Inter-Switch Links | Asante Technologies 8000 specs

VLAN Management

By default, independent learning of addresses is enabled. Under independent learning, all addresses learned in a VLAN are stored in an address table for that VLAN only, and all forwarding decisions for that VLAN are made by consulting that table. This can sometimes cause unexpected results if a port is a member of more than one VLAN.

For example, assume a port is a member of VID 1 and VID 2, and VID 1 has already learned MAC address X. Unicast traffic from the port that is destined for X will be forwarded correctly in VLAN 1. But if the address is not present in the VLAN 2 forwarding table, the frame will be flooded to all ports in VLAN 2.

To prevent this undesired flooding, the address tables may be shared. When shared learning is enabled, a single forwarding table is used by all VLANs that are members of the shared group.

Each address database in the system is represented by a Filtering ID (FID). For independent learning VLANs, the FIDs are assigned by the system beginning from 0. Shared learning VLANs are represented by FIDs beginning at 65.

Inter-Switch Links

An inter-switch link (ISL) is a port that connects VLANS that reside on two different switches; it’s the means to share VLAN information between switches on a network.

For example, consider the two-switch network in Figure 4-6, which connects the ethernet segments, E-1 through E-9. Assume port 1 on each switch is set up as default; it passes untagged frames. Also assume port 2 on each switch is configured to only accept tagged frames, which limits traffic to VLAN 1. In that case, VID 1 frames from E-1 will never reach E-5.

An ISL is necessary to connect VLAN 1 across the switches. This is done by configuring port 1 as a member of VLAN 1 on both switch 1 and switch 2. Both instances of port 1 must transmit tagged frames, and a typical ISL is also configured to drop untagged frames. In that case, VLAN 1 is connected across the switches.

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Asante Technologies 8000 user manual Inter-Switch Links

Contents

IntraCore Limited Five Year Warranty Table of Contents Configuration Viewing Legends for Configuration Settings Advanced Management Unicast Forwarding Database Configuration Web Browser Management MIB Statistics Technical SupportPage IntraCore Architecture Overview Core Switching Engine Network Management, Security, Performance, and Control Infrastructure ConnectivityLAN MAN/WAN Mance IntraCore Product Family Enterprise Switches Edge Switches IntraCore Port 10/100 Switch ModuleExpansion Modules IntraCore 1000Base SX Gbic Gigabit Ethernet Switch Module1000BaseLX Long Haul Gbic 1000BaseLX Gbic Feature Description FeaturesFeatures VLANs Introduction Feature Description Configuration Default Setting Defaults and SpecificationsDefaults and Specifications Color and Meaning LEDs Power Requirements Installation GuidelinesEnvironmental Requirements Cooling and Airflow Step Action to Be Taken Installation Overview Installation in an Equipment Rack Chassis Installation/PlacementSafety Precautions for Rack Installation Equipment Rack Guidelines Equipment Rack Installation Procedure Free-Standing/Desktop Placement Two Stack Configuration Stacking SwitchesThree or Four Stack Configuration Stacking Switches Four stack configuration Installing Port Expansion Modules Installing Port Expansion Modules Removing a Gbic Installing Gbic InterfacesInstalling a Gbic Gbic Care and Handling Connecting PowerConnecting Power Connecting To Cable Required Connecting to the Network10/100BaseX Ports Cabling Procedures 1000BaseX Ports Cabling Procedures Configuring for ManagementBootP Configuration Configuring for Management Connecting To a Console Out-of-Band Management Management OptionsManagement Options Method Type Description Telnet In-Band Management SNMP-Based Management Web Browser Installation and Setup Configuration Logging Local Management Interface Main Menu Accessing a SubmenuExiting a Submenu Local Management Interface 4MB Viewing General Information Viewing General Information Setting Description Menu Item Description Configuration MenuConfiguration Menu Options Snmp Configuration Configuration Menu Changing System Administration Info System Administration ConfigurationCurrent Settings System IP Configuration System IP Configuration Changing System IP Information Describes each setting on the System IP Configuration Menu Image Banks Bootstrap ConfigurationBootstrap Configuration Loading Software Locally Loading Software Remotely Remote Bootstrap Configuration Menu Date Rently running on the IntraCore Load Mode Current Settings Bootstrap Configuration Empty Snmp Configuration Changing Community Strings Snmp Configuration Adding or Updating a Trap Receiver Enabling Authentication Traps Deleting a Trap Receiver Port ConfigurationPort Configuration 10 Port Configuration Menu for 10/100BaseTX modules 11 Legends for all Port Configuration Menus Viewing Legends for Configuration Settings Enabling or Disabling a Port Current Port Settings Configuring Auto-Negotiation Toggling Half to Full Duplex Configuring a Port ManuallyToggling Port Link Speed 12 Port Configuration Menu for 1000BaseX ports Configuring 1000BaseX Ports Enabling or Disabling a Port Advanced Port Configuration Advanced Port ConfigurationAdvanced 10/100BaseTX Port Configuration 14 Advanced Port Configuration Menu 1000BaseX port Advanced 1000BaseX Port Configuration Flow Control Setting the Maximum Broadcast or Multicast Rate Enabling or Disabling 802.3x Flow Control Global Port Configuration Global Port ConfigurationSetting Port Default Priority 15 Global Port Configuration Menu 10/100BaseTX ports Unicast Forwarding Database Configuration Unicast Forwarding Database Configuration Age-out Time Displaying the Forwarding Database Unicast Forwarding Database Configuration MPT Searching for a MAC Address 20 MAC Address Search summary Setting the MAC Address Age-Out Time 21 Image File Downloading Configuration Menu Image File Downloading Configuration Image Downloading Through Tftp Image File Downloading Configuration 10 describes each setting on the Tftp Image Downloading Menu Performing a Software Upgrade at Runtime 23 X/Y/Z Modem Image File Downloading Menu Serial Downloading Configuration Performing a Software Upgrade 24 Baud Rate Menu System Reset Configuration System Reset Configuration Option Description Resetting the IntraCoreCurrent Options Viewing the System Log Scheduling a System ResetViewing the System Log 26 System Log Menu Clearing the System Log User Interface Configuration User Interface Configuration Configuration Setting Description Changing the Password Setting Console Idle Time-out PeriodSetting Telnet Idle Time-out Period Page 29 Systems Module Map Viewing Statistics Configuration 31 Port Statistics Counters since reset Configuration Overview Spanning Tree Protocol Enabling and Disabling STP How It Works Spanning Tree Parameters Configuring Spanning Tree ParametersBridge Priority Hello Time Port Priority Forward DelayMaximum Age ID is the Bridge Priority. If the Bridge ID is shown as Current STP Settings Setting Port Priority and Path Cost Spanning Tree Port Configuration Snmp and Rmon Management Snmp and Rmon Management Rmon Management Alarm GroupEthernet Statistics Group Ethernet History Group Security Option Description Action Security ManagementSecurity Management Security Traps Enabling and Disabling Duplicated IP Detection Duplicated IP Detection and TrapEnabling and Disabling Duplicated IP Trap Viewing a List of Duplicated IP Addresses Similar to Figure Enabling and Disabling Station Movement Trap Port Security Configuration Menu Configuring Port Security Advanced Management Setting Description Configuring Port New Node Detection Trap Configuring Port Lock and Intruder Lock Configuring Security Level 2 or Level Inserting/Modifying a Port Trusted MAC Address Setting the Intruder TrapResetting Security to Defaults Vlan Management Vlan Specifications for the IntraCore Overview of VLANs Other Vlan Features in IntraCoreBenefits of Vlan Management Vlan Management Abbreviations Tagged and Untagged Frames Vlan Groups Default VlanPort Vlan ID Vlan Port Membership and Untagging Independent vs. Shared Learning Inter-Switch Links Frame Type Filter Port Receive Ingress VLANs Untagset All Frames Disabled Yes Describes each setting on the Vlan Management Menu Configuring Vlan Management FID Configuring Static Vlan Groups Vlan Index Creating a Vlan Removing a Vlan Enabling and Disabling Management AccessNaming a Vlan Adding Port Members Moving Ports to This Vlan Advanced Static Vlan ConfigurationDeleting Port Members Specifying Shared or Independent Address Learning Specifying Tagging or No Tagging for a Port Inserting and Removing MAC Addresses 10 Vlan Port Configuration Menu Configuring Vlan Port Attributes Setting the Port Vlan ID Enabling and Disabling Port Ingress Filtering Configuring Port Receive Frame TypeAdding and Deleting VLANs from the Port Adding an ISL Port to VLANs Configuring Inter-Switch LinksEnabling and Disabling Port Gvrp Status Configuring the ISL Port to Receive Tagged Frames Configuring Tagging for the ISL Port on Each Vlan Displaying a Vlan Port Summary Displaying a Summary of Vlan Groups Displaying a Vlan FID-VID Association Summary Resetting Vlan Configuration to DefaultsConfiguring Gvrp 15 Gvrp Configuration Menu Disabling Gvrp on a Group of Ports Enabling and Disabling System GvrpEnabling Gvrp on a Group of Ports 16 Vlan Forbidden Set Configuration Menu Configuring Vlan Forbidden Sets 17 Vlan Registration Fixed Set Configuration Menu Configuring Registration Fixed Sets Multicast Addresses Multicast Traffic Management Igmp Snooping IP Multicast Quality of Service RsvpGmrp Garp Multicast Registration Protocol Multicast Traffic Management 18 Multicast Traffic Management Menu Configuring Multicast Traffic Management Enabling and Disabling Gmrp Enabling and Multicast Poliocy-based Quality of ServiceEnabling and Disabling Igmp Snooping Displaying a Summary of Group Addresses 19 Summary of Group Addresses Multicast Forwarding Database Configuration Removing a Multicast Group Address Adding ports to the Selected AddressInserting a Multicast Group Address Advanced Management Web Browser Management Accessing with a Web Browser Web Browser Management Overview Management Buttons Port Activity IndicatorFront Panel Button Front Panel Display Port Configuration and Statistics Port Selector Feature Genl Info General Information Button Genl Info General Information Button Statistics Button Statistics Bar Chart Statistics Button Line chart of received frames for a port -7 the counters for a port are displayed in bar graph form Bar graph of counters for a port Port Configuration table Port Config Port Configuration Button Span Tree Spanning Tree Button Span Tree Spanning Tree Button Snmp Button 10 Snmp Configuration Addr Address Table Button Addr Address Table Button Vlan Button Port Configuration Vlan Button Vlan Configuration Creating or Modifying a Vlan 14 Vlan Group Configuration options Adding and Deleting Port Members 16 Add/Delete Port Member dialog box Duplicate IP Button Duplicate IP Button Web Browser Management Contacting Technical Support Technical Support A-2 MIB Object Definitions for Counters FCS ErrorsReadable Frames Readable Octets Short Events Alignment ErrorsFrame Too Longs MIB Object Definitions for Counters RuntsCollisions Late Events Auto Partitions Very Long EventsMismatches Total Errors