Priority Queue - Cisco WS-C4507R Troubleshooting Manual

RST-3508
9805_05_2004_c2
RST-3508
9805_05_2004_c2
© 2004 Cisco Systems, Inc. All rights reserved. Printed in USA.
Presentation_ID.scr
Scheduling: Shaping
Max rate (10K to 1 Gbps)
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Shaped queue like a "virtual wire"
Packets clock out exactly at shaped rate
Hold packets in queue when rate exceeded
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Example use:
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Shape a bursty application to 1 Mbps to smooth it
Supported on all ports, typically used with strict
•

priority queue

TX Port Q
© 2004 Cisco Systems, Inc. All rights reserved.
Scheduling: Sharing
Minimum rate (32 Kbps to 1 Gbps)
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Rate is guaranteed minimum
Scheduling algorithm:
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If below share rate, queue is high priority
High priority queues serviced first
Sharing only on non-blocking gigabit ports in Supervisor IV
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and II-Plus
Supported on ALL ports on Supervisor Engine V
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Non-Blocking
Port
TX Port Q
© 2004 Cisco Systems, Inc. All rights reserved.
Shaper (Specifies Max BW)
Shaper (Specifies Max BW)
Sharer (Specifies Min Guaranteed BW)
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