· 掌握接口速率的配置方法

· 掌握使用手动模式配置链路聚合的方法

· 掌握使用静态LACP模式配置链路聚合的方法

· 掌握在静态LACP模式下配置接口优先级的方法

图4.1 以太网链路聚合拓扑图

您是公司的网络管理员。现在公司购买了两台华为的S5700系列的交换机，为了提高交换机之间链路带宽以及可靠性，您需要在交换机上配置链路聚合功能。

步骤一 以太网交换机基础配置

华为交换机接口默认开启了自协商功能。

首先修改交换机的设备名称，然后查看SW1上G0/0/9和G0/0/10接口的详细信息。


<Huawei>system-view
[Huawei]sysname SW1
[SW1]

[SW1]display interface GigabitEthernet 0/0/9
GigabitEthernet0/0/9 current state : UP
Line protocol current state : UP
Description:
Switch Port, Link-type : trunk(negotiated),
PVID :    1, TPID : 8100(Hex), The Maximum Frame Length is 9216
IP Sending Frames' Format is PKTFMT_ETHNT_2, Hardware address is d0d0-4ba6-aab0
Current system time: 2019-11-23 14:18:37
Port Mode: COMMON COPPER
Speed : 1000,   Loopback: NONE
Duplex: FULL,   Negotiation: ENABLE
Mdi   : AUTO,   Flow-control: DISABLE
Last 300 seconds input rate 256 bits/sec, 0 packets/sec
Last 300 seconds output rate 912 bits/sec, 0 packets/sec
Input peak rate 13976 bits/sec, Record time: 2019-11-22 14:59:12
Output peak rate 13976 bits/sec, Record time: 2019-11-22 14:59:12
……output omit……[SW1]display interface GigabitEthernet 0/0/10
GigabitEthernet0/0/10 current state : UP
Line protocol current state : UP
Description:
Switch Port, Link-type : trunk(negotiated),
PVID :    1, TPID : 8100(Hex), The Maximum Frame Length is 9216
IP Sending Frames' Format is PKTFMT_ETHNT_2, Hardware address is d0d0-4ba6-aab0
Current system time: 2019-11-23 14:22:22
Port Mode: COMMON COPPER
Speed : 1000,   Loopback: NONE
Duplex: FULL,   Negotiation: ENABLE
Mdi   : AUTO,   Flow-control: DISABLE
Last 300 seconds input rate 72 bits/sec, 0 packets/sec
Last 300 seconds output rate 1024 bits/sec, 0 packets/sec
Input peak rate 14032 bits/sec, Record time: 2019-11-22 14:59:12
Output peak rate 14032 bits/sec, Record time: 2019-11-22 14:59:12
……output omit……

步骤二 配置手动模式的链路聚合

在SW1和SW2上创建Eth-Trunk 1，然后将G0/0/9和G0/0/10接口加入Eth-Trunk 1（注意：将接口加入Eth-Trunk前需确认成员接口下没有任何配置）。


[SW1]interface Eth-Trunk 1
[SW1-Eth-Trunk1]quit
[SW1]interface GigabitEthernet 0/0/9
[SW1-GigabitEthernet0/0/9]eth-trunk 1
[SW1-GigabitEthernet0/0/9]quit
[SW1]interface GigabitEthernet 0/0/10
[SW1-GigabitEthernet0/0/10]eth-trunk 1[SW2]interface Eth-Trunk 1
[SW2-Eth-Trunk1]quit
[SW2]interface GigabitEthernet 0/0/9
[SW2-GigabitEthernet0/0/9]eth-trunk 1
[SW2-GigabitEthernet0/0/9]quit
[SW2]interface GigabitEthernet 0/0/10
[SW2-GigabitEthernet0/0/10]eth-trunk 1

验证Eth-Trunk的配置结果。


[SW1]display eth-trunk 1
Eth-Trunk1's state information is:
WorkingMode: NORMAL         Hash arithmetic: According to SIP-XOR-DIP
Least Active-linknumber: 1  Max Bandwidth-affected-linknumber: 8
Operate status: up          Number Of Up Port In Trunk: 2
----------------------------------------------------------------------------
PortName                      Status      Weight
GigabitEthernet0/0/9            Up             1
GigabitEthernet0/0/10           Up             1        [SW2]display eth-trunk 1
Eth-Trunk1's state information is:
WorkingMode: NORMAL         Hash arithmetic: According to SIP-XOR-DIP
Least Active-linknumber: 1  Max Bandwidth-affected-linknumber: 8
Operate status: up          Number Of Up Port In Trunk: 2
----------------------------------------------------------------------------
PortName                      Status      Weight
GigabitEthernet0/0/9            Up            1
GigabitEthernet0/0/10           Up            1

回显信息中灰色阴影标注的部分表明Eth-Trunk工作正常，成员接口都已正确加入。

在SW1上查看接口聚合后带宽


[SW1]display interface Eth-Trunk 1
Eth-Trunk1 current state : UP
Line protocol current state : UP
Description:
Switch Port, PVID :    1, Hash arithmetic : According to SIP-XOR-DIP,Maximal BW: 2G, Current BW: 2G, The Maximum Frame Length is 9216
IP Sending Frames' Format is PKTFMT_ETHNT_2, Hardware address is 4c1f-cc16-05ac
Current system time: 2020-03-15 15:33:56-08:00Input bandwidth utilization  :    0%Output bandwidth utilization :    0%
-------------------------------------------------------------------
PortName                      Status      Weight
-------------------------------------------------------------------
GigabitEthernet0/0/9             UP          1
GigabitEthernet0/0/10            UP          1
-------------------------------------------------------------------
The Number of Ports in Trunk : 2
The Number of UP Ports in Trunk : 2在SW2上查看接口聚合后带宽
[SW2]display interface Eth-Trunk 1
Eth-Trunk1 current state : UP
Line protocol current state : UP
Description:
Switch Port, PVID :    1, Hash arithmetic : According to SIP-XOR-DIP,Maximal BW: 2G, Current BW: 2G, The Maximum Frame Length is 9216
IP Sending Frames' Format is PKTFMT_ETHNT_2, Hardware address is 4c1f-cc78-50fb
Current system time: 2020-03-15 15:35:33-08:00Input bandwidth utilization  :    0%Output bandwidth utilization :    0%
-------------------------------------------------------------------
PortName                      Status      Weight
-------------------------------------------------------------------
GigabitEthernet0/0/9             UP          1
GigabitEthernet0/0/10            UP          1
-------------------------------------------------------------------
The Number of Ports in Trunk : 2
The Number of UP Ports in Trunk : 2

步骤三 配置静态LACP模式的链路聚合

删除SW1和SW2上的G0/0/9和G0/0/10接口下的配置。


[SW1]interface GigabitEthernet 0/0/9
[SW1-GigabitEthernet0/0/9]undo eth-trunk
[SW1-GigabitEthernet0/0/9]quit
[SW1]interface GigabitEthernet 0/0/10
[SW1-GigabitEthernet0/0/10]undo eth-trunk[SW2]interface GigabitEthernet 0/0/9
[SW2-GigabitEthernet0/0/9]undo eth-trunk
[SW2-GigabitEthernet0/0/9]quit
[SW2]interface GigabitEthernet 0/0/10
[SW2-GigabitEthernet0/0/10]undo eth-trunk

创建Eth-Trunk 1并配置该Eth-Trunk为静态LACP模式。然后将G0/0/9和G0/0/10接口加入Eth-Trunk 1。


[SW1]interface Eth-Trunk 1
[SW1-Eth-Trunk1]mode lacp
[SW1-Eth-Trunk1]quit
[SW1]interface GigabitEthernet 0/0/9
[SW1-GigabitEthernet0/0/9]eth-trunk 1
[SW1-GigabitEthernet0/0/9]quit
[SW1]interface GigabitEthernet 0/0/10
[SW1-GigabitEthernet0/0/10]eth-trunk 1[SW2]interface Eth-Trunk 1
[SW2-Eth-Trunk1]mode lacp
[SW2-Eth-Trunk1]quit
[SW2]interface GigabitEthernet 0/0/9
[SW2-GigabitEthernet0/0/9]eth-trunk 1
[SW2-GigabitEthernet0/0/9]quit
[SW2]interface GigabitEthernet 0/0/10
[SW2-GigabitEthernet0/0/10]eth-trunk 1

查看交换机上Eth-Trunk的信息，查看链路是否协商成功。


[SW1]disp eth-trunk 1
Eth-Trunk1's state information is:
Local:
LAG ID: 1                   WorkingMode: STATIC
Preempt Delay: Disabled     Hash arithmetic: According to SIP-XOR-DIP
System Priority: 32768      System ID: 4c1f-cc16-05ac
Least Active-linknumber: 1  Max Active-linknumber: 8
Operate status: up          Number Of Up Port In Trunk: 2
--------------------------------------------------------------------------------
ActorPortName          Status   PortType PortPri PortNo PortKey PortState Weight
GigabitEthernet0/0/9   Selected   1GE      32768   10     305     10111100  1
GigabitEthernet0/0/10  Selected   1GE      32768   11     305     10111100  1     Partner:
--------------------------------------------------------------------------------
ActorPortName          SysPri   SystemID        PortPri PortNo PortKey PortState
GigabitEthernet0/0/9   32768    4c1f-cc78-50fb  32768   10     305     10111100
GigabitEthernet0/0/10  32768    4c1f-cc78-50fb  32768   11     305     10111100[SW2]display eth-trunk 1
Eth-Trunk1's state information is:
Local:
LAG ID: 1                   WorkingMode: STATIC
Preempt Delay: Disabled     Hash arithmetic: According to SIP-XOR-DIP
System Priority: 32768      System ID: 4c1f-cc78-50fb
Least Active-linknumber: 1  Max Active-linknumber: 8
Operate status: up          Number Of Up Port In Trunk: 2
--------------------------------------------------------------------------------
ActorPortName          Status   PortType PortPri PortNo PortKey PortState Weight
GigabitEthernet0/0/9   Selected   1GE      32768   10     305     10111100  1
GigabitEthernet0/0/10  Selected   1GE      32768   11     305     10111100  1     Partner:
--------------------------------------------------------------------------------
ActorPortName          SysPri   SystemID        PortPri PortNo PortKey PortState
GigabitEthernet0/0/9   32768    4c1f-cc16-05ac  32768   10     305     10111100
GigabitEthernet0/0/10  32768    4c1f-cc16-05ac  32768   11     305     10111100

在SW1上配置LACP的系统优先级为100，使其成为LACP主动端。

[SW1]lacp  priority 100

配置接口的优先级确定活动链路。


[SW1]interface GigabitEthernet 0/0/9
[SW1-GigabitEthernet0/0/9]lacp priority 100
[SW1-GigabitEthernet0/0/9]quit
[SW1]interface GigabitEthernet 0/0/10
[SW1-GigabitEthernet0/0/10]lacp priority 100

验证Eth-Trunk的配置结果。


[SW1]display eth-trunk 1
Eth-Trunk1's state information is:
Local:
LAG ID: 1                   WorkingMode: STATIC
Preempt Delay: Disabled     Hash arithmetic: According to SIP-XOR-DIP
System Priority: 100        System ID: 4c1f-cc16-05ac
Least Active-linknumber: 1  Max Active-linknumber: 8
Operate status: up          Number Of Up Port In Trunk: 2
--------------------------------------------------------------------------------
ActorPortName          Status   PortType PortPri PortNo PortKey PortState Weight
GigabitEthernet0/0/9   Selected 1GE        100     10     305     10111100  1
GigabitEthernet0/0/10  Selected 1GE        100     11     305     10111100  1     Partner:
--------------------------------------------------------------------------------
ActorPortName          SysPri   SystemID        PortPri PortNo PortKey PortState
GigabitEthernet0/0/9   32768    4c1f-cc78-50fb  32768   10     305     10111100
GigabitEthernet0/0/10  32768    4c1f-cc78-50fb  32768   11     305     10111100[SW2]display eth-trunk 1
Eth-Trunk1's state information is:
Local:
LAG ID: 1                   WorkingMode: STATIC
Preempt Delay: Disabled     Hash arithmetic: According to SIP-XOR-DIP
System Priority: 32768      System ID: 4c1f-cc78-50fb
Least Active-linknumber: 1  Max Active-linknumber: 8
Operate status: up          Number Of Up Port In Trunk: 2
--------------------------------------------------------------------------------
ActorPortName          Status   PortType PortPri PortNo PortKey PortState Weight
GigabitEthernet0/0/9   Selected 1GE      32768   10     305     10111100  1
GigabitEthernet0/0/10  Selected 1GE      32768   11     305     10111100  1
Partner:
--------------------------------------------------------------------------------
ActorPortName          SysPri   SystemID        PortPri PortNo PortKey     PortState
GigabitEthernet0/0/9     100      4c1f-cc16-05ac    100     10     305     10111100
GigabitEthernet0/0/10    100      4c1f-cc16-05ac    100     11     305     10111100

配置文件


[SW1]display current-configuration
[SW2]display current-configuration

end

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