配置LACP模式的链路聚合示例(交换机之间直连)
组网需求
如图3-26所示,SwitchA和SwitchB通过以太链路分别都连接VLAN10和VLAN20的网络,且SwitchA和SwitchB之间有较大的数据流量。用户希望SwitchA和SwitchB之间能够提供较大的链路带宽来使相同VLAN间互相通信。在两台Switch设备上配置LACP模式链路聚合组,提高两设备之间的带宽与可靠性,具体要求如下:
两条活动链路具有负载分担的能力。
两设备间的链路具有1条冗余备份链路,当活动链路出现故障时,备份链路替代故障链路,保持数据传输的可靠性。
同VLAN间可以相互通信。
操作步骤
- 在SwitchA上创建Eth-Trunk1并配置为LACP模式。SwitchB的配置与SwitchA类似,不再赘述
<HUAWEI> system-view [HUAWEI] sysname SwitchA [SwitchA] interface eth-trunk 1 [SwitchA-Eth-Trunk1] mode lacp [SwitchA-Eth-Trunk1] quit
- 配置SwitchA上的成员接口加入Eth-Trunk。SwitchB的配置与SwitchA类似,不再赘述
[SwitchA] interface gigabitethernet 1/0/1 [SwitchA-GigabitEthernet1/0/1] eth-trunk 1 [SwitchA-GigabitEthernet1/0/1] quit [SwitchA] interface gigabitethernet 1/0/2 [SwitchA-GigabitEthernet1/0/2] eth-trunk 1 [SwitchA-GigabitEthernet1/0/2] quit [SwitchA] interface gigabitethernet 1/0/3 [SwitchA-GigabitEthernet1/0/3] eth-trunk 1 [SwitchA-GigabitEthernet1/0/3] quit
- 在SwitchA上配置系统优先级为100,使其成为LACP主动端
[SwitchA] lacp priority 100
- 在SwitchA上配置活动接口上限阈值为2
[SwitchA] interface eth-trunk 1 [SwitchA-Eth-Trunk1] max active-linknumber 2 [SwitchA-Eth-Trunk1] quit
- 在SwitchA上配置接口优先级确定活动链路
[SwitchA] interface gigabitethernet 1/0/1 [SwitchA-GigabitEthernet1/0/1] lacp priority 100 [SwitchA-GigabitEthernet1/0/1] quit [SwitchA] interface gigabitethernet 1/0/2 [SwitchA-GigabitEthernet1/0/2] lacp priority 100 [SwitchA-GigabitEthernet1/0/2] quit
- 创建VLAN并将接口加入VLAN。
# 创建VLAN10和VLAN20并分别加入接口。SwitchB的配置与SwitchA类似,不再赘述。
[SwitchA] vlan batch 10 20 [SwitchA] interface gigabitethernet 1/0/4 [SwitchA-GigabitEthernet1/0/4] port link-type trunk [SwitchA-GigabitEthernet1/0/4] port trunk allow-pass vlan 10 [SwitchA-GigabitEthernet1/0/4] quit [SwitchA] interface gigabitethernet 1/0/5 [SwitchA-GigabitEthernet1/0/5] port link-type trunk [SwitchA-GigabitEthernet1/0/5] port trunk allow-pass vlan 20 [SwitchA-GigabitEthernet1/0/5] quit
# 配置Eth-Trunk1接口允许VLAN10和VLAN20通过。SwitchB的配置与SwitchA类似,不再赘述。
[SwitchA] interface eth-trunk 1 [SwitchA-Eth-Trunk1] port link-type trunk [SwitchA-Eth-Trunk1] port trunk allow-pass vlan 10 20 [SwitchA-Eth-Trunk1] quit
- 验证配置结果
# 查看各Switch设备的Eth-Trunk信息,查看链路是否协商成功。
[SwitchA] display eth-trunk 1 Eth-Trunk1's state information is: Local: LAG ID: 1 WorkingMode: LACP Preempt Delay: Disabled Hash arithmetic: According to SIP-XOR-DIP System Priority: 100 System ID: 00e0-fca8-0417 Least Active-linknumber: 1 Max Active-linknumber: 2 Operate status: up Number Of Up Port In Trunk: 2 -------------------------------------------------------------------------------- ActorPortName Status PortType PortPri PortNo PortKey PortState Weight GigabitEthernet1/0/1 Selected 1GE 100 6145 2865 11111100 1 GigabitEthernet1/0/2 Selected 1GE 100 6146 2865 11111100 1 GigabitEthernet1/0/3 Unselect 1GE 32768 6147 2865 11100000 1 Partner: -------------------------------------------------------------------------------- ActorPortName SysPri SystemID PortPri PortNo PortKey PortState GigabitEthernet1/0/1 32768 00e0-fca6-7f85 32768 6145 2609 11111100 GigabitEthernet1/0/2 32768 00e0-fca6-7f85 32768 6146 2609 11111100 GigabitEthernet1/0/3 32768 00e0-fca6-7f85 32768 6147 2609 11110000
[SwitchB] display eth-trunk 1 Eth-Trunk1's state information is: Local: LAG ID: 1 WorkingMode: LACP Preempt Delay: Disabled Hash arithmetic: According to SIP-XOR-DIP System Priority: 32768 System ID: 00e0-fca6-7f85 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 GigabitEthernet1/0/1 Selected 1GE 32768 6145 2609 11111100 1 GigabitEthernet1/0/2 Selected 1GE 32768 6146 2609 11111100 1 GigabitEthernet1/0/3 Unselect 1GE 32768 6147 2609 11100000 1 Partner: -------------------------------------------------------------------------------- ActorPortName SysPri SystemID PortPri PortNo PortKey PortState GigabitEthernet1/0/1 100 00e0-fca8-0417 100 6145 2865 11111100 GigabitEthernet1/0/2 100 00e0-fca8-0417 100 6146 2865 11111100 GigabitEthernet1/0/3 100 00e0-fca8-0417 32768 6147 2865 11110000
通过以上显示信息可以看到,SwitchA的系统优先级为100,高于SwitchB的系统优先级。Eth-Trunk的成员接口中GigabitEthernet1/0/1、GigabitEthernet1/0/2成为活动接口,处于“Selected”状态,接口GigabitEthernet1/0/3处于“Unselect”状态,同时实现M条链路的负载分担和N条链路的冗余备份功能。
配置文件
SwitchA的配置文件
# sysname SwitchA # vlan batch 10 20 # lacp priority 100 # interface Eth-Trunk1 port link-type trunk port trunk allow-pass vlan 10 20 mode lacp max active-linknumber 2 # interface GigabitEthernet1/0/1 eth-trunk 1 lacp priority 100 # interface GigabitEthernet1/0/2 eth-trunk 1 lacp priority 100 # interface GigabitEthernet1/0/3 eth-trunk 1 # interface GigabitEthernet1/0/4 port link-type trunk port trunk allow-pass vlan 10 # interface GigabitEthernet1/0/5 port link-type trunk port trunk allow-pass vlan 20 # return
SwitchB的配置文件
# sysname SwitchB # vlan batch 10 20 # interface Eth-Trunk1 port link-type trunk port trunk allow-pass vlan 10 20 mode lacp # interface GigabitEthernet1/0/1 eth-trunk 1 # interface GigabitEthernet1/0/2 eth-trunk 1 # interface GigabitEthernet1/0/3 eth-trunk 1 # interface GigabitEthernet1/0/4 port link-type trunk port trunk allow-pass vlan 10 # interface GigabitEthernet1/0/5 port link-type trunk port trunk allow-pass vlan 20 # return