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[Configuration and Deployment Instructions] Configure Consistent Global Configurations Between Two E-Trunk Devices

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Configure Consistent Global Configurations Between Two E-Trunk Devices

In a scenario where Eth-Trunk interfaces in static LACP mode are added to an E-Trunk on two devices, the global configurations of lacp e-trunk system-id system-id and lacp e-trunk priority priority are inconsistent between the two devices, causing the Eth-Trunk interface status to be inconsistent with the expected status.

Scenario

On the network shown in Figure 1-6, Eth-Trunk 1 is configured to work in static LACP mode and added to an E-Trunk.

Figure 1-6  Incorrect Eth-Trunk status 
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For details about how to configure an Eth-Trunk interface to work in static LACP mode, see Eth-Trunk Interface Features That the NE40E&NE80E Supports.


Configuration Requirements

After Eth-Trunk interfaces are configured to work in static LACP mode and the Eth-Trunk interfaces are added to an E-Trunk deployed on PE1 and PE2, the lacp e-trunk system-id system-id and lacp e-trunk priority priority commands must be run on PE1 and PE2 in their system views, with system IDs being the same and priorities being the same.

Misconfiguration Risks

Risk description:

If the E-Trunk system IDs and priorities of PE1 and PE2 are not the same, the Eth-Trunk status may be inconsistent with the expected master/backup status.

Identification method:

Run the display eth-trunk eth-trunk-id command in any view of PE1 and PE2 to check System ID and System Priority.

The following command output shows that PE1 and PE2 have the same system ID but different priorities.

# On PE1, Eth-Trunk 1 is added to E-Trunk 1, System Priority is 100, and System ID is 0001-0001-0001.

<HUAWEI> system-view
[HUAWEI] interface eth-trunk 1
[HUAWEI-Eth-Trunk1] display this
#
interface Eth-Trunk1
 mode lacp-static
 e-trunk 1  
#
[HUAWEI] display eth-trunk 1
Eth-Trunk1's state information is:
Local:
LAG ID: 1                   WorkingMode: STATIC                               
Preempt Delay: Disabled     Hash arithmetic: According to flow                
System Priority: 100        System ID: 0001-0001-0001                         
Least Active-linknumber: 1  Max Active-linknumber: 16                         
Operate status: down        Number Of Up Port In Trunk: 0                     
--------------------------------------------------------------------------------
ActorPortName          Status   PortType PortPri PortNo PortKey PortState Weight
Partner:
--------------------------------------------------------------------------------
ActorPortName          SysPri   SystemID        PortPri PortNo PortKey PortState

# On PE2, Eth-Trunk 1 is added to E-Trunk 1, System Priority is 101, and System ID is 0001-0001-0001.

<HUAWEI> system-view
[HUAWEI] interface eth-trunk 1
[HUAWEI-Eth-Trunk1] display this 
#
interface Eth-Trunk1
 mode lacp-static
 e-trunk 1  
#
[HUAWEI] display eth-trunk 1
Eth-Trunk1's state information is:
Local:
LAG ID: 1                   WorkingMode: STATIC                               
Preempt Delay: Disabled     Hash arithmetic: According to flow                
System Priority: 101        System ID: 0001-0001-0001                         
Least Active-linknumber: 1  Max Active-linknumber: 16                         
Operate status: up        Number Of Up Port In Trunk: 0                     
--------------------------------------------------------------------------------
ActorPortName          Status   PortType PortPri PortNo PortKey PortState Weight
Partner:
--------------------------------------------------------------------------------
ActorPortName          SysPri   SystemID        PortPri PortNo PortKey PortState

Recovery measures:

Run the lacp e-trunk system-id system-id and lacp e-trunk priority priority commands on PE1 and PE2 to modify their system IDs and priorities to be the same.


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