Cisco SF 302-08MP User Manual

Configuring Quality of Service
Configuring QoS
Cisco Small Business 300 Series Managed Switch Administration Guide 251
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Configuring QoS Queues
The switch supports four queues for each interface. Queue number four is the
highest priority queue. Queue number one is the lowest priority queue.
There are two ways of determining how traffic in queues is handled, Strict Priority
and Weighted Round Robin (WRR).
Strict Priority—Egress traffic from the highest-priority queue is transmitted first.
Traffic from the lower queues is processed only after the highest queue has been
transmitted, thus providing the highest level of priority of traffic to the highest
numbered queue.
Weighted Round Robin (WRR)—In WRR mode the number of packets sent from
the queue is proportional to the weight of the queue (the higher the weight the
more frames are sent). For example, if all four queues are WRR and the default
weights are used, queue1 receives 1/15 of the bandwidth (assuming all queues
are saturated and there is congestion), queue 2 receives 2/15, queue 3 receives 4/
15 and queue 4 receives 8 /15 of the bandwidth. The type of WRR algorithm used
in the device is not the standard Deficit WRR (DWRR), but rather Shaped Deficit
WRR (SDWRR).
The queuing modes can be selected in the
Queue Page. When the queuing mode
is by strict priority, the priority sets the order in which queues are serviced,
starting with queue_4 (the highest priority queue) and going to the next lower
queue when each queue is completed.
When the queuing mode is Weighted Round Robin, queues are serviced until their
quota has been used up and then another queue is serviced.
It is also possible to assign some of the lower queues to WRR, while keeping some
of the higher queues in strict priority. In this case traffic for the strict priority
queues is always sent before traffic from the WRR queues. Only after the strict
priority queues have been emptied is traffic from the WRR queues forwarded.
(The relative portion from each WRR queue depends on its weight).

Cisco SF 302-08MP Specifications

General

Product Type	Managed Switch
Number of Ports	8
PoE Ports	8
PoE Power Budget	62 W
PoE Budget	62 W
Layer	Layer 2
VLANs Supported	256
Power Supply	Internal
Ports	8 x 10/100 + 2 x Gigabit SFP
Management Type	Web-based GUI
MAC Address Table Size	8K
MAC Address Table	8K entries
Jumbo Frame Support	9216 bytes
Management	SNMP
Operating Temperature	0 - 40 °C
Storage Temperature	-20 - 70 °C
Humidity	10% to 90% (non-condensing)

Summary

Viewing Statistics

Managing System Logs

System Log Settings and Remote Logging

Configures system log settings, severity levels, aggregation, and remote SYSLOG servers.

Managing System Files

Firmware and Image Management

Covers upgrading/backing up firmware, language files, and selecting the active boot image.

Configuration and Log Management

Details downloading/backing up configurations or logs, displaying file properties, and copying files.

System Time

System Time Configuration

Explains setting system time manually or dynamically, time zones, and DST.

SNTP Configuration and Authentication

Describes synchronizing the clock with SNTP servers and configuring authentication.

Managing Device Diagnostics

Copper Port Testing

Explains integrated cable tests on copper cables using TDR and DSP-based methods.

Port and VLAN Mirroring

Configures sending copied network packets from ports or VLANs to a monitoring connection.

Configuring Discovery

LLDP Configuration and Management

Enables network managers to troubleshoot via LLDP, edit port settings, and manage network policies.

Port Management

Port Configuration Basics

Configures global and per-port settings like jumbo frames, description, type, status, and speed/duplex.

Link Aggregation and LACP

Explains bundling physical ports into a single logical channel (LAG) for bandwidth and redundancy.

Managing Power-over-Ethernet Devices

PoE Operation and Properties

Explains PoE operation stages, modes, and properties like power limits and traps.

Configuring PoE Power, Priority, and Class

Configures PoE settings per port, including power limits, priority, and class.

VLAN Management

VLAN Basics and Settings

Defines VLANs, explains tagged/untagged members, PVID, GVRP, and VLAN roles.

VLAN Creation and Interface Configuration

Covers creating VLANs, configuring VLAN interface settings (mode, PVID), and defining VLAN membership.

Voice VLAN Configuration

Assigns VoIP traffic to a specific VLAN and configures QoS, and manages Telephony OUIs.

Configuring the Spanning Tree Protocol

Interface and RSTP Configuration

Multiple Spanning Tree Protocol (MSTP)

MST Instance Settings

Managing MAC Address Tables

Static MAC Address Configuration

Dynamic MAC Address Management

Configuring Multicast Forwarding

Multicast Forwarding and Registration

IGMP and MLD Snooping

Configuring IP Information

IP Addressing Fundamentals

IPv4 Configuration

IPv6 Configuration

ARP and DNS Configuration

Configuring Security

User and Password Management

Authentication Servers (TACACS+/RADIUS)

Access Control Methods

Storm Control and Port Security

802.1X Authentication

Implements port-based network access control using 802.1x, including dynamic VLAN assignment and guest VLANs.

Denial of Service Prevention

Prevents network attacks by filtering packets with specific IP parameters or known malicious content.

Access Control

Access Control Lists (ACLs)

MAC, IPv4, and IPv6 ACL Configuration

Configuring Quality of Service

QoS Fundamentals and Modes

QoS Configuration Workflow

Outlines steps for configuring QoS, including modes, queues, bandwidth, DSCP/CoS mapping, and policies.

QoS Advanced Mode Features

Uses policies, class maps, and policers for per-flow QoS, including DSCP remarking and aggregate policers.

Configuring SNMP

SNMP Versions, Workflow, and MIBs

SNMP Engine ID and Views

SNMP Groups and Users

SNMP Communities and Traps

Console Menu Interface

Terminal Emulation and TCP/IP Connections

Security and VLAN Management

IP Configuration

Configures IPv4/IPv6 addresses, default routes, network settings, and HTTP/HTTPS services.

File Management and Active Image

Manages firmware files, upgrades, backups, and selects the active boot image.

Port and PoE Configuration