L-ET4148-50C-DB LSI, L-ET4148-50C-DB Datasheet - Page 25

• Manufacturer Part Number: L-ET4148-50C-DB
• Manufacturer: LSI

Specifications of L-ET4148-50C-DB

• Lead Free Status / RoHS Status: Supplier Unconfirmed

Preliminary Data Sheet
April 2006
Agere Systems Inc.
Functional Description
Bridging
The ET4148-50’s bridging process utilizes Layer 2 information from the packet as a primary means for determining
the destination or destinations of a receive packet.
APPLY BLOCKING MASK
B
Single-Chip 48 x 1 Gbit/s + 2 x 10 Gbits/s Layer 2+ Ethernet Switch
(continued)
FOR LOOK-UP, GET EXPECTED RECEIVE PORT
UPDATE SOURCE ADDRESS TIME STAMP
FOR LOOK-UP, GET DESTINATION MAP
SUBMIT MAC DESTINATION ADDRESS
Figure 8. Bridging Process (Part 1)
SUBMIT MAC SOURCE ADDRESS
N
Agere Systems - Proprietary
Y
EXPECTED RECEIVE
IGMP && SNOOPING
RECEIVE PORT ==
FORWARDING
PROTOCOL ==
IN BLOCKING
IN LEARNING
PORT/VLAN IN
PORT/VLAN
PORT/VLAN
UNKNOWN?
ENABLED?
ADDRESS
SOURCE
START
STATE?
STATE?
STATE?
PORT?
A
Y
N
N
N
N
Y
Y
Y
Y
N
ADD IGMP SNOOPING QUEUE
APPLY LEARNING MASK
ADD LEARNING QUEUE
ET4148-50
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