docker failed to create endpoint xxx on network br1: network xxx does not exist

when i created the network,it can work properly.

[root@localhost ~]# docker run --net=br1 --ip=192.168.0.119 -ti --name=doc 328edcd84f1b /bin/bash
[root@8f5c0179d86a /]# ping www.baidu.com
PING www.a.shifen.com (115.239.210.27) 56(84) bytes of data.
64 bytes from 115.239.210.27 (115.239.210.27): icmp_seq=1 ttl=55 time=10.8 ms

but when i reboot the host(or restart the docker),it failed to start containers

I display the list of networks, it is there,but the error message tells me that it does not exist

my docker version is 1.12.6

[root@localhost ~]# docker network ls
NETWORK ID          NAME                DRIVER              SCOPE
e83fa9afc6af        br1                 bridge              local               
2fb7bed3e5ba        bridge              bridge              local               
984a5e65f182        host                host                local               
d8e8ce860225        none                null                local               
[root@localhost ~]#
[root@localhost ~]#
[root@localhost ~]# docker network inspect br1
[
    {
        "Name": "br1",
        "Id": "e83fa9afc6af2cf01b0b0103d0c98d7334717cdd5290e2121dc03a5d6b48aa84",
        "Scope": "local",
        "Driver": "bridge",
        "EnableIPv6": false,
        "IPAM": {
            "Driver": "default",
            "Options": {},
            "Config": [
                {
                    "Subnet": "192.168.0.0/24",
                    "IPRange": "192.168.0.0/24",
                    "Gateway": "192.168.0.120"
                }
            ]
        },
        "Internal": false,
        "Containers": {},
        "Options": {
            "com.docker.network.bridge.name": "br0",
            "parent": "ens33"
        },
        "Labels": {}
    }
]
[root@localhost ~]# docker ps -a
CONTAINER ID        IMAGE               COMMAND             CREATED             STATUS                        PORTS               NAMES
8f5c0179d86a        328edcd84f1b        "/bin/bash"         2 hours ago         Exited (137) 56 minutes ago                       doc
2492467008a0        328edcd84f1b        "/bin/bash"         2 hours ago         Exited (127) 2 hours ago                          mytest1
a3c7184a4bf5        328edcd84f1b        "/bin/bash"         17 hours ago        Exited (0) 17 hours ago                           awesome_perlman
f1e26864c870        328edcd84f1b        "/bin/bash"         18 hours ago        Exited (128) 17 hours ago                         berserk_kalam
ce2d1b7a6ce2        328edcd84f1b        "/bin/bash"         18 hours ago        Exited (1) 2 hours ago                            lonely_banach
[root@localhost ~]# docker start doc
Error response from daemon: failed to create endpoint doc on network br1: network e83fa9afc6af2cf01b0b0103d0c98d7334717cdd5290e2121dc03a5d6b48aa84 does not exist
Error: failed to start containers: doc