Setting the MTU Size | D-Link DWS 3000 manual

D-Link Unified Access System User Manual

Setting the MTU Size

The MTU determines the maximum size of a packet that can be transmitted through a port in one frame. The default MTU size for the ports on the D-Link WLAN Controller Switch is 1518 bytes. Packets that use the L3 tunnel have an extra 20 bytes in the header for encapsulation. To support these larger frames, you can increase the MTU size on all intermediate ports and WLAN switch ports. The AP can transmit and receive frames of up to 1542 bytes on the LAN port

NOTE: If you use tunneling only for IP telephony, or if you set the MTU size on all wireless clients that use tunneling to 1480, you do not need to increase the MTU size in the network.

The following example shows how to change the MTU size on port 12 (interface 1/0/12 in unit/slot/port format or 0/12 in slot/port format) to 1542 bytes.

1.From the CLI, log on to the switch and enter interface configuration mode for the port to configure.

(switch-prompt) >enable Password:******** (switch-prompt) #configure

(switch-prompt) (Config)#interface 1/0/12

2. Use the mtu command to set the desired maximum transmission unit size for the interface.

(switch-prompt) (Interface 0/12)#mtu 1542

3.To save your changes to NVRAM, exit to Privileged EXEC mode and enter write. Use the following steps to set the MTU size by using the Web interface

1.Log on to the switch and access the Administration > Port Configuration > Port Configuration page.

2.From the Slot/Port or Unit/Slot/Port field, select the port to configure from the drop- down list, or select All to configure all ports.

200 © 2001- 2006 D-Link Corporation/D-Link Systems, Inc. All Rights Reserved.

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D-Link DWS 3000 user manual Setting the MTU Size

Contents

Copyright 2006. All rights reserved FCC Warning CE Mark WarningWarnung Precaución Table of Contents Installing the D-Link Unified Access System Managing and Maintaining D-Link Access Points Configuring the External Radius Server Technical Support Page List of Tables Page List of Figures Sample Wlan Visualization WPA Personal Configuration Symbol Description Example About This DocumentAudience Organization Safety Instructions Safety Cautions Safety Instructions General Precautions for Rack-Mountable Products Battery Handling Reminder Protecting Against Electrostatic DischargePage Link Wlan Controller Switch Overview of the D-Link Unified Access SystemLink Unified Access System Components Link Access Point Wlan Visualization Link Unified Access System Topology Single WCS Deployment Peer Switch WCS Deployment Single WCS with Layer 2 Roaming Support Understanding the User Interfaces Peer WCS with Layer 3 Roaming Support Using the Web Interface Web Interface Layout Interface Configuration Graphic Navigation Menu Using the Command-Line Interface Configuration and Monitoring OptionsWlan Tabs Tools Menu Using Snmp Wireless System Features and Standards Support Tkip AES & Ccmp CLI Syslog Tftp Planning the D-Link Unified Access System Network System Requirements Link Unified Access System Components Wlan Topology Considerations Wiring Closet Topology Access Point-to-Switch Discovery Access Point Placement Network Planning to Support Layer 3 Roaming Inter-Subnet Roaming Installing the Hardware Hardware Overview LED Indicators Front Panel Components Power PoE ModeFor Link/Act/Speed Mode For PoE Mode Rear Panel Description Side Panels10GE Port LEDs Combo SFP Ports Installation Guidelines InstallationPackage Contents Installing the Switch without the Rack Installing the Switch in a Rack Power Failure Powering On the SwitchInstalling the SFP ports Installing the Optional Module Inserting the Fiber-Optic Transceivers into the Switch Install the Module Front Panel of the DEM-410X Connecting the Switch Connecting to the External Redundant Power System Connecting the Switch to the Network Connecting the Switch and AP Directly Connecting the Switch and AP through the L2/L3 Network Connecting to the Core Network Installing the D-Link Unified Access System System Deployment OverviewPage Connecting the Switch to the Network Enabling the Wlan Features on the Switch Field Description Disable Reason AP AuthenticationIP Address AP MAC Validation Preparing the Access Points Logging on to the AP Changing the AP Password Configuring 802.1x Authentication Information on the AP Action Command Configuring AP-to-Switch Authentication InformationConfiguring Vlan Information on the Access Point Example 1 L2 Discovery Discovering Access Points and Peer SwitchesUnderstanding the Discovery Methods Example 2 IP Address of AP Configured in the Switch L2 Discovery Example Example 3 IP Address of Switch Configured in the AP Example 4 Dhcp Option Discovery and Peer Switches Assigning the IP Address to Switches and Managed APs Link Wlan Controller Switch with Routing Disabled Link Wlan Controller Switch with Routing Enabled Switch-prompt Interface 0/2#ip address 192.168.1.24 Enabling the AP and Peer Switch Discovery Link Access Point Link Wireless Device Discovery Protocol Configuring IP Addresses of Peers and APs in the Switch IP Address Range L3/IP DiscoveryIP List Setting the Switch IP Address in the D-Link Access Point WLAN-AP#get managed-ap Setting the Switch Information in the Dhcp Option Options Authenticating and Validating Access Points Configuring AP Authentication Using the Local Database for AP Validation Requiring AP Authentication Installing the D-Link Unified Access System Using the Radius Database for AP Validation Set the Radius server as the validation method Managing Failed or Rogue APs AP Profiles, Networks, and the Local Database Configuring Access Point SettingsAccess Point Profiles Local Access Point Database Networks Configuring AAA and Radius Settings Global Radius ServerSecret Accounting Configuring Wireless Radio Settings MAC AuthenticationDefault Action MAC List Radio Settings State Super a Super GDynamic Turbo RTS Threshold RF Scan Sentry Rate SetsBasic Supported Dtim Period Beacon PeriodAutomatic Channel Automatic Power Initial PowerAdvanced Radio Configuration RF Scan Duration Configuring Ssid Settings Managing Virtual Access Point Configuration Configuring the Default Network Configuring Network Settings Wireless Network Configuration Authentication L3 Tunnel StatusL3 Tunnel Subnet L3 Tunnel Mask Enabling and Configuring Additional VAPs AddressRadius Secret None Configuring a VAP for L3 Tunnels Networks Available to the Wireless Client L3 Roaming Example Configuring AP Security Using No Security Using Static or Dynamic WEP Static WEP Configuration Static WEP Field Description Using WPA/WPA2 Personal or Enterprise WPA Personal Configuration Static WPA Field Description Configuring Valid Access Point Settings Static WPA FieldDescription Valid Access Point Summary Managed ModeLocation Profile Valid AP Configuration Password APs operate Page Managing and Maintaining D-Link Access Points Resetting the Access Points Managing Radio Frequency Settings Configuring Channel Plan and Power Settings RF Channel Plan and Power Configuration RF Channel Plan and Power Adjustment Channel PlanHistory Depth Interval Viewing the Channel Plan History Channel Plan History Initiating Manual Channel Plan Assignments Initiating Manual Power Adjustments Manual Power Adjustments Upgrading the Access Point Software AP Upgrade Field DescriptionServer Address File Path Group Size Managed AP Performing Advanced Access Point Management StatusDownload Count Success Count Enabling AP Debugging Debug Adjusting the Channel and Power AP Debug Field Description Power Status Page Monitoring Wireless Global Information Monitoring Status and Statistics Peer Switches Total AccessManaged Access Global Wlan Statistics Monitoring Status and Statistics Monitoring Peer Switch Status Viewing IP Discovery Status Monitoring All Access Points Monitoring All Access Points AuthenticatedFirmware Version Clients Monitoring Managed Access Point Status Managed Access Point Status Viewing Detailed Managed Access Point Status Configuration Detailed Managed Access Point Status Viewing Managed Access Point Radio Summary Information Viewing Detailed Managed Access Point Radio Information Transmit PowerManaged AP Radio Summary Managed AP Radio Detail Viewing Managed Access Point Neighbor APs Viewing Clients Associated with Neighbor Access Points Managed AP Neighbor StatusEx -802.11g Neighbor AP MAC Neighbor Client Viewing Managed Access Point VAPsNeighbor AP Clients Monitoring Managed AP Statistics Viewing Managed Access Point Ethernet Statistics Viewing Detailed Managed Access Point StatisticsManaged Access Point Wlan Summary Statistics Managed Access Point Ethernet Summary Statistics Viewing Managed Access Point Radio Statistics Viewing Managed Access Point VAP Statistics Viewing Access Point Authentication Failure Status Authentication Failed AP Status Monitoring Rogue and RF Scan Access Points RF Scan Monitoring Associated Client Information Tunnel IP Address Viewing Associated Client StatusAssociated Client Status Summary Viewing Detailed Associated Client Status Associated Client Neighbor AP Status Viewing Associated Client Ssid StatusViewing Associated Client Neighbor AP Status Viewing Associated Client VAP Status Viewing Associated Client Statistics Associated Client Association Summary Statistics Associated Client Summary StatisticsAssociated Client Association Detail Statistics Transmit Retries Viewing Client Authentication Failure Status Transmit Retries FailedDuplicates Received Associated Client Session Detail Statistics Client Authentication Failure Status Failed Client Status Association Failure Count Authentication Failure CountMonitoring and Managing Ad Hoc Clients Ad Hoc Clients Ad Hoc Client Status Detection Mode Configuring Advanced Settings Creating, Configuring, and Managing AP Profiles Multiple AP Profiles Creating, Copying, and Deleting AP Profiles Adding a Profile Applying an AP Profile Applying the AP Profile Configuring Global Settings Enabling Snmp Traps AP Failure StatusClient Failure RF Scan Status Snmp Traps Field Description Configuring QoS QoS Configuration QoS Settings Minimum ContentionMaximum Contention Queue WMM Mode Max. Burst Length Txop Limit Page Visualizing the Wireless Network Importing and Configuring a Background Image Click Wlan Visualization Download Image Setting Up the Graph Components Creating a New Graph Importing and Configuring a Background Image on With a graph definition length of 800 feet Graphing the Wlan Components Multiple Graphs Component Tool Tip Understanding the Menu Bar Options Wlan Visualization Menu Bar OptionsMenu Item Description File View On page 166 shows the difference between the tab view Options Help Sentry Mode Detailed View Tool Tip for Radio Managed AP Information Component Attributes Links/Commands Peer SwitchManaging the Graph Component Information Wireless Client Other AP Feature Default Link Unified Access System Default SettingsDefault D-Link Wlan Controller Switch Settings Wlan Information Default D-Link Access Point Profile SettingsAP Default AP Profile Settings Link Unified Access System Default Settings Virtual Access Point and Network Settings Other Settings Configuring the External Radius Server Configuring Radius Settings for Access PointsRadius Attributes for the Access Point Radius Server Description Range Usage Attribute Radius Server Description Range Usage Attribute Creating and Including an Attribute Dictionary FreeRADIUS Server Configuration ExampleConfiguring Radius Clients Vendor Adding Access Points to the Valid AP Database Configuring Radius Settings for Wireless Clients FreeRADIUS Example for Wireless Client ConfigurationConfiguring Radius for Client MAC Authentication Radius Attributes for Wireless Clients Configuring User-Based Authentication and Dynamic VLANs Configuring MAC Authentication Configuring the Wlan and Tunnel Interfaces L3 Roaming Example Using a Loopback Interface for the Wireless Functions Creating the Vlan Routing Interface Create a Vlan routing interface on Vlan L3 Roaming Example Configuring the L3 Tunnel Network Example of Configuring L3 Roaming by Using the CLI L3 Tunnel Status Description ConfiguredL3 Tunnel Status Values Switch-prompt#wireless ap profile apply Example of Configuring L3 Roaming by Using the Web Interface Configuring Dhcp Relay and the Dhcp Server Configuring the Relay Agent Configuring the Dhcp Server Configure the default router for the address pool L3 Roaming Example Setting the MTU Size Setting the MTU Size Page 802.11e and WMM Standards Support Understanding Quality of ServiceQoS and Load Balancing Coordinating Traffic Flow QoS Queues and Dscp on Packets Edcf Control of Data Frames and Aifs Random Backoff and Contention Windows Packet Bursting for Better Performance Txop Interval for Client Stations 802.1p and Dscp tags Vlan Priority Tags Vlan Priority Dscp Value Warranty and Registration Information All countries and regions excluding USA Warranties Exclusive Software Limited WarrantyHardware Limited Warranty USA Only Limited Warranty USA Only Page Warranty and Registration Information Link Europe Limited Product Warranty Product RegistrationTrademarks Copyright Statement Geographical Scope of the Limited Product Warranty Limitation of Product Warranty Product Type Product Warranty Period Limited Product Warranty PeriodPerformance of the Limited Product Warranty Link Europe Limited Produktgarantie Warrantor Laufzeit der eingeschränkten Garantie Räumlicher Geltungsbereich der eingeschränkten GarantieEinschränkung der Garantie Produkttyp Gewährleistungslaufzeit Leistungsumfang der eingeschränkten GarantieGarantiegeber Link Europe a limité la garantie des produits Etendue géographique de la Garantie Produit Limitée Type de produit Période de Garantie Limitation de la Garantie ProduitPériode de Garantie Produit Limitée Garant Garantía limitada del producto D-LINK EuropaExécution de la Garantie Produit Limitée Cobertura geográfica de la garantía limitada del producto Limitación de la garantía del producto Tipo de producto Período de garantía del Producto Período de la garantía limitada del productoUso de la garantía limitada del producto Link Europe Termini di Garanzia dei Prodotti Garante Periodo di garanzia Ambito geografico della Garanzia limitataLimitazione della Garanzia Prestazioni della Garanzia limitata Londra NW9 5 AB Regno Unito Telefono +44-020-8731-5555Page Technical Support Technical Support Technical Support Technische Unterstützung Assistance technique Asistencia Técnica Supporto tecnico Tech Support for customers within the Netherlands Pomoc techniczna Technická podpora Technikai Támogatás Teknisk Support Link teknisk support på Internettet Teknistä tukea asiakkaille Suomessa Teknisk Support för kunder i Sverige Tech Support for customers within Australia Suporte Técnico Τεχνική Υποστήριξη Emailsupport@dlink.com.sg Tech Support for customers within India Tech Support for customers within the Russia Technical Support Emailsupport@d-link.co.za Tech Support for Latin America customers Техническая поддержка Asistencia Técnica Suporte Técnico 技术支持友冠技術支援 International Offices Europe U. 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