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配置lagg, 實(shí)現(xiàn)cisco 2950 與Freebsd 7.0鏈路聚合筆記

lagg 支持 IEEE 802.3ad 鏈路聚合控制協(xié)議 (LACP) 和標(biāo)記協(xié)議。 LACP 能夠在節(jié)點(diǎn)與若干鏈路聚合組之間協(xié)商鏈路。每一個(gè)鏈路聚合組 (LAG) 由一組相同速度、以全雙工模式運(yùn)行的網(wǎng)口組成。流量在 LAG 中的網(wǎng)口之間，會(huì)以總速度最大的原則進(jìn)行分?jǐn)?。?dāng)物理鏈路發(fā)生變化時(shí)，鏈路聚合會(huì)迅速適應(yīng)變動(dòng)形成新的配置。

一、調(diào)入lagg內(nèi)核模塊
方法1. 加入內(nèi)核并重編和加載,我用此方法來實(shí)現(xiàn)
device lagg

方法2.以module調(diào)入(kldload), 注意調(diào)入前先確認(rèn)lagg.ko模塊存在于/boot/kernel/
if_lagg_load="YES"

二、在rc.conf下配置lagg。
假設(shè)網(wǎng)卡標(biāo)識(shí)為bge0和bge1

ifconfig_bge0="up"
ifconfig_bge1="up"
cloned_interfaces="lagg0"
ifconfig_lagg0="laggproto lacp laggport bge0 laggport bge1 192.168.10.21 netmask 255.255.255.0"

三、cisco 2950下配置channel-protocol和channel-group.
# show run 的有關(guān)channel-protocol的內(nèi)容
interface FastEthernet0/23
channel-group 6 mode active
channel-protocol lacp
!
interface FastEthernet0/24
channel-group 6 mode active
channel-protocol lacp
!

具體配置:
# enable
# conf t
# int fa0/24
# channel-protocol lacp
# channel-group 6 mode active
# exit
# int fa0/23
# channel-protocol lacp
# channel-group 6 mode active
# exit
# exit
# write

四、重啟pc, 這樣就可以實(shí)現(xiàn)FreeBSD 的兩個(gè)網(wǎng)口作為一個(gè)負(fù)載均衡和故障轉(zhuǎn)移鏈路聚合組接到交換機(jī)上。
A. FreeBSD上的狀態(tài).
#ifconfig
root@s2[~]# ifconfig
bge0: flags=8843UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> metric 0 mtu 1500
        options=9bRXCSUM,TXCSUM,VLAN_MTU,VLAN_HWTAGGING,VLAN_HWCSUM>
        ether 00:0f:20:32:5a:af
        media: Ethernet autoselect (100baseTX full-duplex>)
        status: active
        lagg: laggdev lagg0
bge1: flags=8843UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> metric 0 mtu 1500
        options=9bRXCSUM,TXCSUM,VLAN_MTU,VLAN_HWTAGGING,VLAN_HWCSUM>
        ether 00:0f:20:32:5a:af
        media: Ethernet autoselect (100baseTX full-duplex>)
        status: active
        lagg: laggdev lagg0
lo0: flags=8049UP,LOOPBACK,RUNNING,MULTICAST> metric 0 mtu 16384
        inet 127.0.0.1 netmask 0xff000000
lagg0: flags=8843UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> metric 0 mtu 1500
        options=9bRXCSUM,TXCSUM,VLAN_MTU,VLAN_HWTAGGING,VLAN_HWCSUM>
        ether 00:0f:20:32:5a:af
        inet 192.168.10.21 netmask 0xffffff00 broadcast 192.168.10.255
        media: Ethernet autoselect
        status: active
        laggproto lacp
        laggport: bge1 flags=1cACTIVE,COLLECTING,DISTRIBUTING>
        laggport: bge0 flags=1cACTIVE,COLLECTING,DISTRIBUTING>

B. 在交換機(jī)上的狀態(tài).
swicth#show lacp 6 neighbor
Flags:  S - Device is requesting Slow LACPDUs
        F - Device is requesting Fast LACPDUs
        A - Device is in Active mode       P - Device is in Passive mode

Channel group 6 neighbors

Partner's information:

                  LACP port                        Oper    Port     Port
Port      Flags   Priority  Dev ID         Age     Key     Number   State
Fa0/23    SA      32768     000f.2032.5aaf   3s    0x86    0x1      0x3D
Fa0/24    SA      32768     000f.2032.5aaf   5s    0x86    0x2      0x3D

swicth#show lacp 6 counters
             LACPDUs         Marker      Marker Response    LACPDUs
Port       Sent   Recv     Sent   Recv     Sent   Recv      Pkts Err
---------------------------------------------------------------------
Channel group: 6
Fa0/23      2816   2603     0      1        1      0         0    ## 這里可以看到流量是平均分擔(dān)的.
Fa0/24      2818   2605     0      3        3      0         0

標(biāo)簽：云南錫林郭勒盟宿州天水無錫萍鄉(xiāng) 合肥克拉瑪依

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