Physical Link Aggregation

Physical link aggregation (PLA/EPLA) allows all Ethernet transmission paths in several Integrated IP microwave links connected to the same equipment to be aggregated as a PLA. For MAC users, a PLA works as a single link.

Navigation Path

In the NE Explorer, select an NE and choose Configuration > Physical Link Aggregation.

Shortcut Menu Description

Menu Item	Description
Browse Current Alarms	Displays the browse current alarms window and you can query the current alarms.
Browse Historical Alarms	Displays the browse historical alarms window and you can query the browse historical alarms.
Alarm Suppression	Displays the alarm suppression dialog box. After the alarm suppression is set successfully for an alarm, NEs do not report this alarm any more. After the alarm suppression is set successfully for an alarm, the alarm that has been reported is cleared.
Browse Performance	Displays the performance management window where you can browse the current and historical performance data.
Performance Statistics Management	Displays the performance statistics management dialog box where you can create or view performance monitoring instances to browse the current or historical performance data.

Parameters

**Table 1** Parameters for RTN910/950/980/380 and RTN905(Subrack Type:I or II)
Field	Value	Description
PLA ID	For example: 1	Displays physical PLA ID.
PLA Type	EPLA,PLA	Sets physical PLA type. EPLA is enhanced PLA. PLA can aggregate only two links. EPLA can aggregate up to four links. Common PLA is performed on IF ports and therefore requires paired slots. EPLA is performed by data switching chips and therefore raises no requirement for slots.
Main Board	For example: slot number-board name	Sets and sets main board.
Main Port	For example: port number(port name)	A main port represents its PLA group. A main port represents a PLA group to participate in service configuration. A PLA group has only one main port. The main port of a PLA group does not change since it is configured. After a PLA group is deleted, its services are still carried by the main port.
Hardware Status of Main Port	For example: Abnormal	Displays the hardware status of main port.
Link Status of Main Port	For example: Abnormal	Displays the link status of main port.
Work Status of Main Port	For example: Main Port	Displays the work status of main port.
Minimum Active Links	For example: 1	Sets the minimum active links. An PLA group can be activated only when the number of active links in the group is equal to the specified value. To trigger ERPS switching upon a failure in a PLA member link when PLA and ERPS work together, Minimum Active Links must be set to 2.
Slave Board	For example: Abnormal	Sets slave board.
Slave Port	For example: Slave Port	In a PLA group, the ports other than the main port are slave ports. A slave port cannot participate in service configuration. A slave port of a PLA group does not change since it is configured. NOTE: A PLA group always includes one slave port. An EPLA group includes a maximum of four slave ports. PLA cannot interwork with EPLA.
Hardware Status of Slave Port	For example: Abnormal	Displays the hardware status of slave port.
Link Status of Slave Port	For example: Abnormal	Displays the link status of slave port.
Work Status of Slave Port	For example: Slave Port	Displays the work status of slave port.

**Table 2** Parameters for RTN310 and RTN905(Subrack Type:III)
Field	Value	Description
Cascading Status	Cascaded, Not cascaded	Displays status of physical PLA.
PLA ID	1	Displays physical PLA ID. You can create only one PLA on an NE. The default value is 1.
PLA Type	PLA, EPLA	Sets physical PLA type. EPLA is enhanced PLA. PLA can aggregate only two links. EPLA can aggregate up to four links. Common PLA is performed on IF ports and therefore requires paired slots. EPLA is performed by data switching chips and therefore raises no requirement for slots.
IF Port	Slot Number-Board Name-Port Number	Displays the IF port.
Service Port	Slot Number-Board Name-Port Number	Displays the service port.
Cascade Port	Slot Number-Board Name-Port Number	Displays the cascade port.
NE Role	Master NE, Slave NE	Displays the NE role.
Protection Type	No NE-Level protection, NE-level LAG protection	Displays the protection type.
Minimum Active Links	1, 2	Sets the minimum active links. An PLA group can be activated only when the number of active links in the group is equal to the specified value. To trigger ERPS switching upon a failure in a PLA member link when PLA and ERPS work together, Minimum Active Links must be set to 2.
Active NE	For example: NE(9-125)	Displays the active NE.
Main Board	For example: slot number-board name	Sets and sets main board.
Port	Slot Number-Board Name-Port Number	Displays port of the active NE.
NE	Local NE, Adjacent NE	Displays the NE.
Hardware Status	For example: Normal	Displays hardware status of the active NE.
Link Status	For example: Normal	Displays link status of the active NE.
Running Status	For example: Normal	Displays running status of active NE.
Standby NE	For example: NE(9-126)	Displays the standby NE.
Port	Slot Number-Board Name-Port Number	Displays port of the standby NE.
Hardware Status	For example: Normal	Displays hardware status of the standby NE.
Link Status	For example: Normal	Displays link status of the standby NE.
Running Status	For example: Normal	Displays running status of standby NE.