一、準備環境
VMware軟體、Centos7虛擬機器
二、新增網絡卡
為虛擬機器再新增兩塊網絡卡,檢視網絡卡資訊,可以看到有ens32、ens34、ens35三塊網絡卡
ip addr
1: lo: mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000
link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
inet 127。0。0。1/8 scope host lo
valid_lft forever preferred_lft forever
inet6 ::1/128 scope host
valid_lft forever preferred_lft forever
2: ens32: mtu 1500 qdisc pfifo_fast state UP group default qlen 1000
link/ether 00:0c:29:54:02:06 brd ff:ff:ff:ff:ff:ff
inet 192。168。30。142/24 brd 192。168。30。255 scope global noprefixroute dynamic ens32
valid_lft 1615sec preferred_lft 1615sec
inet6 fe80::d089:c15:e69a:8ce4/64 scope link noprefixroute
valid_lft forever preferred_lft forever
3: ens34: mtu 1500 qdisc pfifo_fast state UP group default qlen 1000
link/ether 00:0c:29:54:02:1a brd ff:ff:ff:ff:ff:ff
inet 192。168。30。143/24 brd 192。168。30。255 scope global noprefixroute dynamic ens34
valid_lft 1765sec preferred_lft 1765sec
inet6 fe80::a4af:b843:9032:9dd3/64 scope link noprefixroute
valid_lft forever preferred_lft forever
4: ens35: mtu 1500 qdisc pfifo_fast state UP group default qlen 1000
link/ether 00:0c:29:54:02:10 brd ff:ff:ff:ff:ff:ff
inet 192。168。30。141/24 brd 192。168。30。255 scope global noprefixroute dynamic ens35
valid_lft 1765sec preferred_lft 1765sec
inet6 fe80::b7cf:76d7:23aa:63c2/64 scope link noprefixroute
valid_lft forever preferred_lft forever
檢視網絡卡配置檔案,可以看到新增網絡卡後,並沒有生成對應的網絡卡檔案
ls /etc/sysconfig/network-scripts/ifcfg*
/etc/sysconfig/network-scripts/ifcfg-ens32 /etc/sysconfig/network-scripts/ifcfg-lo
可以為網絡卡生成配置檔案,但在本文中不需要這樣做
nmcli connection add type ethernet con-name ens34 ifname ens34 autoconnect yes
nmcli connection add type ethernet con-name ens35 ifname ens35 autoconnect yes
再次檢視網絡卡配置檔案,生成成功
ls /etc/sysconfig/network-scripts/ifcfg*
/etc/sysconfig/network-scripts/ifcfg-ens32 /etc/sysconfig/network-scripts/ifcfg-ens35
/etc/sysconfig/network-scripts/ifcfg-ens34 /etc/sysconfig/network-scripts/ifcfg-lo
三,選定網絡卡繫結模式
多網絡卡一共有7種bond模式,這裡直接選用mode=6 (balance-alb) Adaptive load balancing(介面卡適應性負載均衡),該模式不需要交換機支援
四、開始配置
1、載入bonding模組,並設定開機啟動
[root@localhost ~]# lsmod | grep bonding[root@localhost ~]# modprobe bonding[root@localhost ~]# lsmod | grep bondingbonding 152979 0
啟用rc。local開機啟動項
chmod +x /etc/rc。d/rc。local
在檔案中寫入modprobe bonding
2、建立bond網口配置檔案並進行配置
/etc/sysconfig/network-scripts/ifcfg-bond0
DEVICE=bond0
NAME=bond0
TYPE=Bond
BONDING_MASTER=yes
IPADDR=192。168。30。250
PREFIX=255。255。255。0
GATEWAY=192。168。30。2
DNS1=114。114。114。114
ONBOOT=yes
BOOTPROTO=none
BONDING_OPTS=“mode=6 miimon=100”
3、修改三塊網絡卡的配置
vi /etc/sysconfig/network-scripts/ifcfg-ens32
DEVICE=ens32
ONBOOT=yes
BOOTPROTO=none
TYPE=Ethernet
MASTER=bond0
SLAVE=yes
vi /etc/sysconfig/network-scripts/ifcfg-ens34
DEVICE=ens34
ONBOOT=yes
BOOTPROTO=none
TYPE=Ethernet
MASTER=bond0
SLAVE=yes
vi /etc/sysconfig/network-scripts/ifcfg-ens35
DEVICE=ens35
ONBOOT=yes
BOOTPROTO=none
TYPE=Ethernet
MASTER=bond0
SLAVE=yes
4、重新載入網路配置
注意:這一步會斷網!
nmcli connection reload && systemctl restart network。service
使用新IP連結ssh
五、驗證繫結是否生效
cat /proc/net/bonding/bond0
Ethernet Channel Bonding Driver: v3。7。1 (April 27, 2011)
Bonding Mode: adaptive load balancing
Primary Slave: None
Currently Active Slave: ens32
MII Status: up
MII Polling Interval (ms): 100
Up Delay (ms): 0
Down Delay (ms): 0
Slave Interface: ens32
MII Status: up
Speed: 1000 Mbps
Duplex: full
Link Failure Count: 0
Permanent HW addr: 00:0c:29:54:02:06
Slave queue ID: 0
Slave Interface: ens34
MII Status: up
Speed: 1000 Mbps
Duplex: full
Link Failure Count: 0
Permanent HW addr: 00:0c:29:54:02:1a
Slave queue ID: 0
Slave Interface: ens35
MII Status: up
Speed: 1000 Mbps
Duplex: full
Link Failure Count: 0
Permanent HW addr: 00:0c:29:54:02:10
Slave queue ID: 0
檢視網絡卡狀態
ip addr
1: lo: mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000
link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
inet 127。0。0。1/8 scope host lo
valid_lft forever preferred_lft forever
inet6 ::1/128 scope host
valid_lft forever preferred_lft forever
2: ens32: mtu 1500 qdisc pfifo_fast master bond0 state UP group default qlen 1000
link/ether 00:0c:29:54:02:06 brd ff:ff:ff:ff:ff:ff
3: ens34: mtu 1500 qdisc pfifo_fast master bond0 state UP group default qlen 1000
link/ether 00:0c:29:54:02:1a brd ff:ff:ff:ff:ff:ff
4: ens35: mtu 1500 qdisc pfifo_fast master bond0 state UP group default qlen 1000
link/ether 00:0c:29:54:02:10 brd ff:ff:ff:ff:ff:ff
5: bond0: mtu 1500 qdisc noqueue state UP group default qlen 1000
link/ether 00:0c:29:54:02:06 brd ff:ff:ff:ff:ff:ff
inet 192。168。30。250/24 brd 192。168。30。255 scope global bond0
valid_lft forever preferred_lft forever
inet6 fe80::20c:29ff:fe54:206/64 scope link
valid_lft forever preferred_lft forever
檢視介面頻寬,頻寬為3G
ethtool bond0
Settings for bond0:
Supported ports: [ ]
Supported link modes: Not reported
Supported pause frame use: No
Supports auto-negotiation: No
Supported FEC modes: Not reported
Advertised link modes: Not reported
Advertised pause frame use: No
Advertised auto-negotiation: No
Advertised FEC modes: Not reported
Speed: 3000Mb/s
Duplex: Full
Port: Other
PHYAD: 0
Transceiver: internal
Auto-negotiation: off
Link detected: yes
連續ping測試,並禁用第一個網絡卡,此時會丟一個包,網路依然正常執行
來自 192。168。30。250 的回覆: 位元組=32 時間
來自 192。168。30。250 的回覆: 位元組=32 時間
來自 192。168。30。250 的回覆: 位元組=32 時間=1ms TTL=64
請求超時。
來自 192。168。30。250 的回覆: 位元組=32 時間=1ms TTL=64
來自 192。168。30。250 的回覆: 位元組=32 時間
完畢!