Configure VLANs, Vlan ?, Example | Cisco Systems OL-6426-02 specification

Chapter 5 Configuring a LAN with DHCP and VLANs

Configure VLANs

Configure VLANs

Perform these steps to configure VLANs on your router, beginning in global configuration mode:

	Command			Purpose
Step 1
Step 1	vlan ?			Enters VLAN configuration mode.
	Example:
	Router# config t
	Router(config)#vlan ?
	WORD	ISL VLAN IDs 1-4094
	accounting	VLAN accounting configuration
	ifdescr	VLAN subinterface ifDescr
	Router(config)#vlan
Step 2
Step 2	ISL VLAN ID			Adds VLANs, with identifiers ranging from
	Example:			1- 4094.
	Example:
	Router(config)#vlan		2	For details about this command and additional
	Router(config)#vlan		2	parameters that can be set, see the Cisco IOS
	Router(config-vlan)#			parameters that can be set, see the Cisco IOS
				Switching Services Command Reference.
Step 3
Step 3	exit			Updates the VLAN database, propagates it throughout
				the administrative domain, and returns to global
	Example:			configuration mode.
	Router(config-vlan)#exit
	Router(config)#

Verify Your VLAN Configuration

Use the following commands to view your VLAN configuration.

•show—Entered from VLAN database mode. Displays summary configuration information for all configured VLANs.

•show vlan-switch—Entered from privileged EXEC mode. Displays detailed configuration information for all configured VLANs.

Router# vlan database

Router(vlan)# show

VLAN ISL Id: 1

Name: default

Media Type: Ethernet

VLAN 802.10 Id: 100001

State: Operational

MTU: 1500

Translational Bridged VLAN: 1002

Translational Bridged VLAN: 1003

VLAN ISL Id: 1002

Name: fddi-default

Media Type: FDDI

VLAN 802.10 Id: 101002

State: Operational

MTU: 1500

Bridge Type: SRB

Book Title

	OL-xxxxx-xx	5-5

Image 67

Cisco Systems OL-6426-02 manual Configure VLANs, Verify Your Vlan Configuration, Vlan ?, Example

Contents

Cisco Systems, Inc Page N T E N T S Configuring Your Router for Ethernet and DSL Access 802.1x Authentication Configure the IPSec Crypto Method and Parameters Configuring Backup Interfaces Chap Configuration Register C-6 OL-6426-02 Audience Preface Chapter Title Description OrganizationVPN Boldface Command ConventionsConventions Convention Description Obtaining Documentation Related DocumentsCisco.com Ordering Documentation Documentation FeedbackCisco Product Security Overview Documentation DVD An emergency, you can also reach Psirt by telephone 877 408 Reporting Security Problems in Cisco ProductsObtaining Technical Assistance Cisco Technical Support Website Definitions of Service Request Severity Submitting a Service Request Obtaining Additional Publications and Information Getting Started Page Interface Port Labels Basic Router ConfigurationRouter Interface Port Label USB Modem Viewing the Default ConfigurationADSLoISDN ATM WAN Shdsl Example 1-1 Cisco 1812 Default Configuration on Startup Information Needed for Configuration To configure the router, perform one or more of these tasks Configuring Basic Parameters Example Configure Global ParametersConfigure Fast Ethernet LAN Interfaces Command Purpose Configure the Fast Ethernet WAN Interface Configure WAN Interfaces No shutdown Configure the ATM WAN InterfaceMode atm Exit Controller dsl Configuring a Loopback Interface Configure the Wireless InterfaceConfiguration Example Line aux console tty vty line-number Configuring Command-Line Access to the RouterVerifying Your Configuration Password password Exec-timeout minutes seconds LoginEnd Parameters that can be set, see the Cisco IOS IP Configuring Static RoutesExits router configuration mode, and enters Privileged Exec mode Configuration Example Configuring Dynamic RoutesVerifying Your Configuration Version 1 Configuring RIPCommand Task Router rip Number identifies the route to other Eigrp routers Configuring Enhanced IgrpEnters router configuration mode, and enables Eigrp on the router. The autonomous-system Routerconfig# network Be applied, using the IP address of the networkSpecifies a list of networks on which Eigrp is to Configuring Your Router for Ethernet and DSL Access Page For Ethernet-Based Network Deployments Sample Network DeploymentsFor DSL-Based Network Deployments OL-6426-02 Configuring PPP over Ethernet with NAT PPPoE Configuration TasksCommand or Action Purpose Vpdn enable Protocol l2f l2tp pppoe any Configure the Fast Ethernet WAN InterfacesRequest-dialin Initiate to ip ip-address Enables the Fast Ethernet interface Cisco 1800 integrated services routers haveThese steps to configure one or both of them Configures the PPPoE client and specifies Configure the Dialer Interface Your router Using a dialer group controls access toExits the dialer 0 interface configuration Assigns the dialer interface to a dialer group Configure Network Address Translation Ip nat inside outside Access-list access-list-number deny permitSource source-wildcard Configuration Example Router# show ip nat statistics PPP over ATM with NAT Configuring PPP over ATM with NAT PPPoA Interface is obtained through PPP/IPCP IP Sets the PPP authentication methodAuthentication Protocol Chap Specifies that the IP address for the dialer Command Reference, Volume 1 of 4 Routing Configure the ATM WAN Interface Configuring Adsl Configure DSL Signaling ProtocolAttribute Description Default Value Verify the Configuration Configuring ShdslDsl lom integer Dsl enable-training-log Wire Line-mode 4-wire enhanced 4-wire standardIgnore-error-duration number Configure Network Address Translation For NAT Enables the configuration changes just made toAbout enabling static translation, see the Cisco FE2-FE9 reside to be the inside interface Identifies the specified WAN interface as the NAT Static translation, see the Cisco IOS IP CommandExits configuration mode for the ATM interface Defines a standard access list permitting addresses ATM0 Vlan Configuring a LAN with Dhcp and VLANsVLANs Configure Dhcp Domain-name domain Default-router address address2 ...address8Import all Dns-server address address2 ...address8 Router# show ip dhcp import Verify Your Dhcp ConfigurationIp dhcp pool Example Configure VLANsVerify Your Vlan Configuration Vlan ? Vlan Router# show vlan-switch Switch Port Configurations Vlan Trunking Protocol VTP 802.1x Authentication Layer 2 Interfaces Maximum Switched Virtual Interfaces SVIsSwitched Port Analyzer Span IP Multicast Switching Igmp Snooping Per-Port Storm ControlFallback Bridging Separate Voice and Data Subnets Internet Configuring a VPN Using Easy VPN and an IPSec Tunnel Cisco Easy VPN Configure the IKE Policy Key name Configure Group Policy InformationCrypto isakmp client configuration group Group-name default Ip local pool default poolname Apply Mode Configuration to the Crypto Map Configure IPSec Transforms and Protocols Enable Policy Lookup Configure the IPSec Crypto Method and Parameters Dynamic dynamic-map-name discover Apply the Crypto Map to the Physical InterfaceReverse-route Crypto map map-name seq-num ipsec-isakmp Crypto map map-name Create an Easy VPN Remote Configuration Crypto ipsec client ezvpn name outside inside Verifying Your Easy VPN Configuration Crypto ipsec client ezvpn ezvpnclient connect auto Beta Draft Cisco Confidential Site-to-Site VPN Using an IPSec Tunnel and GRE VPNs GRE Tunnels Example uses 168-bit Data Encryption Configure a VPNConfigure the IKE Policy Also enters Internet Security Association Key Group 1 2 Configure Group Policy InformationLifetime seconds Specifies group domain membership Enable Policy LookupExits IKE group policy configuration mode, Enters global configuration mode Negotiating IPSec security associations Configure IPSec Transforms and ProtocolsMethod used to do so Specifies global lifetime values used when Map entry Configure the IPSec Crypto Method and ParametersCreates a dynamic crypto map entry, and enters Creates source proxy information for the crypto Applies the crypto map to the interface Configure a GRE TunnelApply the Crypto Map to the Physical Interface Map Access-list-name ACL that is used by the crypto map Tunnel interface must be configured toExits interface configuration mode, and returns to Enters ACL configuration mode for the named Configuration Example Ip nat outside no cdp enable Beta Draft Cisco Confidential Router with Firewall Configured Configuring a Simple Firewall Unprotected network Series integrated services router, respectivelyFast Ethernet LAN interface the inside interface for NAT Protected network Details about this command Configure Access ListsConfigure Inspection Rules Creates an access list which prevents Internet Assigns the set of firewall inspection rules to Apply Access Lists and Inspection Rules to InterfacesInside interface on the router Configuring a Simple Firewall Configuration Example Beta Draft Cisco Confidential 1shows a wireless network deployment Configuring a Wireless LAN Connection Configuring a Wireless LAN Connection Configure the Root Radio Station Interface configuration mode for the wireless Sets the permitted authentication methods for aUser attempting access to the wireless LAN Exits Ssid configuration mode, and enters Bridge-group number Configure Bridging on VLANsStation-role repeater root Bridge number crb irb mac-address-table Enables Ieee 802.1q encapsulation on Configure Radio Station SubinterfacesSpecified subinterface Assigns a bridge group to the subinterface Exits subinterface configuration mode, No bridge-group 3 unicast-flooding Interface Vlan1 Router# show running-config Sample Configuration10-1 Ip dhcp pool vlan3 10-2 10-3 10-4 10-5 10-6 11-1 Additional Configuration Options 11-2 Configuring Additional Features and Troubleshooting Page Authentication, Authorization, and Accounting Configuring Security Features12-1 ACL Type Configuring AutoSecureConfiguring Access Lists Configuration Commands Ip access-group number name in out Configuring a Cbac FirewallAccess Groups Guidelines for Creating Access Groups Configuring VPNs Configuring Cisco IOS Firewall IDS12-4 13-1 Configuring Dial Backup and Remote ManagementDial Backup Feature Activation Methods Backup Interfaces Floating Static Routes Configuring Backup Interfaces13-2 Enables RIP routing Configuring Floating Static Routes13-3 13-4 Configuring Dialer WatchDialer Watch Specifies the group number for the watch list Dial Backup Type Possible? Dial Backup Method Limitations Dial Backup Feature Limitations13-5 13-6 13-7 13-8 Example 13-3 Configuring Dial Backup Using Dialer Watch 13-9 Configure Isdn Settings 13-10 Dialer-group group-number Access-groupIp address negotiated Dialer pool number For your Cisco router during the ATM network downtime Configure the Aggregator and Isdn Peer Router13-12 13-13 Asynchronous Interface Configuration 13-14 13-15 Line Configuration 13-16 14-1 TroubleshootingGetting Started Before Contacting Cisco or Your Reseller 14-2 Adsl TroubleshootingShdsl Troubleshooting PortFast Troubleshooting 14-3 ATM Troubleshooting CommandsPing atm interface Command Show interface Command Output Cause Shutdown command14-4 14-5 Show atm interface CommandRouter# show atm interface atm Field Description Debug atm CommandsGuidelines for Using Debug Commands Debug atm errors Command Router# debug atm events Router# Debug atm events CommandRouter# debug atm errors ATM errors debugging is on Router# 14-7 Example 14-7shows a sample output Debug atm packet CommandWhere the keywords are defined as follows Optional ATM interface or subinterface number 14-9 Software Upgrade MethodsRecovering a Lost Password ATM0 14-10 Change the Configuration RegisterRouter# show version Prompt changes to the privileged Exec prompt Reset the RouterRouter# show startup-config Press Return. The following prompt appears Reset the Configuration Register Value Reset the Password and Save Your Changes14-12 14-13 Managing Your Router with SDM 14-14 Reference Information Page PC Operating System Software Configuring the Router from a PCOne of the configuration topic chapters in this guide Cisco IOS Software Basic Skills Understanding Command Modes As interface atm ExecCtrl-Z Router rip, from Configuration mode Routing protocol AppropriateGetting Help Router Enter one of the router Entering Global Configuration Mode Enable Secret Passwords and Enable PasswordsYou can now make changes to your router configuration Command-Line Error Messages Using CommandsAbbreviating Commands Undoing Commands Where to Go Next Saving Configuration ChangesSummary OL-6426-02 Adsl Concepts Routing Protocol Options Network Protocols RIP PPP Authentication ProtocolsProtocol Ideal Topology Metric Routing Updates Enhanced Igrp PAP Ethernet Network Interfaces Backup Interface Dial BackupDialer Interface NAT Easy IP Phase IP Precedence QoSPPP Fragmentation and Interleaving Low Latency Queuing Cbwfq Access Lists OL-6426-02 ROM Monitor EnableConfig-reg Resets the configuration register Descriptions section in this appendix ROM Monitor CommandsExits global configuration mode Reload Command Description Command DescriptionsDisaster Recovery with Tftp Download Tftp Download Command Variables Required Variables Variable CommandOptional Variables Retrytimes Using the Tftp Download CommandTFTPTIMEOUT= time TFTPCHECKSUM= setting Rommon 1 confreg Configuration RegisterChanging the Configuration Register Manually Changing the Configuration Register Using Prompts Console Download Command Description Frame-Displays an individual stack frame Debug CommandsError Reporting Context-Displays processor context for example Exiting the ROM Monitor OL-6426-02 Port Keyword Description Common Port Assignments Finger NETBIOS-NSNETBIOS-DGM NETBIOS-SSN IN-1 See ARPSee AAL See ATM See CAR See ChapIN-2 IN-3 Dhcp GRE Experience, user Extended access list Overview B-11See also examples Ethernet B-5 Events, ATM, displaying See NCP See LCPIN-5 See Ipcp See PAPSee PVC See PPP See NAT See RIPIN-7 See UDP Upgrading software, methods for 14-9User Datagram ProtocolIN-8