-b8b3-40ad30acf3db
name-label ( RW): rischa-xen02
name-description ( RW): Default install of XenServerThen I made the pool master forget the “dead” server with:
xe host-forget uuid=328dbe1c-4b63-4843-b8b3-40ad30acf3db
2、把这台xenserver的存储卸载
xe sr-list
Gave me:
..snip..
uuid ( RO) : 28006370-23ab-9975-e33c-7f06a1b88516
name-label ( RW): Removable storage
name-description ( RW):
host ( RO): <not in database>
type ( RO): udev
content-type ( RO): disk
uuid ( RO) : f6bf51a8-26b7-4c82-b4f2-8be70ca7263b
name-label ( RW): Local storage
name-description ( RW):
host ( RO): <not in database>
type ( RO): lvm
content-type ( RO): user
uuid ( RO) : b4adcc4f-86c3-8cba-2e76-44ffe4f24805
name-label ( RW): DVD drives
name-description ( RW): Physical DVD drives
host ( RO): <not in database>
type ( RO): udev
content-type ( RO): iso
..snip..(通常情况下SR’s 的状态会显示<not in database>”, 因此我们把它删除掉
xe sr-forget uuid=28006370-23ab-9975-e33c-7f06a1b88516
xe sr-forget uuid=f6bf51a8-26b7-4c82-b4f2-8be70ca7263b
xe sr-forget uuid=b4adcc4f-86c3-8cba-2e76-44ffe4f24805
3、现在，我们的xenserver已经从POOL中剔除，登陆这台xenserver的控制台
mv /var/xapi/state.db /var/xapi/state.db_old
xe pool-emergency-transition-to-master
xe pif-scan host-uuid=328dbe1c-4b63-4843-b8b3-40ad30acf3db
xe pif-list
应该会有如下显示
uuid ( RO) : 3cdafc3d-438b-0c42-e220-767f373cc0e6
device ( RO): eth1
currently-attached ( RO): true
VLAN ( RO): -1
network-uuid ( RO): e7797467-a284-3d2c-e1b4-bb5697d2511c
uuid ( RO) : 6e025c8f-109c-4603-80db-0cdcc28e5219
device ( RO): eth0
currently-attached ( RO): false
VLAN ( RO): -1
network-uuid ( RO): a662c677-2d6b-808a-666f-b5fb0a5b436b现在运行“xsconsole” 你应该能看到网络了，在把它重新加到xencenter中，OK
如果按我的方法做的解决了，麻烦评论下。