© 2004 Cisco Systems, Inc. All rights reserved. Printed in USA.
Presentation_ID.scr
959595
© 2004 Cisco Systems, Inc. All rights reserved.
RST-3508
9805_05_2004_c2
Catalyst 4500 QoS Capabilities
• Layer 2 only
• System-wide QoS
• Dual queues per port
• Layer 2, 3, or 4 QoS
• Per-port QoS
• Four Tx queues per port
• Strict priority queue
• Dynamic queue memory
allocation
• Packet classification and
marking
• Policing/bursting
• Shaping/sharing
Supervisor II (CAT OS)
Cisco IOS Supervisors
Queue 1
Queue 2
Queue 1
Queue 2
Queue 3
Queue 4
969696
© 2004 Cisco Systems, Inc. All rights reserved.
RST-3508
9805_05_2004_c2
QoS on Supervisor I/II (Catalyst OS)
• System-wide QoS configuration
• Global configuration applies to all ports on
the switch
• Disabling QoS configuration disables QoS on
all ports
• By default a port state is untrusted
• Ports can be set to have a default CoS on a
system-wide basis
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