Configuration guides for IT Administrators
Cisco Switch
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Why VLAN line protocol is down?
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Read More →: Why VLAN line protocol is down?On Cisco switches, after creating a new VLAN, we have noticed that VLAN interface is up however protocol doesn’t come up. MTSTJCORESW#sh int vlan 10 Vlan10 is up, line protocol is down Hardware is Ethernet SVI, address is 00fe.a5c8.c9ce (bia 00fe.a5c8.c9ce) Internet address is 10.10.10.1/24 MTU 1500 bytes, BW 1000000 Kbit/sec, DLY 10 usec, reliability…
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How to block specific MAC address in Cisco Switch
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Read More →: How to block specific MAC address in Cisco Switch(config)# mac address-table static 0349.1245.95ca vlan 192 drop just repeat with as many VLANs that you wanted to deny access for the specific MAC address
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EtherChannel Configuration
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Read More →: EtherChannel ConfigurationAbout EtherChannel: You can configure maximum 8 ports in single port-channel. All ports in the port-channel should be of same type (Fast Ethernet or Gigabit Ethernet), same speed, same duplex settings schweizer-apotheke.de. In addition, incase of trunk port-channel, same VLANs and native VLAN should be permitted. It is advisable to configure switchports on the port-channel interface rather than…
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Add new Switch to Cisco Stack Switch
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Read More →: Add new Switch to Cisco Stack SwitchPrerequisite for adding new Switch to existing Stack: Upgrade IOS to match the stack switch version Make sure the licenses or feature sets are similar (for example IP Base) Configuration Steps: In the New Switch 1.By default, switches are numbered as 1. Renumber it to 3 if you are adding the 3rd switch switch#…
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Configure Cisco Stack Switches
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Read More →: Configure Cisco Stack SwitchesAbout switch stack: Maximum 9 switches can be connected in a single switch stack. Among the multiple switches connected in switch stack, one of the catalyst switch controls the operation of entire stack and is called Switch Stack Master. All others are Stack Members. Single IP address is assigned to the entire switch stack (not…
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Configure DHCP Server on a Cisco switch or router
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Read More →: Configure DHCP Server on a Cisco switch or routerConfigure Layer3 address on a switch interface that correlates with DHCP address scope. (config) # interface vlan 5 (config-vlan)# ip address 192.168.5.1 255.255.255.0 (config-vlan)# no shut (config)#ip dhcp pool users (config-dhcp)#network 192.168.5.0 255.255.255.0 (config-dhcp)#default-router 192.168.5.1 (config-dhcp)#dns-server 192.168.5.10 192.168.5.11 (config-dhcp)#domain-name itadminguide.com (config-dhcp)#lease 8 (config-dhcp)#ip dhcp excluded-address 192.168.5.1 192.168.5.100 By default network and broadcast addresses for the…
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Know about Cisco Switch and Router
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Read More →: Know about Cisco Switch and RouterDifference between enable secret password and enable password? enable secret password encrypts the password automatically using MD5 hash algorithm. enable password doesn’t encrypt the password thus stores in clear text. But using service password-encryption command at global config mode encyrpts ‘all’ the passwords in the Cisco IOS. However enable secret password provides stronger encryption than the service password-encryption command.…
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Configure SSH in Cisco Switch
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Read More →: Configure SSH in Cisco SwitchStep 1: Setup hostname, domain-name and Management IP address (config)# hostname corp-sw-01 (config)# ip domain-name itadminguide.com (config)# interface vlan 101 (config-if)# ip address 172.20.101.1 255.255.255.0 Step 2: Generate RSA key (config)# crypto key generate RSA The name for the keys will be: corp-sw-01.itadminguide.com Choose the size of the key modulus in the range of 360 to…
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