© 2004 Cisco Systems, Inc. All rights reserved. Printed in USA.
Presentation_ID.scr
414141
© 2004 Cisco Systems, Inc. All rights reserved.
RST-3508
9805_05_2004_c2
Blocking and Non-Blocking GigE Ports
• A port that does not oversubscribe
access to the switching fabric is a non-
blocking port
• A port that oversubscribes access to the
switching fabric is a blocking port
424242
© 2004 Cisco Systems, Inc. All rights reserved.
RST-3508
9805_05_2004_c2
Cisco Catalyst 4000/4500 Linecards
• Six full-duplex GbE connections to switch fabric
• Transparent
No local forwarding—all packets go to supervisor
• GbE connections from switch fabric straight to
front-panel port or connect to stubs
Six Full-Duplex Gbps
Connections to
Supervisor Switch
Fabric
Supervisor Switch Fabric
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