bond4 交换机配置_linux双网卡绑定上联交换机配置

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Linux下双网卡绑定七种模式

现在一般的企业都会使用双网卡接入,62616964757a686964616fe59b9ee7ad9431333337613838这样既能添加网络带宽,同时又能做相应的冗余,可以说是好处多多。而一般企业都会使用linux操作系统下自带的网卡绑定模式,当然现在网卡产商也会出一些针对windows操作系统网卡管理软件来做网卡绑定(windows操作系统没有网卡绑定功能 需要第三方支持)。进入正题,linux有七种网卡绑定模式:0. round robin,1.active-backup,2.load balancing (xor), 3.fault-tolerance (broadcast), 4.lacp, 5.transmit load balancing, 6.adaptive load balancing。

第一种:bond0:round robin

标准:round-robin policy: Transmit packets in sequential order from the first available slave through the last. This mode provides load balancing and fault tolerance.

特点:(1)所有链路处于负载均衡状态,轮询方式往每条链路发送报文,基于per packet方式发送。服务上ping 一个相同地址:1.1.1.1 双网卡的两个网卡都有流量发出。负载到两条链路上,说明是基于per packet方式 ,进行轮询发送。(2)这模式的特点增加了带宽,同时支持容错能力,当有链路出问题,会把流量切换到正常的链路上。

实际绑定结果:

cat /proc/net/bonding/bond0

Ethernet Channel Bonding Driver: v3.6.0 (September 26, 2009)

Bonding Mode: load balancing (round-robin)  -----RR的模式

MII Status: up

MII Polling Interval (ms): 100

Up Delay (ms): 0

Down Delay (ms): 0

Slave Interface: eth0

MII Status: up

Link Failure Count: 0

Permanent HW addr: 74:ea:3a:6a:54:e3

Slave Interface: eth1

MII Status: up

Link Failure Count: 0

应用拓扑:交换机端需要配置聚合口,cisco叫port channel

第二种:bond1:active-backup

标准文档定义:Active-backup policy: Only one slave in the bond is active. A different slave becomes active if, and only if, the active slave fails. The bond’s MAC address is externally visible on only one port (network adapter) to avoid confusing the switch. This mode provides fault tolerance. The primary option affects the behavior of this mode.

模式的特点:一个端口处于主状态 ,一个处于从状态,所有流量都在主链路上处理,从不会有任何流量。当主端口down掉时,从端口接手主状态。

实际绑定结果:

root@1:~# cat /proc/net/bonding/bond0

Ethernet Channel Bonding Driver: v3.6.0 (September 26, 2009)

Bonding Mode: fault-tolerance (active-backup) —–backup模式

Primary Slave: None

Currently Active Slave: eth0

MII Status: up

MII Polling Interval (ms): 100

Up Delay (ms): 0

Down Delay (ms): 0

Slave Interface: eth0

MII Status: up

Link Failure Count: 0

Permanent HW addr: 74:ea:3a:6a:54:e3

Slave Interface: eth1

MII Status: up

Link Failure Count: 0

Permanent HW addr: d8:5d:4c:71:f9:94

应用拓扑:这种模式接入不需要交换机端支持,随便怎么接入都行。

第三种:bond2:load balancing (xor)

标准文档描述:XOR policy: Transmit based on [(source MAC address XOR'd with destination MAC address) modulo slave count]. This selects the same slave for each destination MAC address. This mode provides load balancing and fault tolerance.

特点:该模式将限定流量,以保证到达特定对端的流量总是从同一个接口上发出。既然目的地是通过MAC地址来决定的,因此该模式在“本地”网络配置下可以工作得很好。如果所有流量是通过单个路由器(比如 “网关”型网络配置,只有一个网关时,源和目标mac都固定了,那么这个算法算出的线路就一直是同一条,那么这种模式就没有多少意义了。),那该模式就不是最好的选择。和balance-rr一样,交换机端口需要能配置为“port channel”。这模式是通过源和目标mac做hash因子来做xor算法来选路的。

实际绑定结果:

[root@localhost ~]# cat /proc/net/bonding/bond0

Ethernet Channel Bonding Driver: v3.0.3 (March 23, 2006)

Bonding Mode: load balancing (xor) ——配置为xor模式

Transmit Hash Policy: layer2 (0)

MII Status: up

MII Polling Interval (ms): 100

Up Delay (ms): 0

Down Delay (ms): 0

Slave Interface: eth1

MII Status: up

Link Failure Count: 0

Permanent HW addr: 00:d0:f8:40:f1:a0

Slave Interface: eth2

MII Status: up

Link Failure Count: 0

Permanent HW addr: 00:d0:f8:00:0c:0c

应用拓扑:同bond0一样的应用模型。这个模式也需要交换机配置聚合口。

第四种:bond3:fault-tolerance (broadcast)

标准文档定义:Broadcast policy: transmits everything on all slave interfaces. This mode provides fault tolerance.

特点:这种模式的特点是一个报文会复制两份往bond下的两个接口分别发送出去,当有对端交换机失效,我们感觉不到任何downtime,但此法过于浪费资源;不过这种模式有很好的容错机制。此模式适用于金融行业,因为他们需要高可靠性的网络,不允许出现任何问题。

实际绑定结果:

root@ubuntu12:~/ram# cat /proc/net/bonding/bond0

Ethernet Channel Bonding Driver: v3.6.0 (September 26, 2009)

Bonding Mode: fault-tolerance (broadcast) ——- fault-tolerance 模式

MII Status: up

MII Polling Interval (ms): 100

Up Delay (ms): 0

Down Delay (ms): 0

Slave Interface: eth0

MII Status: up

Link Failure Count: 0

Permanent HW addr: 74:ea:3a:6a:54:e3

Slave Interface: eth1

MII Status: up

Link Failure Count: 0

Permanent HW addr: d8:5d:4c:71:f9:94

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