OLT Interfaces

When an OLT or component is selected in the Common Tree, the Ports view displays the applicable tabs and information for that component.

• Procedures for Gigabit Ethernet (GbE) ports apply to all Tellabs 1100 Series Ethernet OLTs.
• Procedures for Gigabit Passive Optical Network (GPON) ports apply to Tellabs 1134/OLT6, and Tellabs 1150

When working in the Ports view, the retrieval of information can be stopped (aborted) and control of the client regained. This is helpful if the client becomes unresponsive (for example, due to a communication error or similar condition). The Ports view displays a message while information is being retrieved. For more information about this function, refer to Stopping the Lines View Retrieval Process.

Understanding OLT Interfaces

For each Tellabs 1100 Series shelf (11xx OLT) up to 12 available interfaces can be configured in Panorama for use by the OLT. To use an interface, at least one ESU port must be assigned. A port can belong to only one interface. Assigning multiple ports to an interface makes it a Link Aggregation Group (LAG) interface. The number of available ports depends on the number of ESUs, 1 or 2, and model. (For detailed information about ESU models, refer to the Tellabs 1100 Series Optical LAN Plug In Cards User Guide.)

As shown in the following diagram (Fig. 133), interfaces for any of the following can be used, in any combination:

• Uplink interfaces
• LAG uplink interfaces
• 11xx Transport (downlink) interfaces
• LAG 11xx Transport interfaces
• Customer Edge interfaces
• Customer Network interfaces
   

  Figure 1: Interface Types
  
  
   

For more information, refer to: Managing Uplink Interfaces.

Understanding Link Aggregation Group Options

A Link Aggregation Group (LAG) is helpful in any, or all, of the following circumstances:

• Traffic requirements exceed the capabilities of a single port.
• Introduce redundancy
• Move traffic more efficiently

A LAG is like combining three two-lane highways to create a six-lane highway - not only does it carry heavier traffic, but if two lanes close, all the traffic can keep moving using the lanes that are still open. As shown in Figure 1, the Tellabs 1100 systems offer several LAG options:

• LAG uplink interfaces, which aggregate single OLTs ports to uplink to the network
• LAG transport interfaces, which aggregate ports on each of two OLTs to transport traffic between them.
• LAG ring interfaces, each of which groups at least three ports on a single OLT. These LAG ring interfaces combine to form a ring. A ring aggregates up to 16 OLTs to move traffic to a single uplink interface, and from there to the network.

This section contains the following procedures related to Uplink interfaces:

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