VLANs spanning multiple switches | Nortel Networks 1000BASE-SX

60 Chapter 2 Network configuration

VLANs spanning multiple switches

You can use VLANs to segment a network within a switch. When you connect multiple switches, it is possible to connect users of one VLAN with users of that same VLAN in another switch. However, the configuration guidelines depend on whether both switches support 802.1Q tagging.

With 802.1Q tagging enabled on a port for a VLAN, all frames leaving the port for that VLAN are marked as belonging to that specific VLAN. You can assign specific switch ports as members of one or more VLANs that span multiple switches, without interfering with the Spanning Tree Protocol.

VLANs spanning multiple 802.1Q tagged switches

Figure 17 shows VLANs spanning two BayStack 420 switches. The 802.1Q tagging is enabled on S1, port 2 and on S2, port 1 for VLAN 1 and VLAN 2. Both ports are tagged members of VLAN 1 and VLAN 2.

Figure 17 VLANs spanning multiple 802.1Q tagged switches

VLAN 1

VLAN 2

BayStack

S1 420

Both ports are tagged members of VLAN 1 and VLAN 2

BayStack

S2 420

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209418-A

Image 60

Nortel Networks 1000BASE-SX, 1000ASE-XD VLANs spanning multiple switches, VLANs spanning multiple 802.1Q tagged switches

Contents

Using the BayStack 420 10/100/1000 Switch Copyright 2001 Nortel Networks TrademarksRestricted rights legend Statement of conditions Using the BayStack 420 10/100/1000 Switch Japan/Nippon Requirements OnlyTaiwan Requirements Canada Requirements Only Nortel Networks Inc. software license agreement Using the BayStack 420 10/100/1000 Switch 209418-A Contents Chapter Network configuration Contents Chapter Using the console interface Chapter Troubleshooting Appendix B Installing a Gigabit Interface Converter Gbic Contents 209418-A Configuring power workgroups and a shared media hub Using the BayStack 420 10/100 Ethernet Switch Choosing the MultiLink Trunk Configuration Menu screen Figures Figures 209418-A Tables Tables Preface Before you begin Text conventions Italic text Related publications How to get help Technical Solutions Center Telephone Preface 209418-A BayStack 420 Switch Physical description Components on the BayStack 420 Switch front panel Front panelConsole port Description Port connectors Gigabit Interface Converter Gbic BayStack 420 Switch LED display panel LED display panel BayStack 420 Switch BayStack 420 Switch LED descriptions Label Type Color State Meaning Cascade Up and Down connectors Components on the BayStack 420 Switch back panelBack panel Cooling fans AC power receptacle International power cord specificationsCountry/Plug description Specifications Typical plug Vorsicht Bitte sofort lesen Advertencia Sírvase leer inmediatamente Features Virtual Local Area Networks VLANs BayStack 420 Switch security feature Security BayStack 420 Switch RADIUS-based network security MAC address-based security Switch software image storage Configuration parameters storageFlash memory storage MultiLink Trunking Port mirroring conversation steeringAutosensing, autonegotiation, and autopolarity RFCs Standards Snmp MIB support Snmp MIB supportApplication Standard MIBs Proprietary MIBs BootP automatic IP configuration/MAC address Trap name Configurable Sent when RFC 1215 industry standardSnmp trap support Support Snmp traps Configuration and switch management BayStack 420 Switch Network configuration examples Desktop switch application Segment switch application Network configuration BayStack 420 Switch used as a segment switch High-density switched workgroup application BayStack 420 Switch stack operation Unit Select switch Initial installation Base unitStack MAC address Stack configurations Stack up configurationsRemoving a unit from the stack Stack down configurations Stack up configuration description Stack down configuration example Stack down configuration description Ieee 802.1Q Vlan workgroups Ieee 802.1Q tagging Port-based Vlan example Network configuration Default Vlan settings Port-based Vlan assignment 802.1Q tag assignment VLANs spanning multiple switches VLANs spanning multiple 802.1Q tagged switches Vlans spanning multiple untagged switches VLANs spanning multiple untagged switches Possible problems with VLANs and Spanning Tree Protocol Shared servers Multiple VLANs sharing resources Vlan broadcast domains within the switch Default Vlan Configuration screen example Vlan Configuration screen example Default Vlan Port Configuration screen example Vlan Port Configuration screen example Vlan workgroup summary Vlan configuration spanning multiple switches Vlan configuration rules MultiLink Trunks Switch-to-switch trunk configuration example Client/server configuration using MultiLink Trunks Switch-to-server trunk configuration example Trunk configuration screen examples Client/server configuration example Trunk configuration screen for Switch S1 MultiLink Trunk Configuration Menu screen opens Figure MultiLink Trunk Configuration screen for Switch S1 Trunk configuration screen for Switch S2 Shows the MultiLink Trunk Configuration screen for Switch S2 Trunk Configuration screen for Switch S3 Shows the MultiLink Trunk Configuration screen for Switch S3 Trunk Configuration screen for Switch S4 Shows the MultiLink Trunk Configuration screen for Switch S4 Before you configure trunks Spanning tree considerations for MultiLink Trunks Path Cost arbitration example Example 1 correctly configured trunk Example 2 detecting a misconfigured port Additional tips about the MultiLink Trunking feature Port mirroring Yes Chapter Using the console interface Accessing the CI menus and screens Using the CI menus and screens Using the console interfaceNavigating the CI menus and screens Screen fields and descriptions Map of console interface screens Main menu Describes the CI main menu options Console interface main menu options Option Description Switch Configuration ConfigurationConfiguration File Reset Option Description Reset to Default SettingsLogout IP Configuration/Setup screen Describes the IP Configuration/Setup screen fields IP Configuration/Setup screen fields Choosing a BootP request mode Default GatewayField Description In-Band Subnet Mask BootP When Needed BootP Disabled Snmp Configuration screen Describes the Snmp Configuration screen fieldsSnmp Configuration screen fields Field Description Read-Only System Characteristics screen Authentication TrapField Description Read-Write Trap #1 IP Address1 Describes the System Characteristics screen fields System Characteristics screen fields Field Description Reset Count Last Reset TypePower Status SysServices Switch Configuration Menu screen Describes the Switch Configuration Menu options Switch Configuration Menu options MAC Address Table screen Option Description Clear All Port Statistics Describes the MAC Address Table screen fields MAC Address Table screen fieldsField Description Aging Time Find an Address MAC Address Security Configuration Menu screen MAC Address Security Configuration Menu options MAC Address Security Configuration screen fields Field Description MAC Address SecuritySNMP-Locked Field Description Partition Port on Intrusion DetectedPartition Time DA Filtering on Intrusion MAC Address Security Port Configuration screen Current Learning ModeField Description Clear by Ports Learn by Ports MAC Security Port Configuration screen 1 Describes the MAC Security Port Configuration screen fields MAC Security Port Configuration screen fieldsMAC Address Security Port Lists screens MAC Address Security Port Lists screens Port list syntax Describes the MAC Address Security Port Lists screen fieldsMAC Address Security Port Lists screen fields Field Entry Port List Description Accelerator keys for repetitive tasks Adding a new port to an existing port number list Removing a port from an existing port number list MAC Address Security Table screens MAC Address Security Table screens Describes the MAC Address Security Table screen fields MAC Address Security Table screen fieldsField Description Find an Address Allowed Source Vlan Configuration Menu screen Field Description Describes the Vlan Configuration Menu options Vlan Configuration Menu optionsOption Description Vlan Configuration 122. This screen allows you to set up Vlan workgroups Vlan Configuration screen Describes the Vlan Configuration screen fields Vlan Configuration screen fieldsField Description Create Vlan Delete Vlan Vlan Name Management VlanUser-Defined PID Vlan State Vlan Port Configuration screen Describes the Vlan Port Configuration screen fields Vlan Port Configuration screen fieldsField Description Unit Filter Untagged Frames Vlan Display by Port screen TaggingAuto Pvid Describes the Vlan Display by Port screen fields Vlan Display by Port screen fieldsVLANs Port Configuration screen Describes the Port Configuration screen fields Port Configuration screen fieldsStatus Link High Speed Flow Control Configuration screen Field Description LnkTrapAutonegotiation Speed/Duplex1 High Speed Flow Control Configuration screen fields Flow Control Choosing a high speed flow control mode MultiLink Trunk Configuration Menu screenSymmetric mode Asymmetric mode MultiLink Trunk Configuration Menu screen 209418-A MultiLink Trunk Configuration screen Describes the MultiLink Trunk Configuration Menu optionsMultiLink Trunk Configuration Menu options Describes the MultiLink Trunk Configuration screen fields MultiLink Trunk Configuration screen fieldsField Description Trunk Trunk Members Trunk Mode MultiLink Trunk Utilization screenField Description STP Learning Trunk Status MultiLink Trunk Utilization screen 1 Port Mirroring Configuration screen Describes the MultiLink Trunk Utilization screen fieldsMultiLink Trunk Utilization screen fields Describes the Port Mirroring Configuration screen fields Port Mirroring Configuration screen fieldsField Description Monitoring Mode Port Statistics screen Monitoring modesField Description Monitor Unit/Port Field Description Port-based Describes the Port Statistics screen fields Port Statistics screen Port Statistics screen fields Using the console interface Port Statistics screen fields System Log screen Pause Frames Port 25 only Describes the System Log screen fields System Log screen fieldsDisplay Messages From Console/Comm Port Configuration screen Field Description Display configurationComplete? Clear Messages From Describes the Console/Comm Port Configuration screen fields Console/Comm Port Configuration screen fields Console Switch Password Type Password Type Telnet SwitchSwitch Password Field Description Console Stack Default Value secure Range Stack Password Field Description Console Read-Only Primary Radius Server Secondary RadiusServer Radius UPD Port Renumber Stack Units screen Renumber Stack Units screen Hardware Unit Information screen Describes the Renumber Stack Units screen fieldsRenumber Stack Units screen fields Spanning Tree Configuration Menu screen Hardware Unit Information screen Describes the Spanning Tree Configuration Menu options Spanning Tree Configuration Menu optionsOption Description Spanning Tree Port Configuration Spanning Tree Switch Settings Spanning Tree Port Configuration screen Spanning Tree Port Configuration screen 1 209418-A Spanning Tree Port Configuration screen 2 Spanning Tree Port Configuration screen fields Field Description Participation PriorityPath Cost Spanning Tree Switch Settings screen Describes the Spanning Tree Switch Settings parameters Spanning Tree Switch Settings parameters Parameter Description Forward Delay DelayBridge Hello Bridge Telnet Configuration screen Telnet Configuration screen 209418-A Describes the Telnet Configuration screen fields Telnet Configuration screen fields Software Download screen Field Description Allowed Source Using the console interface Diagnostics Filename Describes the Software Download screen fieldsSoftware Download screen fields Field Description BayStack Configuration File Download/Upload screen LED Indications during the download processField Description Tftp Server IP Start Tftp Load Configuration File Download/Upload screen 209418-A Configuration File Download/Upload screen fields Parameters not saved to the configuration file RequirementsThese parameters are not saved Used in this screen See Chapter Troubleshooting Interpreting the LEDs Troubleshooting LED display panel Diagnosing and correcting problems Troubleshooting BayStack 420 Switch LED descriptions Normal power-up sequence Symptom Probable cause Corrective actionCorrective actions Port connection problems Autonegotiation modes Port interface Environmental specifications EnvironmentalElectrical Electrical parameters Physical dimensions Performance specificationsLists physical dimensions for the BayStack 420 Switch Safety agency certification Appendix a Technical specificationsNetwork protocol and standards compatibility Electromagnetic emissions BayStack 420 Switch meets the EN50082-11997 standard Electromagnetic immunity Appendix B Installing a Gigabit Interface Converter Gbic Product description Appendix B Installing a Gigabit Interface Converter Gbic Gbic labeling Standards, connectors, cabling, and distance Gbic specificationsGbic specifications are listed in Table Gbic Models Model 1000BASE-SX Gbic specifications Type SpecificationsLaser Transmitter Characteristics Receiver Characteristics Model 1000BASE-LX Gbic specifications Model 1000ASE-XD Gbic specifications 1000BASE-XD Model 1000BASE-ZX Gbic specifications 1000BASE-ZX Handling, safety, and environmental guidelines Installing a Gbic Installing a Gbic Appendix C Quick configuration for MultiLink Trunking Appendix C Quick configuration for MultiLink Trunking Configuring MultiLink Trunks RJ-45 10BASE-T/100BASE-TX port connectors RJ-45 8-pin modular port connector Appendix D Connectors and pin assignments RJ-45 port connector pin assignmentsPin Signal Description MDI and MDI-X devices MDI-X to MDI cable connections MDI-X to MDI cable connections DB-9 RS-232-D Console/Comm Port connector MDI-X to MDI-X cable connections Lists the DB-9 Console port connector pin assignments DB-9 Console port connector pin assignments Appendix D Connectors and pin assignments 209418-A Factory default settings Field Default setting Appears in this CI screen Appendix E Default settings Factory default settings Menu screen on Appendix E Default settings Port Configuration screen on Port Mirroring Configuration screen Telnet Configuration screen on Appendix E Default settings 209418-A Appendix F Sample BootP configuration file Using the BayStack 420 10/100 Switch Appendix F Sample BootP configuration file Index Index Index Index Index