Link aggregation, Coronado tables, Layer 2 tables – Alcatel Carrier Internetworking Solutions 6648 User Manual
Page 335: Layer 3 tables
Link Aggregation
OmniSwitch Troubleshooting Guide
September 2005
page -11
Link Aggregation
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 Tables
Coronado maintains two different kinds of tables:
•
Layer 2 Tables
•
Layer 3 Tables
Layer 2 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
Layer 3 Tables
•
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.