M-LAG组网简介
M-LAG（Multi-chassis Link Aggregation）技术是一种跨设备的链路聚合技术，它通过将两台交换机组成一个逻辑设备，实现链路的负载分担和故障切换，从而提高网络的可靠性和稳定性。下面给大家详细介绍如何在华为交换机上进行M-LAG配置。在配置M-LAG之前，我们需要确认交换机的型号是否支持M-LAG，如数据中心交换机CE58、CE68、CE88、CE98等等交换机都支持M-LAG技术。
如下图组网所示，多级M-LAG互联可以在保证可靠性、提供链路利用率的同时扩展双归接入的网络规模，满足客户的需求。同时汇聚交换机作为双活网关，接入与汇聚之间采用交叉连线方式，保证设备级可靠性。
组网图：
配置步骤
一、配置STP
1，配置SwitchA
一、配置STP
1，配置SwitchA
[SwitchA] stp bridge-address 0000-0000-1111 //M_LAG中node 1 与node 2 生成树mac地址保持一致
[SwitchA] stp mode rstp
[SwitchA] stp tc-protection enable
[SwitchA] stp bpdu-protection enable
[SwitchA] stp v-stp enable2，配置SwitchB
[SwitchB] stp bridge-address 0000-0000-1111 //M_LAG中node 1 与node 2 生成树mac地址保持一致
[SwitchB] stp mode rstp
[SwitchB] stp tc-protection enable
[SwitchB] stp bpdu-protection enable
[SwitchB] stp v-stp enable3，配置SwitchC
[SwitchC] stp bridge-address 0000-0000-2222 //M_LAG中node 1 与node 2 生成树mac地址保持一致
[SwitchC] stp mode rstp
[SwitchC] stp tc-protection enable
[SwitchC] stp bpdu-protection enable
[SwitchC] stp v-stp enable4，配置SwitchD
[SwitchD] stp bridge-address 0000-0000-2222 //M_LAG中node 1 与node 2 生成树mac地址保持一致
[SwitchD] stp mode rstp
[SwitchD] stp tc-protection enable
[SwitchD] stp bpdu-protection enable
[SwitchD] stp v-stp enable二、配置DFS Group
1，配置SwitchA
[SwitchA] interface meth 0/0/0
[SwitchA]-MEth0/0/0] ip address 10.1.1.1 24 //带外管理接口ip用作m-lag双住检测源
[SwitchA] dfs-group 1
[SwitchA-dfs-group-1] dual-active detection source-ip 10.1.1.1 peer 10.1.1.2
[SwitchA-dfs-group-1] priority 150
[SwitchA-dfs-group-1] quit2，配置SwitchB
[SwitchB] interface meth 0/0/0
[SwitchB]-MEth0/0/0] ip address 10.1.1.2 24 //带外管理接口ip用作m-lag双住检测源
[SwitchB] dfs-group 1
[SwitchB-dfs-group-1] dual-active detection source-ip 10.1.1.2 peer 10.1.1.1
[SwitchB-dfs-group-1] priority 120
[SwitchB-dfs-group-1] quit3，配置SwitchC
[SwitchC] interface meth 0/0/0
[SwitchC]-MEth0/0/0] ip address 10.1.1.3 24 //带外管理接口ip用作m-lag双住检测源
[SwitchC] dfs-group 1
[SwitchC-dfs-group-1] dual-active detection source-ip 10.1.1.3 peer 10.1.1.4
[SwitchC-dfs-group-1] priority 150
[SwitchC-dfs-group-1] quit4，配置SwitchD
[SwitchD] interface meth 0/0/0
[SwitchD]-MEth0/0/0] ip address 10.1.1.4 24 //带外管理接口ip用作m-lag双住检测源
[SwitchD] dfs-group 1
[SwitchD-dfs-group-1] dual-active detection source-ip 10.1.1.4 peer 10.1.1.3
[SwitchD-dfs-group-1] priority 150
[SwitchD-dfs-group-1] quit三、配置Peer-Link
1，配置SwitchA
[SwitchA] interface Eth-Trunk 0
[SwitchA-Eth-Trunk0] mode lacp-static
[SwitchA-Eth-Trunk0] trunkport xge 0/0/47 to 0/0/48
[SwitchA-Eth-Trunk0] peer-link 1
[SwitchA-Eth-Trunk0] quit2，配置SwitchB
[SwitchB] interface Eth-Trunk 0
[SwitchB-Eth-Trunk0] mode lacp-static
[SwitchB-Eth-Trunk0] trunkport xge 0/0/47 to 0/0/48
[SwitchB-Eth-Trunk0] peer-link 1
[SwitchB-Eth-Trunk0] quit3，配置SwitchC
[SwitchC] interface Eth-Trunk 0
[SwitchC-Eth-Trunk0] mode lacp-static
[SwitchC-Eth-Trunk0] trunkport xge 0/0/47 to 0/0/48
[SwitchC-Eth-Trunk0] peer-link 1
[SwitchC-Eth-Trunk0] quit4，配置SwitchD
[SwitchD] interface Eth-Trunk 0
[SwitchD-Eth-Trunk0] mode lacp-static
[SwitchD-Eth-Trunk0] trunkport xge 0/0/47 to 0/0/48
[SwitchD-Eth-Trunk0] peer-link 1
[SwitchD-Eth-Trunk0] quit
四、配置业务口
1，配置SwitchA
[SwitchA] interface Eth-Trunk 1
[SwitchA-Eth-Trunk1] mode lacp-static
[SwitchA-Eth-Trunk1] port link-type trunk
[SwitchA-Eth-Trunk1] port trunk allow-pass vlan all
[SwitchA-Eth-Trunk1] dfs-group 1 m-lag 1
[SwitchA-Eth-Trunk1] trunkport xge 0/0/1 to 0/0/2 //添加与汇聚交换机C、D的互联物理接口
[SwitchA] interface Eth-Trunk 2
[SwitchA-Eth-Trunk2] mode lacp-static
[SwitchA-Eth-Trunk2] port link-type trunk
[SwitchA-Eth-Trunk2] port trunk allow-pass vlan all
[SwitchA-Eth-Trunk2] dfs-group 1 m-lag 2
[SwitchA-Eth-Trunk2] trunkport xge 0/0/3 //添加与Server互联的物理接口2，配置SwitchB
[SwitchB] interface Eth-Trunk 1
[SwitchB-Eth-Trunk1] mode lacp-static
[SwitchB-Eth-Trunk1] port link-type trunk
[SwitchB-Eth-Trunk1] port trunk allow-pass vlan all
[SwitchB-Eth-Trunk1] dfs-group 1 m-lag 2
[SwitchB-Eth-Trunk1] trunkport xge 0/0/1 to 0/0/2 //添加与汇聚交换机C、D的互联物理接口
[SwitchB] interface Eth-Trunk 2
[SwitchB-Eth-Trunk2] mode lacp-static
[SwitchB-Eth-Trunk2] port link-type trunk
[SwitchB-Eth-Trunk2] port trunk allow-pass vlan all
[SwitchB-Eth-Trunk2] dfs-group 1 m-lag 2
[SwitchB-Eth-Trunk2] trunkport xge 0/0/3 //添加与Server互联的物理接口3，配置SwitchC
[SwitchC] interface Eth-Trunk 1
[SwitchC-Eth-Trunk1] mode lacp-static
[SwitchC-Eth-Trunk1] port link-type trunk
[SwitchC-Eth-Trunk1] port trunk allow-pass vlan all
[SwitchC-Eth-Trunk1] dfs-group 1 m-lag 1
[SwitchC-Eth-Trunk1] trunkport xge 0/0/1 to 0/0/2 //添加与接入交换机A、B的互联物理接口4，配置SwitchD
[SwitchD] interface Eth-Trunk 1
[SwitchD-Eth-Trunk1] mode lacp-static
[SwitchD-Eth-Trunk1] port link-type trunk
[SwitchD-Eth-Trunk1] port trunk allow-pass vlan all
[SwitchD-Eth-Trunk1] dfs-group 1 m-lag 1
[SwitchD-Eth-Trunk1] trunkport xge 0/0/1 to 0/0/2 //添加与接入交换机A、B的互联物理接口
五、验证DFS Group的M-LAG信息
验证M-LAG配置是否正确。可以通过显示命令来检查DFS Group、M-LAG状态信息。
1，接入交换机SwitchA上DFS Group、M-LAG状态检查
[SwitchA] display dfs-group 1 m-lag
* : Local node
Heart beat state : OK
Node 1 *
Dfs-Group ID : 1
Priority : 150
Address : ip address 10.1.1.1
State : Master
Causation : -
System ID : 0025-9e95-7c31
SysName : SwitchC
Version : V100R006C00
Device Type : CE6850EI
Node 2
Dfs-Group ID : 1
Priority : 120
Address : ip address 10.1.1.2
State : Backup
Causation : -
System ID : 0025-9e95-7c11
SysName : SwitchD
Version : V100R006C00
Device Type : CE6850EI
[SwitchA] display dfs-group 1 node 1 m-lag brief
* - Local node
M-Lag ID Interface Port State Status
1 Eth-Trunk 1 Up active(*)-active
2 Eth-Trunk 2 Up active(*)-active
2，汇聚交换机SwitchC上DFS Group、M-LAG状态检查
[SwitchC] display dfs-group 1 m-lag
* : Local node
Heart beat state : OK
Node 1 *
Dfs-Group ID : 1
Priority : 150
Address : ip address 10.1.1.3
State : Master
Causation : -
System ID : 0025-9e95-7c41
SysName : SwitchC
Version : V100R006C00
Device Type : CE6850EI
Node 2
Dfs-Group ID : 1
Priority : 120
Address : ip address 10.1.1.4
State : Backup
Causation : -
System ID : 0025-9e95-7c21
SysName : SwitchD
Version : V100R006C00
Device Type : CE6850EI
[SwitchC] display dfs-group 1 node 1 m-lag brief
* - Local node
M-Lag ID Interface Port State Status
1 Eth-Trunk 1 Up active(*)-active
通过以上显示信息可以看到，“Heart beat state”的状态是“OK”，表明心跳状态正常；SwitchA和SwitchC作为Node 1，优先级为150，“State”的状态是“Master”；SwitchB和SwitchD作为Node 2，优先级为120，“State”的状态是“Backup”。同时“Causation”的状态是“-”，Node 1的“Port State”状态为“Up”，Node 2的“Port State”状态为“Up”，且Node 1和Node 2的M-LAG状态均为“active”，表明M-LAG的配置正确。
通过以上配置步骤，就可以在华为CE交换机上成功配置M-LAG，提高网络的可靠性和稳定性。