Channel Bonding Interface的配置

    今天遇到一个Channel bonding的问题，先说说Channel bonding这个东西。Channel bonding使用二块或者更多的Network interfaces来组成一块，同时也提升了带宽，提供冗余。

    下面就说说怎么创建一个Channel bonding interface。涉及到下面几个文件：

/etc/sysconfig/network-scripts/ifcfg-bond0
/etc/sysconfig/network-scripts/ifcfg-eth0
/etc/sysconfig/network-scripts/ifcfg-eth1
/etc/modprobe.conf

    ifcfg-bond0是bond0的配置文件，我的配置是这样的：

DEVICE=bond0
IPADDR=10.16.65.43
NETMASK=255.255.248.0
ONBOOT=yes
BOOTPROTO=dhcp
USERCTL=no
BONDING_OPTS="mode=1 miimon=50"

    这里需要注意的一点是BOOTPROTO的配置，这里应该和你的原始ifcfg-eth0的里面的BOOTPROTO一样。我最开始的时候在这里配错了，结果死活起不来网络！

    然后就是ifcfg-eth0了，这个文件是第一块以太网卡的配置文件，一般是这样的：

# Broadcom Corporation NetXtreme BCM5755 Gigabit Ethernet PCI Express
DEVICE=eth0
BOOTPROTO=dhcp
HWADDR=00:1E:0B:A3:A5:F4
ONBOOT=yes

    需要修改成这样：

# Broadcom Corporation NetXtreme BCM5755 Gigabit Ethernet PCI Express
DEVICE=eth0
BOOTPROTO=none
HWADDR=00:1E:0B:A3:A5:F4
ONBOOT=yes
MASTER=bond0
SLAVE=yes
USERCTL=no

    看配置文件就明白了，这里把eth0设置成了bond0的一个SLAVE！同样的，需要设置另外一个SLAVE，可以是eth1也可以是别的，当然了随你高兴！这里是我的ifcfg-eth1：

# Broadcom Corporation NetXtreme BCM5755 Gigabit Ethernet PCI Express
DEVICE=eth1
BOOTPROTO=none
HWADDR=00:1E:0B:A3:A5:F3
ONBOOT=yes
MASTER=bond0
SLAVE=yes
USERCTL=no

    基本的网络配置就完成了，还有另外的一个文件需要修改！/etc/modprobe.conf！

    需要说明一下的是，在RHEL5里面，是存在这个文件的！但是，在Fedora 13是没有这个文件的！不过可以手动创建^_^

    加入以下内容：

alias bond0 bonding

    如果你建立了多块bond，比如bond0，bond1,bond2，那么就要这么写：

alias bond0 bonding
alias bond1 bonding
alias bond2 bonding

    到这，所有的配置就都完成了，重启电脑，查看一下网络吧o(∩∩)o...

[root@hp-xw8600-01 ~]# ifconfig -a
bond0     Link encap:Ethernet  HWaddr 00:1E:0B:A3:A5:F4
inet addr:10.16.65.43  Bcast:10.16.71.255  Mask:255.255.248.0
inet6 addr: fec0:0:a10:4000:21e:bff:fea3:a5f4/64 Scope:Site
inet6 addr: fe80::21e:bff:fea3:a5f4/64 Scope:Link
UP BROADCAST RUNNING MASTER MULTICAST  MTU:1500  Metric:1
RX packets:3000 errors:0 dropped:0 overruns:0 frame:0
TX packets:378 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:267901 (261.6 KiB)  TX bytes:51397 (50.1 KiB)

eth0      Link encap:Ethernet  HWaddr 00:1E:0B:A3:A5:F4
UP BROADCAST RUNNING SLAVE MULTICAST  MTU:1500  Metric:1
RX packets:3000 errors:0 dropped:0 overruns:0 frame:0
TX packets:378 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:267901 (261.6 KiB)  TX bytes:51397 (50.1 KiB)
Interrupt:209 Memory:f3300000-f3310000

eth1      Link encap:Ethernet  HWaddr 00:1E:0B:A3:A5:F4
UP BROADCAST SLAVE MULTICAST  MTU:1500  Metric:1
RX packets:0 errors:0 dropped:0 overruns:0 frame:0
TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:0 (0.0 b)  TX bytes:0 (0.0 b)
Interrupt:217 Memory:f3200000-f3210000

lo        Link encap:Local Loopback
inet addr:127.0.0.1  Mask:255.0.0.0
inet6 addr: ::1/128 Scope:Host
UP LOOPBACK RUNNING  MTU:16436  Metric:1
RX packets:8 errors:0 dropped:0 overruns:0 frame:0
TX packets:8 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:560 (560.0 b)  TX bytes:560 (560.0 b)

sit0      Link encap:IPv6-in-IPv4
NOARP  MTU:1480  Metric:1
RX packets:0 errors:0 dropped:0 overruns:0 frame:0
TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:0 (0.0 b)  TX bytes:0 (0.0 b)
[root@hp-xw8600-01 ~]# cat /proc/net/bonding/bond0
Ethernet Channel Bonding Driver: v3.4.0-1 (October 7, 2008)

Bonding Mode: fault-tolerance (active-backup)
Primary Slave: None
Currently Active Slave: eth0
MII Status: up
MII Polling Interval (ms): 50
Up Delay (ms): 0
Down Delay (ms): 0

Slave Interface: eth0
MII Status: up
Speed: 100 Mbps
Duplex: full
Link Failure Count: 0
Permanent HW addr: 00:1e:0b:a3:a5:f4

Slave Interface: eth1
MII Status: down
Speed: 100 Mbps
Duplex: full
Link Failure Count: 0
Permanent HW addr: 00:1e:0b:a3:a5:f3