H3C交换机新版M-lag配置

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场景说明：传统组网，交换机1、交换机2组成M-lag系统，与交换机3形成跨设备链路聚合，并且作为网关、根桥。这种技术H3C之前叫做DRNI，目前新版系统中已经改名为M-lag。

交换机1配置：

#
 sysname A-H1
#
ip vpn-instance Keepalive  //配置Keepalive使用的VRF，非必要，建议将Keepalive独立出来，除非复用三层逃生，逃生可以考虑子接口
#
vlan 1
#
 stp instance 0 root primary
 stp global enable
#
interface Bridge-Aggregation11  //配置与SW3的跨设备聚合口
 link-aggregation mode dynamic
 port m-lag group 11
#
interface Bridge-Aggregation1024 //配置Peer-link接口
 port link-type trunk
 port trunk permit vlan all
 link-aggregation mode dynamic
 port m-lag peer-link 1 //配置了该命令后，Peer-link接口会自动变为trunk然后允许所有vlan通过
#
interface Route-Aggregation1024 //配置Keepalive接口，可以是三层单接口，建议采用聚合口，增加冗余性
 ip binding vpn-instance Keepalive
 ip address 1.1.1.1 255.255.255.252
 link-aggregation mode dynamic
#
interface Vlan-interface1 //配置双活网关
 ip address 192.168.10.254 255.255.255.0
 mac-address 7e20-ab68-0100 //双活网关中，同一个网关MAC地址必须一致
 ipv6 address 240E::FFFF:FFFF/96
#
interface GigabitEthernet1/0/1
 port link-mode bridge
 combo enable fiber
 port link-aggregation group 11
#
interface FortyGigE1/0/53
 port link-mode bridge
 port link-type trunk
 port trunk permit vlan all
 port link-aggregation group 1024
#
interface FortyGigE1/0/54
 port link-mode bridge
 port link-type trunk
 port trunk permit vlan all
 port link-aggregation group 1024
#
interface Ten-GigabitEthernet1/0/51
 port link-mode route
 combo enable fiber
 port link-aggregation group 1024
#
interface Ten-GigabitEthernet1/0/52
 port link-mode route
 combo enable fiber
 port link-aggregation group 1024
#
 m-lag mad exclude interface Route-Aggregation1024 //配置M-LAG的Peer-link链路中断后，Keepalive链路为非阻断场景，如果不配置，则会造成二次故障场景产生，当故障设备恢复后会导致M-lag系统来回震荡。
 m-lag restore-delay 180 //当M-lag系统分裂后，重新恢复，备机会等待180s才会将业务接口UP，避免转发黑洞
 m-lag system-mac 7e20-ab68-0100 //配置M-lag系统的全局MAC，主要用于LACP的system-id和stp的桥ID
 m-lag system-number 1 //配置m-lag系统中的角色，主设备配置为1，备设备配置为2
 m-lag system-priority 4096 //配置m-lag中LACP的优先级
 m-lag standalone enable delay 600 //开启DR设备独立工作功能，仅Peer-link和Keeaplive同时故障时生效，故障后，设备会形成双主，但是与其他设备组成的M-LAG接口lacp会采用独立的system-id与对端进行lacp协商，最终只会有一台设备协商成功，防止了故障场景的转发问题。
 m-lag keepalive ip destination 1.1.1.2 source 1.1.1.1 vpn-instance Keepalive //配置keepalive链路并指定相关的vpn-instance
#
return

故障场景测试：关闭Peer-link链路模拟链路故障

结论：当Peer-link故障后，MAD功能触发，将M-LAG备系统的业务接口全部关闭防止双主场景出现。

故障场景测试：当Peer-link链路和Keepalive链路同时故障

结论：可以看到M-LAG独立工作模式生效，两台设备恢复了自身的system-id，导致交换机3仅能与其中一台设备进行聚合，流量会转发给M-LAG主设备，但是这种场景仅限于二层场景，如果M-LAG系统上联的设备是三层并且是负载场景，那么依旧会有流量转发到M-LAG备设备从而造成转发黑洞的产生。

故障场景：Keepalive链路故障

结论：当仅有Keepalive故障的场景时，不会影响系统转发，功能依旧正常，但是没有避免m-lag分裂后的故障处理了。


			


	



				
	
			



	
			

			《H3C交换机新版M-lag配置》有12个想法		


		
		
    
					
  1. 
			
    
				

				
    
					
    2台核心交换机m-lag配置后
    
每个核心交换机一个物理端口列入到 二层聚合口中
    
聚合口port m-lag group 1  设置这个 和下联接入的 聚合口是down呢？
    
				
    

				
    回复
    			
    
		
      
		
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      如果是动态链路聚合，需要考虑两端配置是否正确连线是否正确，对于下联交换机如果是M-LAG或堆叠也需要查看聚合结果是否正确。
      
如果是非LACP聚合，则需要查看本设备的M-LAG配置是否正确了，比如DRNI中的system-mac是否一致。
      
				
      

				
      回复
      			
      
		
      2. 

    

    2. 
		
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    M-LAG跨设备链路聚合
    
2根线M-LAG 到一台二层交换机二层聚合之后 只能1G速率吗？不是2G吗？
    
				
    

				
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    3. 
		
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    下面配置之后核心A设备到接入的聚合up了
    
但是另外一台核心B设备到接入的聚合还是down
    
之前确实  核心做了 动态聚合  接入没做动态引起的 上述回复确实帮到我解决了问题感谢。
    

    主交换机配置
    

    配置M-LAG：
    
[Core-A]m-lag system-mac 1-1-1
    
Changing the system MAC address might flap the peer link and cause M-LAG system setup failure. Continue? [Y/N]:y
    
[Core-A]m-lag system-number 1
    
Changing the system number might flap the peer link and cause M-LAG system setup failure. Continue? [Y/N]:y
    
[Core-A]m-lag system-priority 123
    
Changing the system priority might flap the peer link and cause M-LAG system setup failure. Continue? [Y/N]:y
    
[Core-A]m-lag restore-delay 180
    
[Core-A]m-lag keepalive ip destination 1.1.1.1 source 1.1.1.2
    

    配置M-LAG的Keeplive三层动态聚合口：
    
[Core-A]interface Route-Aggregation 1
    
[Core-A-Route-Aggregation1]description ##M-LAG(Keeplive)Ragg##
    
[Core-A-Route-Aggregation1]link-aggregation mode dynamic
    
[Core-A-Route-Aggregation1]ip address 1.1.1.2 255.255.255.252
    
[Core-A-Route-Aggregation1]quit
    
[Core-A]interface range GigabitEthernet 1/0/47 GigabitEthernet 1/0/48
    
[Core-A-if-range]port link-mode route
    
[Core-A-if-range]port link-aggregation group 1
    
[Core-A-if-range]quit
    
[Core-A]interface GigabitEthernet 1/0/47
    
[Core-A-GigabitEthernet1/0/47]description ##Link-Core-B(G1/0/47)##
    
[Core-A-GigabitEthernet1/0/47]quit
    
[Core-A]interface GigabitEthernet 1/0/48
    
[Core-A-GigabitEthernet1/0/48]description ##Link-Core-B(G1/0/48)##
    
[Core-A-GigabitEthernet1/0/48]quit
    
[Core-A]m-lag mad exclude interface Route-Aggregation 1
    

    配置M-LAG的peer-link二层动态聚合口：
    
[Core-A]interface Bridge-Aggregation 1
    
[Core-A-Bridge-Aggregation1]description ##Peer-Link##
    
[Core-A-Bridge-Aggregation1]link-aggregation mode dynamic
    
[Core-A-Bridge-Aggregation1]quit
    
[Core-A]interface range FortyGigE 1/0/53 FortyGigE 1/0/54
    
[Core-A-if-range]port link-aggregation group 1
    
[Core-A-if-range]quit
    
[Core-A]interface Bridge-Aggregation 1
    
[Core-A-Bridge-Aggregation1]port m-lag peer-link 1
    
[Core-A-Bridge-Aggregation1]undo port trunk permit vlan 1
    
[Core-A-Bridge-Aggregation1]port trunk permit vlan 2 to 4094
    
[Core-A-Bridge-Aggregation1]quit
    
[Core-A]interface FortyGigE 1/0/53
    
[Core-A-FortyGigE1/0/53]description ##Link-Core-B(FG1/0/53)##
    
[Core-A-FortyGigE1/0/53]quit
    
[Core-A]interface FortyGigE 1/0/54
    
[Core-A-FortyGigE1/0/54]description ##Link-Core-B(FG1/0/54)##
    
[Core-A-FortyGigE1/0/54]quit
    
[Core-A]save f
    

    从交换机配置
    

    配置M-LAG：
    
[Core-B]m-lag system-mac 1-1-1
    
Changing the system MAC address might flap the peer link and cause M-LAG system setup failure. Continue? [Y/N]:y
    
[Core-B]m-lag system-number 2
    
Changing the system number might flap the peer link and cause M-LAG system setup failure. Continue? [Y/N]:y
    
[Core-B]m-lag system-priority 123
    
Changing the system priority might flap the peer link and cause M-LAG system setup failure. Continue? [Y/N]:y
    
[Core-B]m-lag restore-delay 180
    
[Core-B]m-lag keepalive ip destination 1.1.1.2 source 1.1.1.1
    

    配置M-LAG的Keeplive三层动态聚合口：
    
[Core-B]interface Route-Aggregation 1
    
[Core-B-Route-Aggregation1]description ##M-LAG(Keeplive)Ragg##
    
[Core-B-Route-Aggregation1]link-aggregation mode dynamic
    
[Core-B-Route-Aggregation1]ip address 1.1.1.1 255.255.255.252
    
[Core-B-Route-Aggregation1]quit
    
[Core-B]interface range GigabitEthernet 1/0/47 GigabitEthernet 1/0/48
    
[Core-B-if-range]port link-mode route
    
[Core-B-if-range]port link-aggregation group 1
    
[Core-B-if-range]quit
    
[Core-B]interface GigabitEthernet 1/0/47
    
[Core-B-GigabitEthernet1/0/47]description ##Link-Core-A(G1/0/47)##
    
[Core-B-GigabitEthernet1/0/47]quit
    
[Core-B]interface GigabitEthernet 1/0/48
    
[Core-B-GigabitEthernet1/0/48]description ##Link-Core-A(G1/0/48)##
    
[Core-B-GigabitEthernet1/0/48]quit
    
[Core-B]m-lag mad exclude interface Route-Aggregation 1
    

    配置M-LAG的peer-link二层动态聚合口：
    
[Core-B]interface Bridge-Aggregation 1
    
[Core-B-Bridge-Aggregation1]description ##Peer-Link##
    
[Core-B-Bridge-Aggregation1]link-aggregation mode dynamic
    
[Core-B-Bridge-Aggregation1]quit
    
[Core-B]interface range FortyGigE 1/0/53 FortyGigE 1/0/54
    
[Core-B-if-range]port link-aggregation group 1
    
[Core-B-if-range]quit
    
[Core-B]interface Bridge-Aggregation 1
    
[Core-B-Bridge-Aggregation1]port m-lag peer-link 1
    
[Core-B-Bridge-Aggregation1]undo port trunk permit vlan 1
    
[Core-B-Bridge-Aggregation1]port trunk permit vlan 2 to 4094
    
[Core-B-Bridge-Aggregation1]quit
    
[Core-B]interface FortyGigE 1/0/53
    
[Core-B-FortyGigE1/0/53]description ##Link-Core-A(FG1/0/53)##
    
[Core-B-FortyGigE1/0/53]quit
    
[Core-B]interface FortyGigE 1/0/54
    
[Core-B-FortyGigE1/0/54]description ##Link-Core-A(FG1/0/54)##
    
[Core-B-FortyGigE1/0/54]quit
    
[Core-B]save f
    

    查看M-LAG命令：
    
[Core-A]display m-lag keepalive
    
[Core-A]display m-lag summary
    
[Core-A]display m-lag mad verbose
    

    主交换机配置下联交换机M-LAG口：
    
[Core-A]interface Bridge-Aggregation 2
    
[Core-A-Bridge-Aggregation2]description ##Link-L2-01(M-LAG)##
    
[Core-A-Bridge-Aggregation2]link-aggregation mode dynamic
    
[Core-A-Bridge-Aggregation2]quit
    
[Core-A]interface GigabitEthernet 1/0/1
    
[Core-A-GigabitEthernet1/0/1]description ##Link-L2-01(G1/0/47)##
    
[Core-A-GigabitEthernet1/0/1]port link-aggregation group 2
    
[Core-A-GigabitEthernet1/0/1]quit
    
[Core-A]interface Bridge-Aggregation 2
    
[Core-A-Bridge-Aggregation2]port link-type trunk
    
[Core-A-Bridge-Aggregation2]undo port trunk permit vlan 1
    
[Core-A-Bridge-Aggregation2]port trunk permit vlan 2 to 4094
    
[Core-A-Bridge-Aggregation2]port m-lag group 1
    
[Core-A-Bridge-Aggregation2]quit
    
[Core-A]save f
    

    从交换机配置下联交换机M-LAG口：
    
[Core-B]interface Bridge-Aggregation 2
    
[Core-B-Bridge-Aggregation2]description ##Link-L2-01(M-LAG)##
    
[Core-B-Bridge-Aggregation2]link-aggregation mode dynamic
    
[Core-B-Bridge-Aggregation2]quit
    
[Core-B]interface GigabitEthernet 1/0/1
    
[Core-B-GigabitEthernet1/0/1]description ##Link-L2-01(G1/0/48)##
    
[Core-B-GigabitEthernet1/0/1]port link-aggregation group 2
    
[Core-B-GigabitEthernet1/0/1]quit
    
[Core-B]interface Bridge-Aggregation 2
    
[Core-B-Bridge-Aggregation2]port link-type trunk
    
[Core-B-Bridge-Aggregation2]undo port trunk permit vlan 1
    
[Core-B-Bridge-Aggregation2]port trunk permit vlan 2 to 4094
    
[Core-B-Bridge-Aggregation2]port m-lag group 1
    
[Core-B-Bridge-Aggregation2]quit
    
[Core-B]save f
    

    接入交换机配置：
    
[L2-01]interface Bridge-Aggregation 1
    
[L2-01-Bridge-Aggregation1]description ##Link-Core(M-LAG)##
    
[L2-01-Bridge-Aggregation1]port link-type trunk
    
[L2-01-Bridge-Aggregation1]undo port trunk permit vlan 1
    
[L2-01-Bridge-Aggregation1]port trunk permit vlan 2 to 4094
    
[L2-01-Bridge-Aggregation1]link-aggregation mode dynamic
    
[L2-01-Bridge-Aggregation1]quit
    
[L2-01]interface GigabitEthernet 1/0/47
    
[L2-01-GigabitEthernet1/0/47]description ##Link-Core-A(G1/0/1)##
    
[L2-01-GigabitEthernet1/0/47]port link-aggregation group 1
    
[L2-01-GigabitEthernet1/0/47]quit
    
[L2-01]interface GigabitEthernet 1/0/48
    
[L2-01-GigabitEthernet1/0/48]description ##Link-Core-B(G1/0/1)##
    
[L2-01-GigabitEthernet1/0/48]port link-aggregation group 1
    
[L2-01-GigabitEthernet1/0/48]quit
    
				
    

				
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    4. 
		
  4. 
			
    
				

				
    
					
    找到问题了 是模拟器的bug
    

    华三HCL模拟器有BUG：
    
由于5.7版本中的6850交换机对应的comware分支存在取消，导致在配置m-lag的时候会有一致性检查不通过的情况
    
规避方法：
    
两台成员设备peer-link接口下配置jumboframe enable 1552
    
* 全部配置之后设置此项尽可
    
				
    

				
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    5. 
		
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    6. 
		
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    两台设备关机之启动一台设备情况下网络是不通的。
    
该设备处于None角色所有M-LAG接口处于M-LAG DOWN状态
    
需要在配置：
    
m-lag auto-recovery reload-delay 240
    
				
    

				
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    7. 
		
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    如果不配 m-lag role priority，设备是不是要按照mac地址来选择主备，或者下电主设备，让备成为主
    
				
    

				
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      设备角色优先级用于两台设备间进行主从协商，值越小优先级越高，优先级高的为主设备。
      

      如果优先级相同，那么比较两台设备的桥MAC地址，桥MAC地址较小的为主设备
      
设备手册里面这样说的
      
				
      

				
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