bond6 一个IP双网卡热备

虚拟机添加网卡

添加网卡配置文件与虚拟网卡bond配置文件

[root@localhost ~]# cd /etc/sysconfig/network-scripts/
[root@localhost network-scripts]# ls
ifcfg-eno16777736  ifdown-ib    ifdown-ppp       ifdown-tunnel  ifup-ib    ifup-plusb   ifup-Team         network-functions
ifcfg-lo           ifdown-ippp  ifdown-routes    ifup           ifup-ippp  ifup-post    ifup-TeamPort     network-functions-ipv6
ifdown             ifdown-ipv6  ifdown-sit       ifup-aliases   ifup-ipv6  ifup-ppp     ifup-tunnel
ifdown-bnep        ifdown-isdn  ifdown-Team      ifup-bnep      ifup-isdn  ifup-routes  ifup-wireless
ifdown-eth         ifdown-post  ifdown-TeamPort  ifup-eth       ifup-plip  ifup-sit     init.ipv6-globa
[root@localhost network-scripts]# cp ifcfg-eno16777736 ifcfg-eno33554984
[root@localhost network-scripts]# cp ifcfg-eno16777736 ifcfg-bond0

配置文件详情（mode=6模式只做热备不需要交换机或路由器支持，miimon每100ms检测链路）

[root@localhost network-scripts]# cat ifcfg-bond0 
DEVICE=bond0
TYPE=Ethernet
NAME=bond0
BONDING_MASTER=yes
BOOTPROTO=none
ONBOOT=yes
IPADDR=192.168.3.135
NETMASK=255.255.254.0
GATEWAY=192.168.2.1
BONDING_OPTS="mode=6 miimon=100"
[root@localhost network-scripts]# cat ifcfg-eno16777736
TYPE=Ethernet
BOOTPROTO=none
DEVICE=eno16777736
ONBOOT=yes
HWADDR=00:0c:29:9c:5f:7a
MASTER=bond0
SLAVE=yes
[root@localhost network-scripts]# cat ifcfg-eno33554984
TYPE=Ethernet
BOOTPROTO=none
NAME=eno33554984
DEVICE=eno33554984
ONBOOT=yes
HWADDR=00:0c:29:9c:5f:84
MASTER=bond0
SLAVE=yes

启动bond模块并配置开机自动加载bond模块

[root@localhost network-scripts]# modprobe bonding
[root@localhost network-scripts]# modinfo bonding
[root@localhost network-scripts]# cat /etc/modprobe.d/mlx4.conf 
# This file is intended for users to select the various module options
# they need for the mlx4 driver.  On upgrade of the rdma package,
# any user made changes to this file are preserved.  Any changes made
# to the libmlx4.conf file in this directory are overwritten on
# pacakge upgrade.
#
# Some sample options and what they would do
# Enable debugging output, device managed flow control, and disable SRIOV
#options mlx4_core debug_level=1 log_num_mgm_entry_size=-1 probe_vf=0 num_vfs=0
#
# Enable debugging output and create SRIOV devices, but don't attach any of
# the child devices to the host, only the parent device
#options mlx4_core debug_level=1 probe_vf=0 num_vfs=7
#
# Enable debugging output, SRIOV, and attach one of the SRIOV child devices
# in addition to the parent device to the host
#options mlx4_core debug_level=1 probe_vf=1 num_vfs=7
#
# Enable per priority flow control for send and receive, setting both priority
# 1 and 2 as no drop priorities
#options mlx4_en pfctx=3 pfcrx=3
alias bond0 bonding

重启网络服务

[root@localhost network-scripts]# systemctl restart network.service
[root@localhost network-scripts]# ifconfig
bond0: flags=5187  mtu 1500
        inet 192.168.3.135  netmask 255.255.254.0  broadcast 192.168.3.255
        inet6 fe80::20c:29ff:fe9c:5f7a  prefixlen 64  scopeid 0x20
        ether 00:0c:29:9c:5f:7a  txqueuelen 0  (Ethernet)
        RX packets 89003  bytes 5784026 (5.5 MiB)
        RX errors 0  dropped 19927  overruns 0  frame 0
        TX packets 4372  bytes 369610 (360.9 KiB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

eno16777736: flags=6211  mtu 1500
        ether 00:0c:29:9c:5f:7a  txqueuelen 1000  (Ethernet)
        RX packets 67758  bytes 4381078 (4.1 MiB)
        RX errors 0  dropped 1  overruns 0  frame 0
        TX packets 2522  bytes 230974 (225.5 KiB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

eno33554984: flags=6211  mtu 1500
        ether 00:0c:29:9c:5f:84  txqueuelen 1000  (Ethernet)
        RX packets 68827  bytes 4499203 (4.2 MiB)
        RX errors 0  dropped 19926  overruns 0  frame 0
        TX packets 2528  bytes 244988 (239.2 KiB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

lo: flags=73  mtu 65536
        inet 127.0.0.1  netmask 255.0.0.0
        inet6 ::1  prefixlen 128  scopeid 0x10
        loop  txqueuelen 0  (Local Loopback)
        RX packets 711  bytes 182882 (178.5 KiB)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 711  bytes 182882 (178.5 KiB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

查看当前bond使用的物理网口

[root@localhost network-scripts]# 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: eno16777736
MII Status: up
MII Polling Interval (ms): 100
Up Delay (ms): 0
Down Delay (ms): 0

Slave Interface: eno16777736
MII Status: up
Speed: 1000 Mbps
Duplex: full
Link Failure Count: 0
Permanent HW addr: 00:0c:29:9c:5f:7a
Slave queue ID: 0

Slave Interface: eno33554984
MII Status: up
Speed: 1000 Mbps
Duplex: full
Link Failure Count: 0
Permanent HW addr: 00:0c:29:9c:5f:84
Slave queue ID: 0

将当前bond网络断开再查看bond网络

[root@localhost network-scripts]# 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: eno33554984
MII Status: up
MII Polling Interval (ms): 100
Up Delay (ms): 0
Down Delay (ms): 0

Slave Interface: eno16777736
MII Status: down
Speed: Unknown
Duplex: Unknown
Link Failure Count: 1
Permanent HW addr: 00:0c:29:9c:5f:7a
Slave queue ID: 0

Slave Interface: eno33554984
MII Status: up
Speed: 1000 Mbps
Duplex: full
Link Failure Count: 0
Permanent HW addr: 00:0c:29:9c:5f:84
Slave queue ID: 0