Alcatel Carrier Internetworking Solutions 8800 User Manual

Link Aggregation

OmniSwitch Troubleshooting Guide

page -11

Link Aggregation feature allows software to aggregate a set of ports (not necessarily contiguous or on the 
same Coronado) into a group. Each port is referred to as a channel that can carry some bandwidth. This 
feature requires that all the queues associated with all the ports in the group to be contiguous. Events 
resulting in Link Aggregation and Q driver interaction may be for the creation and deletion of link aggre-
gation group.

Coronado maintains two different kinds of tables:

• Layer 2 Tables

• Layer 3 Tables

• 64,000 pseudo CAM entries are split in 2 tables:

• L2-Source Address (L2-SA) Table containing

• VLAN membership (GID)

• Value (MAC address)

• 2-L2-Destination Address (L2-DA) Table containing

• VLAN Membership (GID)

• Value (MAC address)

• Destination Queues to use (QID/ReQID)

• Priority Description Index (PDI) containing Internal Priority

• Request for additional L3/L4 lookup and use of resultant QID

• 64,000 pseudo CAM entries. A single table is maintained for all the Source and Destination L3 

addresses. Entries are based on selected lookup mode.

• Now, the primary functions and the architecture of Source Learning, Hardware Routing Engine (HRE) 

and QOS functional blocks will be discussed.