Finally, the boot loader locates and loads a default IOS operating system software image into memory and hands control of the switch over to the IOS. Next, the switch loads the boot loader software. First, the switch loads a power-on self-test (POST) program stored in ROM. If the LED is amber, the port is blocked to ensure a loop does not exist in the forwarding domain and is not forwarding data (typically, ports will remain in this state for the first 30 seconds after being activated). Managed switches give you greater security and more features and flexibility because you can configure them to custom-fit your network. In Figure 2-4, the switch virtual interface (SVI) on S1 should be assigned an IP address. When selected, the port LEDs will display colors with different meanings. After already performing basic network switch configurations, it’s time to generate RSA keys to be used during the SSH process, using the crypto commands shown here: Choose the size of the key modulus in the range of 360 to 2048 for your General Purpose Keys. Instructions to Set Up LAN Network. Most switches offer two primary means of sending this data to a central repository: logging events via syslog and trap events via SNMP ((Simple Network Management Protocol). Or, if you are using a spare, check the device hardware and its connected cables for any damages. For instance, sorting user computers by departments or positions (accounting, sales, logistics, etc.). Specify the port to use: interface Configure the port as a Layer 2 trunk: switchport mode {dynamic {auto | desirable} | trunk} These options mean: dynamic auto – The Default. For security purposes, it is considered a best practice to use a VLAN other than VLAN 1 for the management VLAN. Save the running config to the startup config. Because you don’t have to be near the Switch all the time. To configure a trunk port on a Cisco 2960 switch: Enter configuration mode: configure terminal. Next, make sure your switch has a set hostname and domain name: Hit the show vtp status command to reveal your Virtual Trunking Protocol (VTP) revision numbers. VLANs are numbered logical groups to which physical ports can be assigned. Type " enable " next to it and press "Enter". Continue pressing the Mode button until the System LED turns briefly amber and then solid green; then release the Mode button. If the LED is green, the RPS is connected and ready to provide backup power. Cisco Catalyst switches have several status LED indicator lights. SVI is a concept related to VLANs. You can use any open port on the switch to make the connection. Step 4. The SVI is a virtual interface, not a physical port on the switch. Next, use a rollover cable to console into the switch from your computer. As shown in Figure 2-6, the show ip interface brief command is useful when determining the status of both physical and virtual interfaces. After that, connect one end of an Ethernet cable to the Ethernet port on the back of the modem. Hook the Wi-Fi router up to the network via one of the LAN ports (later you can switch the cable to the WAN port). To begin configuring the switch, first plug a desktop or laptop computer into any port in the switch. Configure a network adapter on the PC to be on the 192.168.0.x subnet. Step 2. To prepare a switch for remote management access, the switch must be configured with an IP address and a subnet mask. Indicates the port duplex mode is selected when the LED is green. Check the model number of your shiny new switch. When you set a VTP domain name, the revision number is set to zero—after which each change to the VLAN database increases the revision number by one. In this example, VLAN 99 is configured with the IP address and mask of 172.17.99.11. And this process is a little more advanced than, say, setting up your home Internet or even a plug-and-play type switch. S1(config-if)# ip address 172.17.99.11 255.255.0.0. If ISL is supported, you have to issue the switchport trunk encapsulation dot1q on the trunk port configuration. Step 2: Set up management IP. In a depth-first search of a directory, each encountered subdirectory is completely searched before continuing the search in the original directory. Figure 2-1 Configure BOOT Environment Variable. Access the command prompt of the switch and run the following commands. VLAN is a function that allows dividing a physical network into several virtual subnets, so that one subnet will correspond to a definite VLAN. Configuring them can be fun and challenging. > The boot loader command line supports commands to format the flash file system, reinstall the operating system software, and recover from a lost or forgotten password. The no shutdown command enables the interface. Keep in mind that to manage the switch from a remote network, the switch must be configured with a default gateway. If PoE is supported, a PoE mode LED will be present. To prepare a switch for remote management access, the switch must be configured with an IP address and a subnet mask. It tests the CPU, DRAM, and the portion of the flash device that makes up the flash file system. If the LED is blinking amber, the port is blocked to prevent a possible loop in the forwarding domain. If you have not set the console line yet, you can easily input these values: Set the enable password using the enable secret password command. In Figure 2-1, the BOOT environment variable is set using the boot system global configuration mode command. This is very similar to configuring the IP address information on host devices. Configure the Management Interface. Just like riding a bicycle, nobody's born knowing how to setup a network switch. Figure 2-4 Preparing for Remote Switch Management. Configuring DHCP service on the switch. On Catalyst 2960 Series switches, the image file is normally contained in a directory that has the same name as the image file (excluding the .bin file extension). S1(config)# ip default-gateway 172.17.99.1. Open the putty and you can try the following basic configurations for console connection to your Switch. Configure your switch: Connect a computer to the switch using the IP address found in the switch manual. On the physical layer, the network remains untouched, meaning that several VLANs go through the sam… There you'll find answers to common questions and connect with people running similar businesses and facing similar IT challenges. Plug the AC power adapter for the switch into a wall outlet, but do not yet connect it to the modem or any of your home computers. Verify SSH access by typing ‘sh ip ssh’ to confirm that the SSH is enabled. Enter interface configuration mode for the SVI. assign an IP address with the ip address IP_ADDRESS SUBNET_MASK interface subcommand. To start using your Smart Switch for the first time: Install the Smart Control Center Utility on a computer with a network card. So, before you add your switch to the network, you’re going to want to set its revision number to zero. Step 1. Learn how to make the right decisions for designing and maintaining your network so it can help your business thrive. If the LED is off, the port is operating at 10 Mb/s. Hence, networks with different VLAN will not be visible to each other. If the LED is green, the system is operating normally. A Cisco switch is a central component of your network. Configuration of both is simple, usually varying minimally from switch to switch and even from brand to brand. The main function of managed switches is, obviously, dividing a core network into smaller subnets. As your virtual training wheels, we've broken down the task into its simplest parts so you can successfully create client VLANS, build DHCP systems, and assign access ports without skinning your knees. Set up the IP address for the switch, network address and netmask. 1. Our resources are here to help you understand the security landscape and choose technologies to help safeguard your business. General Networking Once that’s done, label your switch, rack it up, and go enjoy doing anything that doesn’t involve switch configuration! How to configure SSH (Secure Shell) in Cisco Router or Switch for secure remote access. The IOS operating system then initializes the interfaces using the Cisco IOS commands found in the configuration file, startup configuration, which is stored in NVRAM. But, with the right guidance, a can-do attitude, and a dash of bravery, even newbie IT professionals can integrate a new Cisco switch into their business environment. If the LED is alternating green-amber, there is a link fault. Small Business Solutions - IT Products and Services, (config)# IP address 192.168.101.1 255.255.255.0, Switch01(config)# crypto key generate rsa, % Generating 1024 bit RSA keys, keys will be non-exportable...[OK]. After a Cisco switch is powered on, it goes through the following boot sequence: Step 1. If the LED is off, the RPS is off or not properly connected. You will get the initial command prompt “ Switch> ” Type “ enable ” and hit enter. Articles Cisco Networking Academy's Introduction to Basic Switching Concepts and Configuration, Routing and Switching Essentials Companion Guide. Step 3. It means there is no other encapsulation supported so there is no need for an encapsulation command. Cisco Network Technology Create Network. Router1> enable Router1# configure terminal Router1 (config)# interface FastEthernet0/0 Router1 (config-if)# ip dhcp Initial command prompt " Switch> " appears on the screen. Click Switch1 and click CLI menu item and press Enter Key Navigating between different switch command modes Cisco switches run on proprietary OS known as Cisco IOS. This article describes setup and configuration best practices for the management and monitoring of Cisco Nexus 50x0 switches deployed as NetApp cluster network switches. Be it network reorganization or brand new installation, it’s important to configure the switch properly. Fun-Named software tool ) time, we usually connect and configure a computer to the.... 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