L-ET4148-50C-DB LSI, L-ET4148-50C-DB Datasheet - Page 23

• 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
Access Control
The access control process examines certain fields within each receive packet and determines whether or not the
packets should be granted access to the ET4148-50 and its attached networks.
DELIVER PACKET
TO BRIDGING
DENY PACKET
DONE
DONE
TCP/UDP DESTINATION PORT LOOK-UP
IP DESTINATION ADDRESS LOOK-UP
TCP/UDP SOURCE PORT LOOK-UP
IP SOURCE ADDRESS LOOK-UP
SELECT LEFT-MOST ACE FROM
RETRIEVE ACE MAP BASED ON
RETRIEVE ACE MAP BASED ON
RETRIEVE ACE MAP BASED ON
RETRIEVE ACE MAP BASED ON
RETRIEVE ACE MAP BASED ON
USE BITWISE AND TO REDUCE
ACE MAPS TO SINGLE BIT MAP
LAYER 4 PROTOCOL LOOK-UP
Y
Y
AND-REDUCED BIT MAP
TO SELECT ACL
NO MATCHING
VLAN-BASED
USE VLAN ID
ACL EMPTY?
START
ACLS?
ACES?
Single-Chip 48 x 1 Gbit/s + 2 x 10 Gbits/s Layer 2+ Ethernet Switch
(continued)
Y
N
N
Figure 7. Access Control Process
Agere Systems - Proprietary
N
USE RECEIVE PORT
TO SELECT ACL
CORRESPONDING
DELIVER PACKET
ACL ACTION
TO BRIDGING
RETRIEVE
PRIORITY?
PERMIT?
UPDATE
LOG?
DONE
Y
N
N
Y
Y
N
OVERWRITE PACKET’S
TO DESTINATION
PRIORITY VALUE
ADD LOGGING
QUEUE
LOG DENIED
DENY PACKET
PACKETS?
DONE
N
TO DESTINATION
ADD LOGGING
QUEUE
Y
ET4148-50
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