安装了15.10, 以后fstab里面的smaba共享服务开机无法自动挂载了, 升级到16.04也不行, cat /var/log/syslog里面可以看到有去做挂载动作,但是提示network unreachable, 启动以后手动执行sudo mount -a可以挂载上.

ps: 开机是一直连着网的; 并且我以前一直是可以开机挂载的;
下面是我的fstab, 大神帮忙看一下, 这个是什么问题(急)???:
# /etc/fstab: static file system information.
#
# Use 'blkid' to print the universally unique identifier for a
# device; this may be used with UUID= as a more robust way to name devices
# that works even if disks are added and removed. See fstab(5).
#
# <file system> <mount point> <type> <options> <dump> <pass>
# / was on /dev/sda7 during installation
UUID=b9705a66-0a76-4fc8-9c67-278241527129 / ext4 errors=remount-ro 0 1
# /opt was on /dev/sda9 during installation
UUID=63429130-5c9c-479c-a5b5-a616122b1e8c /opt ext4 defaults 0 2
# /usr was on /dev/sda8 during installation
UUID=bdce3933-3cec-4cee-a266-7b510c51987d /usr ext4 defaults 0 2
# /mnt/local was on /dev/sda6 during installation
UUID=f1fd4700-3e1e-d101-407c-46003e1ed101 /mnt/local ext4 defaults 0 2
# swap was on /dev/sda10 during installation
UUID=d7cf0de2-46aa-4834-aa2a-a09ad8541ba8 none swap sw 0 0


#//10.18.11.245/fileroot/ /mnt/245/ cifs username=xxx,password=xxx,iocharset=utf8 0 2
#//10.18.11.248/fileroot/ /mnt/248/ cifs username=xxx,password=xxx,iocharset=utf8 0 2
//10.18.11.246/fileroot/ /mnt/246/ cifs username=xxx,password=xxx,uid=starkli,gid=starkli,iocharset=utf8 0 0
//10.18.11.248/fileroot/ /mnt/248/ cifs username=xxx,password=xxx,uid=starkli,gid=starkli,iocharset=utf8 0 0

大神们帮忙看看啊, 在网上搜貌似没人遇到过这种现象?

1.
尝试增加 _netdev 选项

2.


参考
http://askubuntu.com/questions/399643/cifs-mount-through-fstab-not-mounting-at-boot
https://bbs.archlinux.org/viewtopic.php?id=149830
https://forums.opensuse.org/showthread.php/494136-Issues-mounting-smb-share-at-boot-time-using-fstab-with-openSuse-13-1-(also-experienced-with-12-3)
http://ubuntuforums.org/archive/index.php/t-1132707.html

大神!!! 果然好了....

3楼厉害。
明显感觉就是网络还没启来，就开始要挂载了。