Note Although TACACS+ configuration is performed through the CLI, the TACACS+ server authenticates HTTP connections that have been configured with a privilege level of 15. Each accounting record contains accounting attribute-value (AV) pairs and is stored on the security server. In the Details section, enter a domain name that the software uses to After finishing the download, run the software and wait for the following screen. The new configuration register value takes effect with the next system boot up. For example, in Figure 3-2, configure the router interfaces as follows: Figure 3-2 Relay Device Used in Autoconfiguration. This value is a combination of the following: binary bit 13, bit 8 = 0x0100 and binary bits 00 through 03 = 0x0001. The TFTP server contains the configuration files for the switch. If you do not configure the DHCP server, or the DHCP server feature running on your switch, with the lease options described earlier, the switch replies to client requests with only those parameters that are configured. The switch can act as both a DHCP client and a DHCP server. The user enters a username, and the switch then contacts the TACACS+ daemon to obtain a password prompt. To recover a lost enable password, follow these steps: Step 2 Stop the boot sequence and enter ROM monitor by pressing Ctrl-C during the first 5 seconds of bootup. If the configuration parameters sent to the client in the DHCPOFFER unicast message are invalid (if configuration error exists), the client returns a DHCPDECLINE broadcast message to the DHCP server. pass through the network. In images prior to Release 12.2(20)EW, this command does not enable autoconfiguration. Table 3-3 Software Configuration Register Bits, Causes system software to ignore NVRAM contents, Bits one and zero of Console line speed (default is 9600 baud), IP broadcasts do not have network numbers. You must configure the TFTP server name-to-IP address map on the DNS server. This section contains the following configuration information: TACACS+ is a security application that provides centralized validation of users attempting to gain access to your switch. Refer to the "Specify the Startup System Image in the Configuration File" section in the "Loading and Maintaining System Images and Microcode" chapter of the Configuration Fundamentals Configuration Guide for details on setting the BOOT environment variable. Unavailability of other lease options does not impact autoconfiguration. As a Network Engineer you are tasked to install a new switch, create the client VLANs, have Systems build DHCP, assign the access ports and test the machines before going live. 3. Single Distribution Switch (Single Downlink), Single Distribution Switch (Single Port Channel Downlink), Redundant Distribution Switch (Port Channel Peer and Downlink), Selected uplink ports connect to other distribution or core switches, Downlink connections to access switches configured in Trunk mode, Port-channel to core or distribution created, Standalone Collapsed Core Switch (with ECMP Peer and Port Channel Downlink), Selected uplink ports connect to MAN/WAN device, Downlink connections to distribution switches, Selected ports connect to other core switches. System Preferences >Network >Advanced >TCP >DHCP Client ID: To automatically configure your device based on a site profile, click, Default Configuration Loaded with Each Site Profile (Access Switches), Default Configuration Loaded with Each Site Profile (Distribution Switches), Default Configuration Loaded with Each Site Profile (Core Switches), VLAN monitor, and troubleshoot the device without having CLI expertise. For information on how to display the password or access level configuration, see the "Displaying the Password, Access Level, and Privilege Level Configuration" section. Steps to configure Cisco switch using CLI Step 1: Use an external emulator such as Telnet or a PuTTY to login to the switch. Learn how to configure and manage a Cisco Switch with the basic CLI switch commands and configuration steps. PDF - Complete Book (15.12 MB) PDF - This Chapter (1.34 MB) View with Adobe Reader on a variety of devices . To synchronize your device with an external timing mechanism such as a Network Time Protocol (NTP) clock source, enter As long as the switch can successfully boot from this image, the same image is used on a reboot. If the switch is configured to require authorization, authorization begins at this time. •Switch 1 reads the configuration file that corresponds to its host name; for example, it reads switch1-confg from the TFTP server. Click Day 0 Config Summary to verify your setup. First, you need to access the console of your Cisco Switch. You can use any network simulator software or can use a real Cisco switch to follow this guide. Switches 2 through 4 retrieve their configuration files and IP addresses in the same way. the 192.168.1.x/24 range. If redirection does not succeed, verify if the device is associated with a redirection controller profile on Cisco PnP Connect (devicehelper). Accounting records include user identities, start and stop times, executed commands (such as PPP), number of packets, and number of bytes. … Cisco Catalyst Blade Switch 3030 Software Configuration Guide, Rel. catalyst 2960 switch software configuration guide cisco ios release 12.2(25)see february 2006 text part number: ol-8603-01. If the IP address and subnet mask are not in the reply, the switch is not configured. your device is configured with the right time, date and timezone, enter the IP The files include the specified configuration filename (if any) and the following files: network-confg, cisconet.cfg, hostname.confg, or hostname.cfg, where hostname is the current hostname of the switch and router-confg and ciscortr.cfg. This chapter describes how to initially configure a Catalyst 4500 series switch. After authentication, the user undergoes an additional authorization phase if authorization has been enabled on the switch. •Boot capability (manual bootup and autoboot). The username password combination you set gives you privilege 15 access. To specify TACACS+ authorization for privileged EXEC access and network services, perform this task, beginning in privileged EXEC mode: Configures the switch for user TACACS+ authorization for all network-related service requests. If you chose Static, perform the following steps: Enter a VLAN ID to associate with the interface in the Associate VLAN Interface drop-down list. If you did not specify the configuration filename or the TFTP server name, or if the configuration file could not be downloaded, the switch attempts to download a configuration file using various combinations of filenames and TFTP server addresses. Figure 3-4 Typical TACACS+ Network Configuration. If you enable the service password-encryption command, the password you enter is encrypted. If connection is not established, click the Retest button. •local-case—Use a case-sensitive local username database for authentication. the next step and configure only basic settings for your device. •For list-name, specify a character string to name the list you are creating. Switch Stack Configuration Files The active switch has the saved and running configuration file for the switch stack. See the "Modifying the Boot Field and Using the boot Command" section, for more information on modifying the configuration register. When autocomplete results are available use up and down arrows to review and enter to select Book Title. Server, Introduction to Day 0 WebUI Configuration, Configuring Your Device Based on a Site Profile, Configuring VLAN Settings, Configure STP Settings, Configuring DHCP, NTP, DNS and SNMP Settings. You can configure the IP addresses of the DNS servers in the lease database of the DHCP server where the DHCP replies retrieve them. This protocol consists of two components: one component for delivering configuration parameters from a DHCP server to a device and another component that is a mechanism for allocating network addresses to devices. The switch receives its IP address, subnet mask, and the TFTP server address from either the DHCP server or the DHCP server feature running on your switch. The TFTP server addresses used include the specified TFTP server address (if any) and the broadcast address (255.255.255.255). Release Date. Release Information; Release Notes; Install and Upgrade; Installation Unlike other lower class switch vendors (which are plug-and-play), the Cisco switch needs some initial basic configuration in order to enable management, security and some other important features. To configure a switch as the root for the specified VLAN, use the spanning-tree vlan vlan-id root global configuration command to modify the switch priority from the default value (32768) to a significantly lower value. This process continues until there is successful communication with a listed method or the method list is exhausted. You need a console cable for this, you can understand the whole process with the following figure. The DHCP server sends the client a DHCPNAK denial broadcast message, which means that the offered configuration parameters have not been assigned, that an error has occurred during the negotiation of the parameters, or that the client has been slow in responding to the DHCPOFFER message. To modify the software configuration register boot field, perform this task: Determines the current configuration register setting. the WebUI using the management interface IP address. To display TACACS+ server statistics, use the show tacacs privileged EXEC command. TACACS+ provides for separate and modular AAA facilities. The default is 5 seconds. To change a Log on using the default username webui and password cisco. A method list defines the sequence and methods used to authenticate, to authorize, or to keep accounts on a user. See the "Recovering a Lost Enable Password" section for more information. If prompted by User Account Control, click Yes to open the Registry Editor. •ERROR—An error occurred at some time during authentication with the daemon or in the network connection between the daemon and the switch. You can enter the boot command only or enter the command and include additional boot instructions, such as the name of a file stored in flash memory, or a file that you specify for booting from a network server. Check the appropriate hardware installation and maintenance guide for information about types of flash memory. Network managers can use the accounting facility to track user activity for a security audit or to provide information for user billing. at the prompt or press the help key in configuration mode. In our example, we are going to use an Opensource software named Putty and a computer running Windows. To remove the specified TACACS+ server name or address, use the no tacacs-server host hostname global configuration command. You should configure the DHCP server, or the DHCP server feature running on your switch, with reserved leases that are bound to each switch by the switch hardware address. You can also enter ROMMON mode by restarting the switch and then pressing Ctrl-C during the first five seconds of startup. Depending on the NVRAM configuration, the supervisor engine either stays in ROMMON mode or loads the supervisor engine software. Enter the copy system:running-config nvram:startup-config command to save the environment variables from your running configuration to your startup configuration. To synchronize your device with a valid outside timing mechanism, such To either disable TACACS+ authentication for logins or to return to the default value, use the no login authentication {default | list-name} line configuration command. Enters configuration mode, and specify the terminal option. The following example shows a typical system configuration: Note The switch uses the default gateway only when it is not configured with a routing protocol. In the Device Management Settings section, assign an IP address to the management interface. You must enter username information in the database. Establishes a password for the privileged EXEC mode. To configure a Otherwise, continue to The string cannot start with a number, is case sensitive, and allows spaces but ignores leading spaces. To explain basic switch configuration commands, I will use packet tracer network simulator software. •If no configuration filename is given in the DHCP server reply, Switch 1 reads the network-confg file from the base directory of the TFTP server. Understanding Private VLANs Note Starting with Release 12.2(20)EW, you can enable DHCP AutoConfiguration by entering the write erase command. The information presented here supplements the administration information and procedures in this publication: Cisco IOS Configuration Fundamentals Command Reference, Release 12.2SR, at this URL:http://www.cisco.com/en/US/docs/ios/fundamentals/configuration/guide/12_4/cf_12_4_book.html. To configure Day 0 settings using the web UI, do not enter a response. The switch uses a 16-bit software configuration register, which allows you to set specific system parameters. The preferred solution is to configure either the DHCP server or the DHCP server feature running on your switch with all the required information. Note The factory default configuration register setting for systems and spares is 0x2101. From ROMMON mode, you can manually load a software image from bootflash or a flash disk, or you can boot up from the management interface. This chapter provides information about switch clusters. To disable accounting, use the no aaa accounting {network | exec} {start-stop} method1... global configuration command. The goal of TACACS+ is to provide a method for managing multiple network access points from a single management service. The prompt changes to the enable prompt (#): Step 3 At the enable prompt (#), enter the configure terminal command to enter global configuration mode: Step 4 At the global configuration mode prompt, enter the interface type slot/interface command to enter interface configuration mode: Step 5 In either of these configuration modes, enter changes to the switch configuration. The site is expanding and the ramp-up will happen within the next three days. Login to view your download history LOG IN NOW. Repeat this step for each TACACS+ server in the AAA server group. The server group is used with a global server-host list and contains the list of IP addresses of the selected server hosts. Basic Switch Configuration (2.1) Switches are one of the most numerous devices installed onto the corporate network infrastructure. See the "Recovering a Lost Enable Password" section for more information. Ensure that the IP address you assign is part of the subnet mask you enter. The ROM monitor (ROMMON) is invoked at switch bootup, reset, or when a fatal exception occurs. If the router IP address or TFTP server name (or IP address) are not found, the switch might send broadcast, instead of unicast, TFTP requests. Enter the show version EXEC command to verify the current configuration register setting. The default gateway must be the IP address of an interface on a router that is directly connected to the switch. When AAA accounting is enabled, the switch reports user activity to the TACACS+ security server in the form of accounting records. •Only the IP address is reserved for the switch and provided in the DHCP reply. Configuration Assistant 3.2(3) English Installer Login Required. Ensure that the IP address you assign is part of the subnet mask you enter. In the Knowing how switches normally boot and load an operating system is also important. The user is granted access to a requested service only if the information in the user profile allows it. Launch a web browser on the PC and enter the device IP address (https://192.168.1.1) in the address bar. You can also enforce restrictions on the commands a user can execute with the TACACS+ authorization feature. For more information, see the "Configuring the DHCP Server" section. The files can include the following: •The configuration file named in the DHCP reply (the actual switch configuration file). This chapter includes the following major sections: •Configuring DHCP-Based Autoconfiguration, •Controlling Access to Privileged EXEC Commands, •Modifying the Supervisor Engine Startup Configuration, •Resetting a Switch to Factory Default Settings, Note For complete syntax and usage information for the switch commands used in this chapter, first look at the Cisco Catalyst 4500 Series Switch Command Reference and related publications at this location:http://www.cisco.com/en/US/products//hw/switches/ps4324/index.htmlIf the command is not found in the Catalyst 4500 Series Switch Command Reference, it will be found in the larger Cisco IOS library. Details section, type the IP address of the DNS server that you •The router-confg or the ciscortr.cfg file. Connect one end of an ethernet cable to one of the downlink (non-management) ports on the active supervisor and the other complete unqualified hostnames. The DHCP server, or the DHCP server feature running on your switch, can be on the same LAN or on a different LAN than the switch. This directory contains the network-confg file used in the two-file read method. You need a system running the TACACS+ daemon software to use TACACS+ on your switch. •(Optional) For timeout integer, specify a time in seconds the switch waits for a response from the daemon before it times out and declares an error. Note the following security precaution when loading from flash memory: To configure your switch to boot from flash memory, perform the following procedure. The … Note The switch broadcasts TFTP server requests provided that one of these conditions is met: the TFTP server is not obtained from the DHCP replies; all attempts to read the configuration file through unicast transmissions fail; or the TFTP server name cannot be resolved to an IP address. Catalyst 3560 Switch Software Configuration Guide, Cisco IOS Release 15.0(2)SE and Later. You have two methods to configure the switch using the WebUI. This example shows how to check the BOOT and BOOTLDR variables on the switch: Manufacturing and repair centers can use the erase /all non-default command to do the following: •Clear the nonvolatile configurations and states of the local supervisor engine (NVRAM and flashes). If the cisconet.cfg file is read, the filename of the host is truncated to eight characters. Perform the following tasks instead: Make sure that no devices are connected to the switch. If the host name is not found in the file, the switch uses the host name in the DHCP reply. If the DHCP server is running on a different LAN, you should configure a DHCP relay, which forwards broadcast traffic between two directly connected LANs. Verify that the configurations are applied successfully, and the device is redirected to Cisco DNAC Cloud. If more than one image is specified, the switch attempts to boot the first image specified in the BOOT variable. address to identify the DNS server. Refer to the Cisco IOS Command Reference and related publications at this location:http://www.cisco.com/en/US/products/ps6350/index.html. Set a password of up to 25 alphanumeric characters. The TACACS+ authentication service can also send messages to user screens. want to make available to DHCP clients. Selected ports configured as Port-channel in trunk mode, set to allow all VLANs. For example, a message could notify users that their passwords must be changed because of the company's password aging policy. Uplink – For connecting to devices towards the core of the network. Specify the port to use: interface
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