Linux sysctl -p 报error: "net.bridge.bridge-nf-call-ip6tables" is an unknown key

错误详情：

error: "net.bridge.bridge-nf-call-ip6tables" is an unknown key
error: "net.bridge.bridge-nf-call-iptables" is an unknown key
error: "net.bridge.bridge-nf-call-arptables" is an unknown key

解决方法：

[root@localhost /]# modprobe bridge
[root@localhost /]# lsmod|grep bridge