- nmcli配置多会话
- 绑定两块网卡
-
实验1
网卡支持多会话功能，由于工作环境不同，需要配置不同的网络：如在家里使用使用DHCP获取，在公司使用固定ip，如果使用修改方式比较麻烦，配置多会话功能，在不同场景激活即可。
实验环境：
centos7、home：DHCP、company：static，自动连接
配置过程：配置信息会保存至/etc/sysconfig/network-scripts/ifcfg-name- 添加会话
[root@xt ~]# nmcli connection add con-name company autoconnect yes ifname ens36 type ethernet Connection 'company' (46f14092-152e-4af3-9273-5acbf573b2a2) successfully added. [root@xt ~]# nmcli connection add con-name home autoconnect no ifname ens36 type ethernet Connection 'home' (d3c8a326-e494-47b9-b6ea-92f18998b9b6) successfully added. [root@xt ~]# nmcli connection show NAME UUID TYPE DEVICE eno16777736 2361aff4-2de8-4868-9fd6-5d30ccdada02 802-3-ethernet eno16777736 home d3c8a326-e494-47b9-b6ea-92f18998b9b6 802-3-ethernet -- company 46f14092-152e-4af3-9273-5acbf573b2a2 802-3-ethernet ens36 [root@xt ~]# nmcli device status DEVICE TYPE STATE CONNECTION eno16777736 ethernet connected eno16777736 ens36 ethernet connected company lo loopback unmanaged -- -
修改IP地址
如果不修改默认为自动分配；
[root@xt ~]# nmcli connection modify company ipv4.addresses 172.16.0.10/16 ipv4.method manual
还可以配置DNS、gateway... - 查看效果
- 添加会话
[root@xt ~]# systemctl restart network #重启服务
[root@xt ~]# nmcli device status #ens36当前自动连接至company会话
DEVICE TYPE STATE CONNECTION
eno16777736 ethernet connected eno16777736
ens36 ethernet connected company
lo loopback unmanaged --
[root@xt ~]# ifconfig ens36 #ens36的ip信息配置正常
ens36: flags=4163 mtu 1500
inet 172.16.0.10 netmask 255.255.0.0 broadcast 172.16.255.255
inet6 fe80::20c:29ff:fe20:b507 prefixlen 64 scopeid 0x20
ether 00:0c:29:20:b5:07 txqueuelen 1000 (Ethernet)
RX packets 187 bytes 23730 (23.1 KiB)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 88 bytes 10998 (10.7 KiB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
[root@xt ~]# nmcli connection up home #将网卡会话切换至home会话
Connection successfully activated (D-Bus active path: /org/freedesktop/NetworkManager/ActiveConnection/9)
[root@xt ~]# nmcli device status
DEVICE TYPE STATE CONNECTION
eno16777736 ethernet connected eno16777736
ens36 ethernet connected home #ens36当前会话状态
lo loopback unmanaged --
[root@xt ~]# ifconfig ens36 #此时ip信息是自动获取
ens36: flags=4163 mtu 1500
inet 192.168.175.133 netmask 255.255.255.0 broadcast 192.168.175.255
inet6 fe80::20c:29ff:fe20:b507 prefixlen 64 scopeid 0x20
ether 00:0c:29:20:b5:07 txqueuelen 1000 (Ethernet)
RX packets 190 bytes 24476 (23.9 KiB)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 98 bytes 12306 (12.0 KiB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0 -
实验2：网卡绑定
1.配置两块网卡信息：设置主卡为bond0,[root@xt test]# cat ifcfg-ens36 TYPE="Ethernet" BOOTPROTO="none" DEVICE="ens36" #修改第二块网卡的名称 ONBOOT="yes" MASTER=bond0 SLAVE=yes2.创建绑定 网卡的配置文件并指定ip地址等信息
[root@xt test]# cat ifcfg-bond0 TYPE="Ethernet" BOOTPROTO="none" NAME=bond0 DEVICE=bond0 ONBOOT="yes" IPADDR=192.168.0.10 PREFIX=24 DNS=192.168.0.1 NM_CONTROLLED=no3.让内核支持bonding驱动
vim /etc/modprobe.d/bond.conf alias bond0 bonding options bond0 miimon=100 mode=6 说明：miimon是用来进行链路监测的。 比如:miimon=100，那么系统会100ms监测一次链路连接状态，如果有一条线路不通就转入另一条线路；4.重启服务
- 方法2：直接使用nmcli配置
$ nmcli con add type bond ifname mybond0 mode active-backup $ nmcli con add type bond-slave ifname eth1 master mybond0 $ nmcli con add type bond-slave ifname eth2 master mybond0 $再modify mybond0 ip相关信息，或者一开始添加 常用模式: mode=0 |balance-rr:平衡负载，同时工作且自动备援，但需要”Switch”支援及设定 mode=1：自动备援模式，只有一块网卡工作，故障后自动切换 mode=6：平均负载均衡模式，且自动备援，但无需”Switch”支援及设定 #nmcli connection add autoconnect no type bond mode balance-alb ip4 192.168.10.10/24 gw4 192.168.10.1 autoconnect no-->ONBOOT=no
[root@xt test]# nmcli -p connection show bond
===============================================================================
Connection profile details (bond)
===============================================================================
connection.id: bond
connection.uuid: 56802b0b-824e-4c76-8562-94ad43661d56
connection.interface-name: nm-bond
connection.type: bond
connection.autoconnect: no
connection.autoconnect-priority: 0
connection.timestamp: 0
connection.read-only: no
connection.permissions:
connection.zone: --
connection.master: --
connection.slave-type: --
connection.autoconnect-slaves: -1 (default)
connection.secondaries:
connection.gateway-ping-timeout: 0
connection.metered: unknown
-------------------------------------------------------------------------------
ipv4.method: manual
ipv4.dns:
ipv4.dns-search:
ipv4.addresses: 192.168.10.10/24
ipv4.gateway: 192.168.10.1
ipv4.routes:
ipv4.route-metric: -1
ipv4.ignore-auto-routes: no
ipv4.ignore-auto-dns: no
ipv4.dhcp-client-id: --
ipv4.dhcp-send-hostname: yes
ipv4.dhcp-hostname: --
ipv4.never-default: no
ipv4.may-fail: yes
-------------------------------------------------------------------------------
ipv6.method: auto
ipv6.dns:
ipv6.dns-search:
ipv6.addresses:
ipv6.gateway: --
ipv6.routes:
ipv6.route-metric: -1
ipv6.ignore-auto-routes: no
ipv6.ignore-auto-dns: no
ipv6.never-default: no
ipv6.may-fail: yes
ipv6.ip6-privacy: -1 (unknown)
ipv6.dhcp-send-hostname: yes
ipv6.dhcp-hostname: --
-------------------------------------------------------------------------------
bond.options: mode=balance-alb
-------------------------------------------------------------------------------重启服务生效：生成 配置文件永久有效：
[root@xt network-scripts]# cat ifcfg-bond
DEVICE=nm-bond
BONDING_OPTS=mode=balance-alb
TYPE=Bond
BONDING_MASTER=yes
BOOTPROTO=none
IPADDR=192.168.10.10
PREFIX=24
GATEWAY=192.168.10.1
DEFROUTE=yes
IPV4_FAILURE_FATAL=no
IPV6INIT=yes
IPV6_AUTOCONF=yes
IPV6_DEFROUTE=yes
IPV6_PEERDNS=yes
IPV6_PEERROUTES=yes
IPV6_FAILURE_FATAL=no
NAME=bond
UUID=523b6b71-9151-4887-877d-7c0bfa55e489
ONBOOT=no