Creating Link Aggregation Groups (NG WDM NEs)Deleting Link Aggregation Groups (NG WDM NEs)

The link aggregation group aggregates multiple physical links to form a logical link that is at a higher rate so that the bandwidths and availability of the links increase.

Navigation Path

In the NE Explorer, select a board and choose Configuration > Ethernet Interface Management > Ethernet Link Aggregation Management from the Function Tree. Click the Link Aggregation Group Management tab.

Guideline

As shown in Figure 1, link aggregation provides the following functions:

Increased bandwidth

The LAG provides the telecommunications operators with a cost-effective method of increasing the link bandwidth. The telecom operators obtain data links with higher bandwidths by combining multiple physical links into one logical link without upgrading the existing equipment. The bandwidth of the logical link is equal to the sum of the bandwidths of the physical links. The aggregation module distributes the traffic to different members by using the load sharing algorithm, thus realizing the load sharing function at the link level.
Increased availability

The links in a LAG provide backup to each other dynamically. When a link fails, another link in the LAG quickly replaces the failed link. The process in which link aggregation starts the backup link relates only to the links in the same LAG and does not relate to the links that are not in the LAG.

Figure 1 Link aggregation group

You can add or delete the ports in an LAG dynamic:

Select an LAG, click Modify, and the Modify Link Aggregation Group dialog box is displayed. In the Available Standby Ports pane, select the port that you want to add and click to add the port to the Selected Standby Ports pane. Click OK.
Select an LAG, click Modify, and the Modify Link Aggregation Group dialog box is displayed. In the Selected Standby Ports pane, select the port that you want to delete and click to delete the port from the Available Standby Ports pane. Click OK.

Caution

The ports (OTU port and Ethernet port) with different rates and different attributes on the front panel cannot be bound to the same LAG group. For example Ethernet PORT and VCTRUNK cannot belong to the same link aggregation group (LAG).
The main port number cannot appear in the branch port number list.
All ports in an LAG must be on the same processing board or interface board.
You cannot modify the physical attributes of a main port or a branch port, but you can query them. You can set and query the logical attributes of a main port or a branch port. The settings for only the main port are effective for the LAG.
Link aggregation does not affect RMON or alarms.
When you create a link aggregation group, all ports of this group must not be within any other group and the selected branch port must not be configured with any service.
When you create a static aggregation group of two NEs, services are interrupted. The interruption duration depends on the time interval of creating the static aggregation group on the two NEs.
Creating or deleting operation may interrupt services in a LAG group.
In the point-to-multipoint service, the multipoint ports cannot be coupled with the LAG, that is, the multipoint ports cannot join a LAG group.

Parameters

Field	Value	Description
LAG No.	For example: 1	Displays the LAG number.
LAG Name	A maximum of 31 characters For example: Group1	Displays the LAG name.
LAG Type	Manual, Static	Manual allows you to manually create an LAG with no LACP protocol. The LAG has fixed group members. This mode facilitates management but is less proper or effective in controlling link aggregation. Static allows you to manually create an LAG with the LACP protocol. You can verify the working status (selected or standby) of ports in the LAG. If the value is selected, the port can forward services. If standby, the port cannot forward services. This mode facilitates management and use, and is more proper and effective in controlling link aggregation.
Load Sharing	Sharing, Non-Sharing	Indicates the loading sharing type of the link group.
Revertive Mode	Non-Revertive, Revertive	Displays the revertive mode of the LAG.
Master Port	For example: PORT3	The main port in an LAG. Defines a main port in an LAG. The difference between the main port and a normal port is that the main port represents a logical port if several independent physical ports form a logical port after they are aggregated.
Standby Port	0 to 7	The Standby Port (Link Aggregation) parameter specifies that a link aggregation group is manually created rather than being automatically created by the system. A link aggregation group contains main port and standby ports. The standby ports in a link aggregation group are fixed. Unless they are manually modified, the system does not automatically add them to or delete them from the link aggregation group.
Status	Unknown, In Service, Out of Service Default: Unknown	The Status (Link Aggregation) parameter specifies the state, which is derived from logical computation, of each member ports in a link aggregation group. If you do not query an LAG, the port status is Unknown. If the port is the actually working port and services are forwarded at the port, the port status is In Service. If the port is the standby port and no service is forwarded at the port, the port status is Out of Service.
Available Standby Ports	For example, PORT4	Displays the port that can be used as a standby port.
Selected Standby Ports	For example, PORT4	Displays the port that is selected as a standby port.
Local/Peer NE ID	For example: 32768, 0-0-0-0-0-0	Displays the local or peer NE ID.
Selected Port Count	For example: 1	Displays the selected port count.
Standby Port Count	For example: 0	Displays the standby port count.
Local/Peer Port	For example: PORT3	Displays the local port or the peer port.
Local/Peer Port Working Status	For example: Out of Service.	Displays the local port or the peer port working status.
Local/Peer Port Status	Selected, Unselected, Standby	Displays the local port or the peer port status. Selected indicates that the port can carry services. Unselected indicates that the port does not meet the requirements for aggregation and thus cannot carry services. Standby indicates that the port meets the requirements for aggregation but cannot carry services because the number of ports that can carry services exceeds the limit of the board.
Local/Peer Port Priority	0-655536	Displays the local port or the peer port priority.
Local/Peer Operation KEY	For example: 2	Displays the local operation KEY or the peer operation KEY. The operation KEY is determined by the attributes including aggregation group ID, duplex mode, and rate. If the three attributes of a port are the same as those of another port, the operation KEYs of the ports are also the same.
Local/Peer LACP Protocol Flay	For example: 2	Displays the local LACP protocol flag.
Received LACPDU Count	For example: 50	Displays the received LACPDU count.
Received Error LACPDU Count	For example: 10	Displays the received error LACPDU count.
Transmitted LACPDU Count	For example: 20	Displays the transmitted LACPDU count