FreeBSD操作系统下修改ip地址及捆定多个IP地址

2024.05.28

     1.临时更改,即时生效.
    [root@freebsd7]# ifconfig
    le0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> metric 0 mtu 1500
            options=8<VLAN_MTU>
            ether 00:0c:29:21:2d:a6
            inet 192.168.1.106 netmask 0xffffff00 broadcast 192.168.1.255
            media: Ethernet autoselect
            status: active
    plip0: flags=108810<POINTOPOINT,SIMPLEX,MULTICAST,NEEDSGIANT> metric 0 mtu 1500
    lo0: flags=8049<UP,LOOPBACK,RUNNING,MULTICAST> metric 0 mtu 16384
            inet6 fe80::1%lo0 prefixlen 64 scopeid 0x3
            inet6 ::1 prefixlen 128
            inet 127.0.0.1 netmask 0xff000000
    Freebsd# ifconfig le0 10.0.0.123 netmask 255.255.255.0
    这种方法即时生效，但是重启机器后，信息不保留。
    2.永久保留.
    打开/etc/rc.conf
    加入或修改：ifconfig_网卡名称="inet x.x.x.x  netmask x.x.x.x"
    之后 reboot 或 #sh /etc/rc

    Freebsd# more /etc/rc.conf
    # -- sysinstall generated deltas -- # Thu Oct 12 09:37:56 2006
    # Created: Thu Oct 12 09:37:56 2006
    # Enable network daemons for user convenience.
    # Please make all changes to this file, not to /etc/defaults/rc.conf.
    # This file now contains just the overrides from /etc/defaults/rc.conf.
    defaultrouter="10.0.0.1"
    hostname="Freebsd.rhel5.com"
    ifconfig_lnc0="inet 10.0.0.123 netmask 255.255.255.0"
    keymap="us.iso"
    linux_enable="YES"
    sshd_enable="YES"
    Freebsd#
    这种方法，信息永久保留，但是修改完需要重启机器。
    如果要设置多IP地址可用别名方式作修改如下
    ifconfig_lnc0="inet 10.0.0.199 netmask 255.255.255.0"
    改为
    ifconfig_lnc0_alias0="inet 10.0.0.198 netmask 255.255.255.0"
    ifconfig_lnc0_alias1="inet 10.0.0.197 netmask 255.255.255.0"