【菜鸟IT】如何提高企业交换机之间的链路带宽和可靠性？（上）

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拓扑图

图4.1 以太网链路聚合拓扑图

场景

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。

操作步骤

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……

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 15:33:56-08:00

Input 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 15:35:33-08:00

Input 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

下集预告：配置静态LACP模式的链路聚合