© 2006 Cisco Systems, Inc. All rights reserved.BCMSN v Defining VLANs Implementing VLANs

© 2006 Cisco Systems, Inc. All rights reserved.BCMSN v What Is an End-to-End VLAN? Users are grouped into VLANs independent of physical location. If users are moved within the campus, their VLAN membership remains the same.

© 2006 Cisco Systems, Inc. All rights reserved.BCMSN v What Is a Local VLAN? Local VLANs are generally confined to a wiring closet.

© 2006 Cisco Systems, Inc. All rights reserved.BCMSN v Benefits of Local VLANs in the ECNM Deterministic traffic flow Active redundant paths High availability Finite failure domain Scalable design

© 2006 Cisco Systems, Inc. All rights reserved.BCMSN v VLAN Configuration Modes Global Mode Switch# configure terminal Switch(config)# vlan 3 Switch(config-vlan)# name Vlan3 Switch(config-vlan)# exit Switch(config)# end

© 2006 Cisco Systems, Inc. All rights reserved.BCMSN v VLAN Configuration Modes Database Mode Switch# vlan database Switch(vlan)# vlan 3 VLAN 3 added: Name: VLAN0003 Switch(vlan)# exit APPLY completed. Exiting....

© 2006 Cisco Systems, Inc. All rights reserved.BCMSN v VLAN Access Ports The access switch port associated with a single data VLAN

© 2006 Cisco Systems, Inc. All rights reserved.BCMSN v VLAN Implementation Commands Configuring VLANs vlan 101 switchport mode access switchport access vlan 101 Verifying VLANs show interfaces show vlan

© 2006 Cisco Systems, Inc. All rights reserved.BCMSN v How to Implement a VLAN Create or configure a VLAN. Verify VLAN configuration. Associate switch ports with the VLAN. Verify switch port configuration. Test VLAN connectivity. Implement VLAN and switch security.

© 2006 Cisco Systems, Inc. All rights reserved.BCMSN v Configuring an Access VLAN Switch(config)# vlan vlan_id Create a VLAN. Switch(config-vlan)# name vlan_name Provide a VLAN name. Switch(config-if)# switchport mode access Place the switch port into access mode. Switch(config-if)# switchport access vlan vlan_id Associate the access switch port with a VLAN.

© 2006 Cisco Systems, Inc. All rights reserved.BCMSN v Verifying the Access VLAN Configuration Switch#show vlan VLAN Name Status Ports default active Fa0/1, Fa0/2, Fa0/3, Fa0/4 Fa0/5, Fa0/7, Fa0/9 11 asw11_data active 12 asw12_data active 95 VLAN0095 active Fa0/8 99 Trunk_Native active 100 Internal_Access active 111 voice-for-group-11 active 112 voice-for-group-12 active 1002 fddi-default act/unsup 1003 token-ring-default act/unsup 1004 fddinet-default act/unsup 1005 trnet-default act/unsup VLAN Type SAID MTU Parent RingNo BridgeNo Stp BrdgMode Trans enet enet

© 2006 Cisco Systems, Inc. All rights reserved.BCMSN v Summary An end-to-end VLAN is geographically dispersed throughout the network. Local VLANs should be created with physical boundaries in mind. VLANs solve issues that arise in a Layer 2 switched network. VLANs can be configured globally or in VLAN database mode. An access switch port is associated with one VLAN. Cisco provides a series of commands to configure a VLAN and verify configuration on an access switch. A series of ordered steps should be followed to implement a VLAN.

© 2006 Cisco Systems, Inc. All rights reserved.BCMSN v