Cisco 3750G, 3560G, 3650, And 3850 Configuration

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[3750G/3560G/3650/3850 SWITCH CONFIGURATION FOR WHEATNET-IP]1Technical DocumentCisco 3750G, 3560G, 3650, and 3850 Configuration for WheatNet-IPOverviewLet’s take a look at what needs to be done to get your Cisco Catalyst ready forthe installation of your WheatNet‑IP system. Properly configuring your switch allowsyou to take advantage of the “management” capabilities to control network trafficand allows the network to operate at its highest potential. This becomes necessaryto prevent overloading the network as the system size increases.In this setup process you will setup switch ports according to the type of device connecting to that port. You will be setting things like VLAN access, Trunking,Speed, etc. Each section below gives you the exact commands needed to get yourWheatNet‑IP network up running.Below is a chart that gives you some information about the commands you willbe u sing to complete the setup. This can be a quick reference for you as well:CommandPurposeConfigure TerminalEnter Global configuration mode on switchInterfaceEnter interface configuration modeSwitchport mode accessConfigures the port as an access portSwitchport mode TrunkConfigures port for trunking to other switchesSwitchport nonegotiatePrevents DTP frames from being generatedSpanning-tree portfastEnables portfast on the switch portShow running-configShow the current running configurationWrite memoryWrites the configuration to memory on the switchIP igmp snooping querierEnables IGMP querierIP igmp snooping querier timer expirySet the length of time until the IGMP querier expires

[3750G/3560G/3650/3850 SWITCH CONFIGURATION FOR WHEATNET-IP]2This document will explain the initial configuration of the Cisco Catalyst switch.To get started you will need the blue console cable that came with your switch. Goahead and connect the console cable to the serial port on your PC and the RJ-45 tothe console port on the switch. If your PC is not equipped with a serial port you willneed a USB to Serial converter.If you do not have the blue Cisco console cable there is an alternative. Cisco isnow shipping with a USB console port on most of the new models. You can downloadthe USB driver needed from the Cisco download site. You will need to download theCisco usbconsole driver.Next let’s get your PC ready to communicate. You will need a terminal programsuch as HyperTerminal to finish this portion of the setup. HyperTerminal is an applica‑tion you can use in order to connect your computer to other remote systems. Thesesystems include other switches, routers, other computers, and Telnet sites.HyperTerminal is located under the Start menu of your Windows 2000/XP PC. Ifyou are using Windows Vista or Windows 7 or higher, you will need to install a similarterminal program to complete the setup.To get started, open HyperTerminal and start a new connection. The terminalsession should be setup using 9600Baud, 8 bit, no Parity, and no Flow control.For those who are familiar with the Cisco IOS you may wish to jump ahead to thecommands. For the rest, keep reading and we’ll walk you through it step by step.Along the way we’ll even explain why we use the commands below so that youhave some basic understanding of what you are doing. Hopefully you will walk awaywith some new found knowledge.Privileged EXEC ModeNow that we are connected to the switch let’s log in. When logging into a Ciscoswitch under the default configuration, you are in user EXEC mode (level 1). In EXECmode, you have limited access to the status of the switch. However, you can’t makeany changes or view the running configuration file.Because of these limitations, you need to type enable to get out of user EXECmode. By default, typing enable takes you to “Privileged” EXEC mode (Level 15). Inthe Cisco IOS, this level is equivalent to having root privileges in UNIX or administratorprivileges in Windows. In other words, you have full access to the switch.

[3750G/3560G/3650/3850 SWITCH CONFIGURATION FOR WHEATNET-IP]3Let’s get started on the configuration of your switch. Type “enable” command at theprompt. When prompted, enter the password and press Enter again. If no passwordhas been defined just press Enter.NOTE: The command prompt now ends with “#” indicating you are now at the Privileged EXEC mode (Level 15).Global Configuration ModeTo enter the IP address and Subnet Mask for the VLAN or configure the switch portsyou must first enter the configuration mode. To enter the global configuration mode on theswitch type “Config T” and press Enter. This places the switch in Global configurationmode and will allow configuration from the terminal window for the selected interface.You should now have the switch (config)# prompt.Configuring the VLAN InterfaceA VLAN is a switched logical network that is segmented based on the function orapplication. VLANs are virtual LANs but have the same attributes as the physical LAN.VLANs allow a user to create a virtual broadcast domain in which traffic can be isolatedto keep it from reaching unwanted destinations. Any switch port can belong to a VLAN,and unicast, broadcast, and multicast packets are forwarded only to those end stations assigned to that VLAN.Now that you are in the Global configuration mode you need to select the interfacethat you would like to configure. We’ll start with the default VLAN.The switch will come with a default VLAN enabled. In the default configuration allports on the switch have been assigned to VLAN1. The command below selects the default VLAN for configuration to segment network traffic on the switch. If you are addingan additional VLAN to existing hardware, substitute that VLAN number in place of 1.Enter the following commands (“XXX” the actual network IP address):interface Vlan1ip address 192.168.87.XXX 255.255.255.0endLet’s look at what you just set up. By typing “interface Vlan1” you are entering theconfiguration for that VLAN. The “IP Address” command simply sets the IP address ofthe VLAN1 interface for remote management purposes. The IP address must be uniqueon the network.

[3750G/3560G/3650/3850 SWITCH CONFIGURATION FOR WHEATNET-IP]4IGMP Snooping Querier ConfigurationBy default, IGMP is enabled globally on the switch. To set up IGMP Snooping Querieron the switch you must be in the Global configuration mode. To enter the configurationmode once again type “Config T” and press Enter.Enter the following commands:ip igmp snooping querierip igmp snooping querier max-response-time 25ip igmp snooping querier timer expiry 205endBy default IGMP Snooping is globally enabled on the switch. It is enabled onVLANs by default. Global IGMP snooping takes precedent over VLAN IGMP Snooping.If globally disabled you cannot enable IGMP Snooping on a per VLAN basis.The commands above simply enable the querier on the switch and set a few valuesfor maximum response time and the expiration duration for the querier.Configuring Gigabit Ports Connecting to WheatNet‑IP I/O BLADE3s andPC DriversConfiguring the ports on the Cisco Catalyst switch is a key step in ensuring optimal performance of the WheatNet‑IP network. This section will guide you in the setup ofeach port used for Wheatnet‑IP I/O BLADE 3s.Switch ports operate in one of three modes, dynamic, trunk, or access mode.Switch ports connecting to Wheatstone IP devices must be in Access mode. Accessmode places the port in static access mode and gives it access to the default VLAN.The switchport nonegotiate command disables the Dynamic Trunking Protocoland tells the port not to generate DTP frames.To setup ports on the switch you must also be in the Global Configuration mode. Toenter the configuration mode once again type “Config T” and press Enter.Enter the following commands based on the OS versions of your switch: OS any version prior to version 15.0Interface gig 0/x (x the Ethernet port being configured)switchport mode accessswitchport nonegotiateswitchport block multicastno ip igmp snooping tcn floodspanning-tree portfastend

[3750G/3560G/3650/3850 SWITCH CONFIGURATION FOR WHEATNET-IP]5 OS any version after 15.0Interface gig 0/x (x the Ethernet port being configured)switchport mode accessswitchport nonegotiateno ip igmp snooping tcn floodspanning-tree portfastendPorts on the Catalyst switch can be configured individually or in a “Range.” If rangeis desired type Interface range gig1/0/1-24 using the desire number of ports.Configuring Gigabit Ports Connecting to WheatNet‑IP Control Surfaces,GP Panels, and XY ControllersEnter the following commands based on the OS versions of your switch: OS any version prior to version 15.0Interface gig 0/x (x the Ethernet port being configured)switchport mode accessswitchport nonegotiateswitchport block multicastno ip igmp snooping tcn floodspanning-tree portfastend OS any version after 15.0Interface gig 0/x (x the Ethernet port being configured)switchport mode accessswitchport nonegotiateno ip igmp snooping tcn floodspanning-tree portfastendPorts on the Catalyst switch can be configured individually or in a “Range.” If rangeis desired type Interface range gig0/1-24 using the desired number of ports.

[3750G/3560G/3650/3850 SWITCH CONFIGURATION FOR WHEATNET-IP]6Configuring Ports for Linking to Other Network SwitchesTrunk mode is used when connecting another switch to the port.To set a specified port to trunk mode when connecting to another network switchthe port needs to be set for Trunk mode. To setup Gigabit ports on the switch youmust also be in the Global Configuration mode. To enter the configuration mode onceagain type “Config T” and press Enter.Enter the following commands based on the OS versions of your switch: OS any version prior to version 15.0Interface gig 0/x (x the Ethernet port being configured)switchport trunk encapsulation dot1q (Only 3750 and 3560)switchport mode trunkswitchport nonegotiateswitchport block multicastno ip igmp snooping tcn floodend OS any version after 15.0Interface gig 0/x (x the Ethernet port being configured)switchport trunk encapsulation dot1q (Only 3750 and 3560)switchport mode trunkswitchport nonegotiateno ip igmp snooping tcn floodendChecking and Saving the Switch ConfigurationWhen you are done, check the switch configuration by typing the following command from the command prompt:show running-configOnce you are sure you have the correct configuration you need to save it. Youcan save the configuration by typing one of the following commands:copy running-config startup-configorwrite memory

[3750G/3560G/3650/3850 SWITCH CONFIGURATION FOR WHEATNET-IP] This document will explain the initial configuration of the Cisco Catalyst switch. To get started you will need the blue console cable that came with your switch. Go ahead and connect the console cable to the serial port on

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