怎樣進(jìn)行Linux雙網(wǎng)卡綁定一個IP（二）
Linux雙網(wǎng)卡邦定技術(shù)有兩個方面的好處：一是可以增加服務(wù)器的可靠性,二是增加了可用網(wǎng)絡(luò)帶寬,為用戶提供不間斷的關(guān)鍵服務(wù)。上面一篇我們說了具體的做法，這里我進(jìn)行一下具體的說明。
說明
miimon是用來進(jìn)行鏈路監(jiān)測的。 比如:miimon=100，那么系統(tǒng)每100ms監(jiān)測一次鏈路連接狀態(tài)，如果
有一條線路不通就轉(zhuǎn)入另一條線路
下面我們討論以下mode分別為0,1時的情況
mode=1工作在主備模式下,這時eth1作為備份網(wǎng)卡是no arp的
[root@rhas-13 network-scripts]# ifconfig 驗證網(wǎng)卡的配置信息
bond0 Link encap:Ethernet HWaddr 00:0E:7F:25:D9:8B
inet addr:172.31.0.13 Bcast:172.31.3.255 Mask:255.255.252.0
UP BROADCAST RUNNING MASTER MULTICAST MTU:1500 Metric:1
RX packets:18495 errors:0 dropped:0 overruns:0 frame:0
TX packets:480 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:1587253 (1.5 Mb) TX bytes:89642 (87.5 Kb)
eth0 Link encap:Ethernet HWaddr 00:0E:7F:25:D9:8B
inet addr:172.31.0.13 Bcast:172.31.3.255 Mask:255.255.252.0
UP BROADCAST RUNNING SLAVE MULTICAST MTU:1500 Metric:1
RX packets:9572 errors:0 dropped:0 overruns:0 frame:0
TX packets:480 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:833514 (813.9 Kb) TX bytes:89642 (87.5 Kb)
Interrupt:11
eth1 Link encap:Ethernet HWaddr 00:0E:7F:25:D9:8B
inet addr:172.31.0.13 Bcast:172.31.3.255 Mask:255.255.252.0
UP BROADCAST RUNNING NOARP SLAVE MULTICAST MTU:1500 Metric:1
RX packets:8923 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:753739 (736.0 Kb) TX bytes:0 (0.0 b)
Interrupt:15
那也就是說在主備模式下,當(dāng)一個網(wǎng)絡(luò)接口失效時(例如主交換機(jī)掉電等),不回出現(xiàn)網(wǎng)絡(luò)中斷,系統(tǒng)會按照cat /etc/rc.d/rc.local里指定網(wǎng)卡的順序工作,機(jī)器仍能對外服務(wù),起到了失效保護(hù)的功能.
在mode=0 負(fù)載均衡工作模式,他能提供兩倍的帶寬,下我們來看一下網(wǎng)卡的配置信息
[root@rhas-13 root]# ifconfig
bond0 Link encap:Ethernet HWaddr 00:0E:7F:25:D9:8B
inet addr:172.31.0.13 Bcast:172.31.3.255 Mask:255.255.252.0
UP BROADCAST RUNNING MASTER MULTICAST MTU:1500 Metric:1
RX packets:2817 errors:0 dropped:0 overruns:0 frame:0
TX packets:95 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:226957 (221.6 Kb) TX bytes:15266 (14.9 Kb)
eth0 Link encap:Ethernet HWaddr 00:0E:7F:25:D9:8B
inet addr:172.31.0.13 Bcast:172.31.3.255 Mask:255.255.252.0
UP BROADCAST RUNNING SLAVE MULTICAST MTU:1500 Metric:1
RX packets:1406 errors:0 dropped:0 overruns:0 frame:0
TX packets:48 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:113967 (111.2 Kb) TX bytes:7268 (7.0 Kb)
Interrupt:11
eth1 Link encap:Ethernet HWaddr 00:0E:7F:25:D9:8B
inet addr:172.31.0.13 Bcast:172.31.3.255 Mask:255.255.252.0
UP BROADCAST RUNNING SLAVE MULTICAST MTU:1500 Metric:1
RX packets:1411 errors:0 dropped:0 overruns:0 frame:0
TX packets:47 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:112990 (110.3 Kb) TX bytes:7998 (7.8 Kb)
Interrupt:15
在這種情況下出現(xiàn)一塊網(wǎng)卡失效,僅僅會是服務(wù)器出口帶寬下降,也不會影響網(wǎng)絡(luò)使用.
通過查看bond0的工作狀態(tài)查詢能詳細(xì)的掌握bonding的工作狀態(tài)
[root@rhas-13 bonding]# cat /proc/net/bonding/bond0
bonding.c:v2.4.1 (September 15, 2003)
Bonding Mode: load balancing (round-robin)
MII Status: up
MII Polling Interval (ms): 0
Up Delay (ms): 0
Down Delay (ms): 0
Multicast Mode: all slaves
Slave Interface: eth1
MII Status: up
Link Failure Count: 0
Permanent HW addr: 00:0e:7f:25:d9:8a
Slave Interface: eth0
MII Status: up
Link Failure Count: 0
Permanent HW addr: 00:0e:7f:25:d9:8b
這下差不多就對Linux雙網(wǎng)卡綁定技術(shù)有了一個相關(guān)的說明。
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