centos7设置双网卡内外外上网配置 centos7双网卡绑定配置

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香奈儿 2024-08-28 21:24:03
文章标签 centos7设置双网卡内外外上网配置操作系统运维 Ethernet IPV6 文章分类 架构后端开发
Configure Network Bonding
系统环境
 
  
[root@test03 ~]# uname -a
Linux test03 3.10.0-327.el7.x86_64 #1 SMP Thu Nov 19 22:10:57 UTC 2015 x86_64 x86_64 x86_64 GNU/Linux

[root@test03 ~]# ip addr show 
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN 
    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: eno16777736: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP qlen 1000
    link/ether 00:0c:29:56:69:4d brd ff:ff:ff:ff:ff:ff
    inet 192.168.231.13/24 brd 192.168.231.255 scope global eno16777736
       valid_lft forever preferred_lft forever
    inet6 fe80::20c:29ff:fe56:694d/64 scope link 
       valid_lft forever preferred_lft forever
3: eno33554992: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP qlen 1000
    link/ether 00:0c:29:56:69:57 brd ff:ff:ff:ff:ff:ff
4: eno50332216: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP qlen 1000
    link/ether 00:0c:29:56:69:61 brd ff:ff:ff:ff:ff:ff
 
  
双网卡绑定目标
• 网卡绑定模式：active-backup - 主备模式
一个网卡处于活跃状态，另一个处于备份状态，所有流量都在主链路上处理，当活跃网卡down掉时，启用备份网卡。
• 绑定网卡：eno33554992+eno50332216=bond0
设置网卡eno33554992为主网卡(优先处于活跃状态)，eno50332216为辅网卡(备份状态，主网卡链路正常时，辅网卡处于备份状态)。
双网卡绑定步骤
查看物理网卡信息
 
  
[root@test03 network-scripts]# nmcli device 
DEVICE       TYPE      STATE      CONNECTION  
eno16777736  ethernet  connected  eno16777736 
eno33554992  ethernet  connected  eno33554992 
eno50332216  ethernet  connected  eno50332216 
lo           loopback  unmanaged  --   
# 共四张网卡，lo为本地回环网卡，另外三张为物理网卡。
 
  
查看网卡连接信息
 
  
[root@test03 network-scripts]# nmcli connection show 
NAME         UUID                                  TYPE            DEVICE      
eno50332216  36b38556-4bf8-4ce0-8045-4f5465530f67  802-3-ethernet  eno50332216 
eno33554992  46831ccf-905b-4361-b5ba-c5448133e288  802-3-ethernet  eno33554992 
eno16777736  613db14a-2375-4a89-b55a-d2abd8fc65d5  802-3-ethernet  eno16777736
 
  
删除网卡连接信息
本次Network bonding配置中，需要将eno33554992和eno50332216绑定为bond0，并且设置eno33554992为主网卡，首先需要这两块网卡现有的配置信息，否则bond0创建完成后，未删除的网卡配置信息会影响bond0的正常工作。
如果nmcli connectionshow命令输出中无将要进行配置的网卡连接信息，则无需进行删除操作。
 
  
[root@test03 network-scripts]# nmcli connection delete eno33554992 
[root@test03 network-scripts]# nmcli connection delete eno50332216 
[root@test03 network-scripts]# 
[root@test03 network-scripts]# nmcli connection show 
NAME         UUID                                  TYPE            DEVICE      
eno16777736  613db14a-2375-4a89-b55a-d2abd8fc65d5  802-3-ethernet  eno16777736 
# 网卡连接信息删除成功。
# 这里删除的其实就是/etc/sysconfig/network-scripts目录下两块网卡的配置文件。
[root@test03 network-scripts]# pwd
/etc/sysconfig/network-scripts
[root@test03 network-scripts]# ls ifcfg-*
ifcfg-eno16777736  ifcfg-lo
 
  
创建bond0
 
  
[root@test03 network-scripts]# nmcli connection add type bond ifname bond0 con-name bond0 miimon 100 mode active-backup primary eno33554992 ip4 192.168.231.200/24
Connection 'bond0' (dc55d681-0d5a-4de2-8e94-0e5cb2e249c9) successfully added.
 
  
• primary eno33554992：指定主网卡为eno33554992   --这里也可以不指定primary网卡（备注：子网卡均正常时，primary网卡优先处于活跃状态）。
• mode active-backup：指定bonding模式为active-backup
• miimon 100：以毫秒为单位指定 MII 链接监控的频率(默认为0，即关闭此功能；配置miimon参数时，最好从100开始)。
bonding内核模块必须在ifcfg-bondN中的BONDING_OPTS="bonding parameters"中指定，各参数间使用空格分隔，不要在/etc/modprobe.d/bonding.conf和已经弃用的/etc/modprobe.conf文件中指定bonding配置选项。
配置完成后，此时会在/etc/sysconfig/network-scripts目录下生成ifcfg-bond0的配置文件：
 
  
[root@test03 network-scripts]# cat ifcfg-bond0
DEVICE=bond0
BONDING_OPTS="miimon=100 mode=active-backup primary=eno33554992"
TYPE=Bond
BONDING_MASTER=yes
BOOTPROTO=none
IPADDR=192.168.231.200
PREFIX=24
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=bond0
UUID=dc55d681-0d5a-4de2-8e94-0e5cb2e249c9
ONBOOT=yes
 
  
创建bond0子接口
将网卡eno33554992和eno50332216创建为bond0的子接口：
 
  
# 添加网卡eno33554992：设备类型：bond-slave；连接名称：bond0-p1；master：bond0
[root@test03 network-scripts]# nmcli connection add type bond-slave ifname eno33554992 con-name bond0-p1 master bond0 
Connection 'bond0-p1' (aaa54dc4-8122-4246-99e8-afd711e3102d) successfully added.

# 添加网卡eno50332216：设备类型：bond-slave；连接名称：bond0-p2；master：bond0
[root@test03 network-scripts]# nmcli connection add type bond-slave ifname eno50332216 con-name bond0-p2 master bond0 
Connection 'bond0-p2' (11e38097-2273-4565-bf1c-3ce2e2e2a0ea) successfully added.
 
  
配置完成后，此时会在/etc/sysconfig/network-scripts目录下生成ifcfg-bond0-p1,ifcfg-bond0-p2的配置文件：
 
  
[root@test03 network-scripts]# cat ifcfg-bond0-p1 
TYPE=Ethernet
NAME=bond0-p1
UUID=aaa54dc4-8122-4246-99e8-afd711e3102d
DEVICE=eno33554992
ONBOOT=yes
MASTER=bond0
SLAVE=yes
[root@test03 network-scripts]# 
[root@test03 network-scripts]# cat ifcfg-bond0-p2
TYPE=Ethernet
NAME=bond0-p2
UUID=11e38097-2273-4565-bf1c-3ce2e2e2a0ea
DEVICE=eno50332216
ONBOOT=yes
MASTER=bond0
SLAVE=yes
 
  
激活bond0及其子接口
查看当前已激活的网络接口：
 
  
[root@test03 network-scripts]# nmcli connection show --active 
NAME         UUID                                  TYPE            DEVICE      
eno16777736  613db14a-2375-4a89-b55a-d2abd8fc65d5  802-3-ethernet  eno16777736 
bond0-p2     11e38097-2273-4565-bf1c-3ce2e2e2a0ea  802-3-ethernet  eno50332216 
bond0-p1     aaa54dc4-8122-4246-99e8-afd711e3102d  802-3-ethernet  eno33554992 
bond0        dc55d681-0d5a-4de2-8e94-0e5cb2e249c9  bond            bond0
 
  
如果bond0-p1、bond0-p2、bond0没有激活，可使用下面命令进行激活：
 
  
[root@test03 network-scripts]# nmcli connection up bond0-p1
[root@test03 network-scripts]# nmcli connection up bond0-p2
[root@test03 network-scripts]# nmcli connection up bond0
 
  
bonding状态查看
 
  
[root@test03 network-scripts]# cd /proc/net/bonding/
[root@test03 bonding]# ls
bond0
[root@test03 bonding]# cat bond0 
Ethernet Channel Bonding Driver: v3.7.1 (April 27, 2011)

Bonding Mode: fault-tolerance (active-backup)
Primary Slave: eno33554992 (primary_reselect always)
Currently Active Slave: eno33554992
MII Status: up
MII Polling Interval (ms): 100
Up Delay (ms): 0
Down Delay (ms): 0

Slave Interface: eno33554992
MII Status: up
Speed: 1000 Mbps
Duplex: full
Link Failure Count: 0
Permanent HW addr: 00:0c:29:56:69:57
Slave queue ID: 0

Slave Interface: eno50332216
MII Status: up
Speed: 1000 Mbps
Duplex: full
Link Failure Count: 0
Permanent HW addr: 00:0c:29:56:69:61
Slave queue ID: 0
 
  
bonding切换测试
首先查看bond0当前状态：
 
  
[root@test03 network-scripts]# cd /proc/net/bonding/
[root@test03 bonding]# ls
bond0
[root@test03 bonding]# cat bond0 
Ethernet Channel Bonding Driver: v3.7.1 (April 27, 2011)

Bonding Mode: fault-tolerance (active-backup)
Primary Slave: eno33554992 (primary_reselect always)
Currently Active Slave: eno33554992
MII Status: up
MII Polling Interval (ms): 100
Up Delay (ms): 0
Down Delay (ms): 0

Slave Interface: eno33554992
MII Status: up
Speed: 1000 Mbps
Duplex: full
Link Failure Count: 0
Permanent HW addr: 00:0c:29:56:69:57
Slave queue ID: 0

Slave Interface: eno50332216
MII Status: up
Speed: 1000 Mbps
Duplex: full
Link Failure Count: 0
Permanent HW addr: 00:0c:29:56:69:61
Slave queue ID: 0
 
  
当前活跃网卡为主网卡：eno33554992，长ping bond0 IP地址：ping 192.168.231.200 -t，网络畅通，现在断开eno33554992的网络连接：
 
  
[root@test03 bonding]# nmcli connection down bond0-p1 
Connection 'bond0-p1' successfully deactivated (D-Bus active path: /org/freedesktop/NetworkManager/ActiveConnection/5)

# ping 192.168.231.200 -t
来自 192.168.231.200 的回复: 字节=32 时间=2ms TTL=64
来自 192.168.231.200 的回复: 字节=32 时间<1ms TTL=64
请求超时。
请求超时。
来自 192.168.231.200 的回复: 字节=32 时间<1ms TTL=64
来自 192.168.231.200 的回复: 字节=32 时间<1ms TTL=64
 
  
发现网络短暂断开后恢复(本次测试环境为虚拟机，真实物理机应该看不到网络断开连接的情况)，此时查看bond0状态为：
 
  
[root@test03 bonding]# cat bond0 
Ethernet Channel Bonding Driver: v3.7.1 (April 27, 2011)

Bonding Mode: fault-tolerance (active-backup)
Primary Slave: None
Currently Active Slave: eno50332216
MII Status: up
MII Polling Interval (ms): 100
Up Delay (ms): 0
Down Delay (ms): 0

Slave Interface: eno50332216
MII Status: up
Speed: 1000 Mbps
Duplex: full
Link Failure Count: 0
Permanent HW addr: 00:0c:29:56:69:61
Slave queue ID: 0
 
  
现在恢复eno33554992的网络连接：
 
  
[root@test03 bonding]# nmcli connection up bond0-p1 
Connection successfully activated (D-Bus active path: /org/freedesktop/NetworkManager/ActiveConnection/7)

# ping 192.168.231.200 -t
来自 192.168.231.200 的回复: 字节=32 时间=2ms TTL=64
来自 192.168.231.200 的回复: 字节=32 时间<1ms TTL=64
请求超时。
请求超时。
来自 192.168.231.200 的回复: 字节=32 时间<1ms TTL=64
来自 192.168.231.200 的回复: 字节=32 时间<1ms TTL=64
 
  
查看bond0工作状态为:
 
  
[root@test03 bonding]# cat bond0 
Ethernet Channel Bonding Driver: v3.7.1 (April 27, 2011)

Bonding Mode: fault-tolerance (active-backup)
Primary Slave: eno33554992 (primary_reselect always)
Currently Active Slave: eno33554992
MII Status: up
MII Polling Interval (ms): 100
Up Delay (ms): 0
Down Delay (ms): 0

Slave Interface: eno50332216
MII Status: up
Speed: 1000 Mbps
Duplex: full
Link Failure Count: 0
Permanent HW addr: 00:0c:29:56:69:61
Slave queue ID: 0

Slave Interface: eno33554992
MII Status: up
Speed: 1000 Mbps
Duplex: full
Link Failure Count: 0
Permanent HW addr: 00:0c:29:56:69:57
Slave queue ID: 0
https://blog.51cto.com/zaa47/1925791
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