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Cisco Catalyst 3750 Software Configuration Guide

Cisco Catalyst 3750
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26-17
Catalyst 3750 Metro Switch Software Configuration Guide
78-15870-01
Chapter 26 Configuring QoS
Understanding QoS
Queueing and Scheduling of Egress Queue-Sets
Figure 26-8 shows the egress queue-set queueing and scheduling flowchart.
Figure 26-8 Egress Queue-Set Queueing and Scheduling Flowchart
98884
Receive packet from
the internal ring.
Read QoS label
(DSCP or CoS value).
Determine egress queue
number and threshold
based on the label.
Are thresholds
being exceeded?
Send the packet out the
standard port, to the
input of the hierarchical
egress queueing and
scheduling, or both.
Queue the packet. Service
the queue according to
the SRR weights.
Drop packet.
Start
Done
Ye s
No
Rewrite DSCP,
CoS, or both values,
as appropriate.

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Cisco Catalyst 3750 Specifications

General IconGeneral
Device TypeSwitch
Switching Capacity32 Gbps
Forwarding Rate38.7 Mpps
Stacking Bandwidth32 Gbps
RAM128 MB
Jumbo Frame SupportYes
Switch TypeManaged
ModelCatalyst 3750 Series
Uplink InterfacesSFP
Form FactorRack-mountable
MAC Address Table Size12, 000 entries
Routing ProtocolRIP, OSPF, EIGRP
Remote Management ProtocolSNMP, Telnet, HTTP
FeaturesLayer 3 switching, Layer 2 switching, auto-negotiation, BOOTP support, ARP support, VLAN support, auto-uplink (auto MDI/MDI-X), IGMP snooping, traffic shaping, MAC address filtering, Quality of Service (QoS), Jumbo Frames support, MLD snooping, Dynamic ARP Inspection (DAI), Cisco EnergyWise technology
Power over Ethernet (PoE)PoE
Operating Temperature-5 - 45 °C
Operating Humidity10% to 85% non-condensing

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