User`s guide
Table Of Contents
- User’s Guide
- Introduction and Hardware
- Basic Configuration
- Advanced
- VLAN
- Static MAC Forward Setup
- Filtering
- Spanning Tree Protocol
- 11.1 STP/RSTP Overview
- 11.1.1 STP Terminology
- 11.1.2 How STP Works
- 11.1.3 STP Port States
- 11.1.4 Multiple RSTP
- 11.2 Spanning Tree Protocol Main Screen
- 11.3 Configure Rapid Spanning Tree Protocol
- 11.4 Rapid Spanning Tree Protocol Status
- 11.5 Configure Multiple Rapid Spanning Tree Protocol
- 11.6 Multiple Rapid Spanning Tree Protocol Status
- Bandwidth Control
- Broadcast Storm Control
- Mirroring
- Link Aggregation
- Port Authentication
- Port Security
- Classifier
- Policy Rule
- Queuing Method
- VLAN Stacking
- Multicast
- 22.1 Multicast Overview
- 22.1.1 IP Multicast Addresses
- 22.1.2 IGMP Filtering
- 22.1.3 IGMP Snooping
- 22.2 Multicast Status
- 22.3 Multicast Setting
- 22.4 IGMP Filtering Profile
- 22.5 MVR Overview
- 22.5.1 Types of MVR Ports
- 22.5.2 MVR Modes
- 22.5.3 How MVR Works
- 22.6 General MVR Configuration
- 22.7 MVR Group Configuration
- 22.7.1 MVR Configuration Example
- IP Application
- Management
- Maintenance
- 28.1 The Maintenance Screen
- 28.2 Firmware Upgrade
- 28.3 Restore a Configuration File
- 28.4 Backup a Configuration File
- 28.5 Load Factory Default
- 28.6 Save Configuration
- 28.7 Reboot System
- 28.8 FTP Command Line
- 28.8.1 Filename Conventions
- 28.8.2 FTP Command Line Procedure
- 28.8.3 GUI-based FTP Clients
- 28.8.4 FTP Restrictions
- Access Control
- 29.1 Access Control Overview
- 29.2 The Access Control Main Screen
- 29.3 About SNMP
- 29.3.1 Supported MIBs
- 29.3.2 SNMP Traps
- 29.3.3 Configuring SNMP
- 29.4 SSH Overview
- 29.5 How SSH works
- 29.6 SSH Implementation on the Switch
- 29.6.1 Requirements for Using SSH
- 29.7 Introduction to HTTPS
- 29.8 HTTPS Example
- 29.8.1 Internet Explorer Warning Messages
- 29.8.2 Netscape Navigator Warning Messages
- 29.8.3 The Main Screen
- 29.9 Service Port Access Control
- 29.10 Remote Management
- Diagnostic
- Syslog
- Cluster Management
- MAC Table
- IP Table
- ARP Table
- Routing Table
- Configure Clone
- Maintenance
- CLI and Troubleshooting
- Introducing Commands
- 38.1 Overview
- 38.2 Accessing the CLI
- 38.2.1 The Console Port
- 38.3 The Login Screen
- 38.4 Command Syntax Conventions
- 38.5 Changing the Password
- 38.6 Privilege Levels
- 38.7 Command Modes
- 38.8 Getting Help
- 38.8.1 List of Available Commands
- 38.9 Using Command History
- 38.10 Saving Your Configuration
- 38.10.1 Configuration File
- 38.10.2 Logging Out
- 38.11 Command Summary
- 38.11.1 User Mode
- 38.11.2 Enable Mode
- 38.11.3 General Configuration Mode
- 38.11.4 interface port-channel Commands
- 38.11.5 interface route-domain Commands
- 38.11.6 config-vlan Commands
- 38.12 mvr Commands
- User and Enable Mode Commands
- 39.1 Overview
- 39.2 show Commands
- 39.2.1 show system-information
- 39.2.2 show ip
- 39.2.3 show logging
- 39.2.4 show interface
- 39.2.5 show mac address-table
- 39.3 ping
- 39.4 traceroute
- 39.5 Copy Port Attributes
- 39.6 Configuration File Maintenance
- 39.6.1 Using a Different Configuration File
- 39.6.2 Resetting to the Factory Default
- Configuration Mode Commands
- 40.1 Change the Out of Band Management IP Address
- 40.2 Enabling IGMP Snooping
- 40.3 Configure IGMP Filter
- 40.4 Enabling STP
- 40.5 no Command Examples
- 40.5.1 Disable Commands
- 40.5.2 Resetting Commands
- 40.5.3 Re-enable commands
- 40.5.4 Other Examples of no Commands
- 40.6 Static Route Commands
- 40.7 Enabling MAC Filtering
- 40.8 Enabling Trunking
- 40.9 Enabling Port Authentication
- 40.9.1 RADIUS Server Settings
- 40.9.2 Port Authentication Settings
- Interface Commands
- 41.1 Overview
- 41.2 Interface Command Examples
- 41.2.1 interface port-channel
- 41.2.2 bpdu-control
- 41.2.3 broadcast-limit
- 41.2.4 bandwidth-limit
- 41.2.5 mirror
- 41.2.6 gvrp
- 41.2.7 ingress-check
- 41.2.8 frame-type
- 41.2.9 weight
- 41.2.10 egress set
- 41.2.11 qos priority
- 41.2.12 name
- 41.2.13 speed-duplex
- 41.2.14 test
- 41.3 Interface no Command Examples
- 41.3.1 no bandwidth-limit
- IEEE 802.1Q Tagged VLAN Commands
- 42.1 Configuring Tagged VLAN
- 42.2 Global VLAN1Q Tagged VLAN Configuration Commands
- 42.2.1 GARP Status
- 42.2.2 GARP Timer
- 42.2.3 GVRP Timer
- 42.2.4 Enable GVRP
- 42.2.5 Disable GVRP
- 42.3 Port VLAN Commands
- 42.3.1 Set Port VID
- 42.3.2 Set Acceptable Frame Type
- 42.3.3 Enable or Disable Port GVRP
- 42.3.4 Modify Static VLAN
- 42.3.5 Delete VLAN ID
- 42.4 Enable VLAN
- 42.5 Disable VLAN
- 42.6 Show VLAN Setting
- Multicast VLAN Registration Commands
- Routing Domain Command Examples
- Troubleshooting
- Introducing Commands
- Appendices and Index
GS-2724 User’s Guide
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CHAPTER 20
Queuing Method
This chapter introduces the queuing methods supported.
20.1 Queuing Method Overview
Queuing is used to help solve performance degradation when there is network congestion. Use
the Queuing Method screen to configure queuing algorithms for outgoing traffic. See also
Priority Queue Assignment in Switch Setup and 802.1p Priority in Port Setup for related
information.
Queuing algorithms allow switches to maintain separate queues for packets from each
individual source or flow and prevent a source from monopolizing the bandwidth.
20.1.1 Strictly Priority Queuing
Strictly Priority Queuing (SPQ) services queues based on priority only. As traffic comes into
the Switch, traffic on the highest priority queue, Q7 is transmitted first. When that queue
empties, traffic on the next highest-priority queue, Q6 is transmitted until Q6 empties, and
then traffic is transmitted on Q5 and so on. If higher priority queues never empty, then traffic
on lower priority queues never gets sent. SP does not automatically adapt to changing network
requirements.
20.1.2 Weighted Round Robin Scheduling (WRR)
Round Robin Scheduling services queues on a rotating basis and is activated only when a port
has more traffic than it can handle. A queue is a given an amount of bandwidth irrespective of
the incoming traffic on that port. This queue then moves to the back of the list. The next queue
is given an equal amount of bandwidth, and then moves to the end of the list; and so on,
depending on the number of queues being used. This works in a looping fashion until a queue
is empty.
Weighted Round Robin Scheduling (WRR) uses the same algorithm as round robin
scheduling, but services queues based on their priority and queue weight (the number you
configure in the queue Weight field) rather than a fixed amount of bandwidth. WRR is
activated only when a port has more traffic than it can handle. Queues with larger weights get
more service than queues with smaller weights. This queuing mechanism is highly efficient in
that it divides any available bandwidth across the different traffic queues and returns to queues
that have not yet emptied.