Creating a VLAN for Cisco Networking

When working with your Cisco network, you may want to separate users into different broadcast domains for security or traffic reduction. You can do this by implementing VLANs. The following example will create VLAN (VLAN2) and place the ports on a switch (from 1-12) into VLAN2.

Switch1>enable
Switch1#configure terminal
Switch1(config)#interface vlan 2
Switch1(config-if)#description Finance VLAN
Switch1(config-if)#exit
Switch1(config)#interface range FastEthernet 0/1 , FastEthernet 0/12
Switch1(config-if-range)#switchport mode access
Switch1(config-if-range)#switchport access vlan 2

If you are connecting two switches together, then you will want to allow all configured VLANs to pass between the two switches. This is accomplished by implementing a trunk port. To configure port 24 on your switch to be a trunk port, you will use the following code:

Switch1>enable
Switch1#configure terminal
Switch1(config)#interface FastEthernet 0/24
Switch1(config-if-range)#switchport mode trunk

Comments

Duplicate IP Address has been Detected Rule

A duplicate IP address has been detected on the network Rule Knowledgebase Summary This rule generates an alert when Windows® detects that he local machine’s IP address is in conflict with one or more identical IP addresses on the network. Until the IP address conflict is resolved, remote clients and applications may have difficulty accessing resources on any of the effected computers. Additionally, the local computer may not be able to access network resources. Related Events This rule generates an alert whenever the following events occur and are recorded in the System Event Log: The system detected an address conflict for IP address %2 with the system having network hardware address %3. The local interface has been disabled. Source: TCPIP; Event ID: 4198; The system detected an address conflict for IP address %2 with the system having network hardware address %3. The local interface has been disabled. Source: TCP...

Schedule Automatic backup config in Cisco Nexus

Schedule Automatic backup config in Cisco Nexus Nexus-Sw1(config)#feature scheduler //Enable scheduler service in Nexus Nexus-Sw1(config)#scheduler job name backup-daily // Job Name Nexus-Sw1(config)#scheduler aaa-authentication username abcd password abcd@123 // AAA - Authentication for Job created above (If AAA configured) Nexus-Sw1(config)#scheduler job name backup-daily copy running-config tftp://192.168.1.23/$(SWITCHNAME)-cfg.$(TIMESTAMP) //IP of TFTP SERVER , file will saved with switch name and timestamp exit Nexus-Sw1(config)#scheduler schedule name backup-daily // Setup Schedule to run for the JOB Nexus-Sw1(config-schedule)# time ? daily Specify a daily schedule monthly Specify a monthly schedule start Specify a future time schedule weekly Specify a weekly schedule...

How to enable SSH login access to a Cisco router

This guide walks you through how to setup SSH on a Cisco Router. SSH is by far more secure then telnet. Telnet allows your passwords to be sent in plain text that anyone can see and gain access to your network. SSH is all encrypted traffic. NOTE: This should work with any Cisco router provided the Cisco IOS on the router supports ssh. Firstly is ssh enabled? router#sh ip ssh SSH Disabled - version 2.0 %Please create RSA keys to enable SSH. Authentication timeout: 60 secs; Authentication retries: 5 In this case its not, if you got a error saying that sh ip ssh is not recognized then you would know that ssh is not supported or possibly that the command is different for your platform. How to enable SSH on a Cisco 800 series router# config term router(config)#crypto key generate rsa usage-keys label router-key The name for the keys will be: router-key Choose the size of the key modulus in the range of 360 to 2048 for your ...

Crazy IT Professionals

Search This Blog