链路聚合配置有什么用（交换机链路聚合配置详解）
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1. 链路聚合——将多个物理端口捆绑成一个逻辑端口，对逻辑端口进行配置，提高链路带宽和备份能力。链路聚合一般用于核心交换机。建议将物理端口绑定为2的倍数。
2. 链路聚合模式有手动负载分担和LACP两种。在手动负载分担模式下，所有活动线路的端口都参与数据转发和流量共享；在LACP模式下，支持链路备份。
3.链路聚合的端口速率、接口数、双工模式、卡车或接入模式必须保持一致。
4. 请勿配置链路聚合端口。配置逻辑Eth-Trunk端口。
一、SW1配置：
[SW1]int Eth-Trunk 1
[SW1-Eth-Trunk1]int g0/0/23
[SW1-GigabitEthernet0/0/23]eth-trunk 1
[SW1-GigabitEthernet0/0/23]int g0/0/24
[SW1-GigabitEthernet0/0/24]eth-trunk 1
[SW1-GigabitEthernet0/0/24]q
[SW1]
[SW1]int et
[SW1]int Eth-Trunk 1
[SW1-Eth-Trunk1]port li
[SW1-Eth-Trunk1]port link-type tru
[SW1-Eth-Trunk1]port link-type trunk
[SW1-Eth-Trunk1]port trunk allow-pass vlan all
[SW1-Eth-Trunk1]disp th
#
interface Eth-Trunk1
port link-type trunk
port trunk allow-pass vlan 2 to 4094
#
[SW1]disp stp brief
MSTID Port Role STP State Protection
0 Eth-Trunk1 ROOT FORWARDING NONE
[SW2]disp int 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
GigabitEthernet0/0/23 Up 1
GigabitEthernet0/0/24 Up 1
[SW1]disp int 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-cc7c-16ef
Current system time: 2020-09-03 22:31:07-08:00
Input bandwidth utilization : 0%
Output bandwidth utilization : 0%
-----------------------------------------------------
PortName Status Weight
-----------------------------------------------------
GigabitEthernet0/0/23 UP 1
GigabitEthernet0/0/24 UP 1
-----------------------------------------------------
The Number of Ports in Trunk : 2
The Number of UP Ports in Trunk : 2
2SW2配置：
[SW2]int Eth-Trunk 1
[SW2-Eth-Trunk1]int g0/0/23
[SW2-GigabitEthernet0/0/23]eth-trunk 1
[SW2-GigabitEthernet0/0/23]int g0/0/24
[SW2-GigabitEthernet0/0/24]eth-trunk 1
[SW2-GigabitEthernet0/0/24]q
[SW2]
[SW2]int et
[SSW2]int Eth-Trunk 1
[SW2-Eth-Trunk1]port li
[SW2-Eth-Trunk1]port link-type tru
[SW2-Eth-Trunk1]port link-type trunk
[SW2-Eth-Trunk1]port trunk allow-pass vlan all
[SW2-Eth-Trunk1]disp th
#
interface Eth-Trunk1
port link-type trunk
port trunk allow-pass vlan 2 to 4094
#
[SW2]disp stp brief
MSTID Port Role STP State Protection
0 Eth-Trunk1 DESI FORWARDING NONE
[SW2]disp int 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
GigabitEthernet0/0/23 Up 1
GigabitEthernet0/0/24 Up 1
[SW2]disp int 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-cc2e-653e
Current system time: 2020-09-03 22:32:12-08:00
Input bandwidth utilization : 0%
Output bandwidth utilization : 0%
-----------------------------------------------------
PortName Status Weight
-----------------------------------------------------
GigabitEthernet0/0/23 UP 1
GigabitEthernet0/0/24 UP 1
-----------------------------------------------------
The Number of Ports in Trunk : 2
The Number of UP Ports in Trunk : 2
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