Category: Cisco

Cisco Unified Computing System – Diagnostics for the Unified Computing System (UCS)

The following is a step by step guide running the Cisco Unified Computing System blade diagnostic utility. Mount the ucs-blade-server-diags.1.0.1b.iso which may be found here. On the Unified Computing System Blade Server Diagnostics homepage select Offline Diagnostics (GUI). On the UCS Blade Diagnostics v1.0(1b) page select < Accept  >. On the UCS Blade Diagnostics UCS B200 M3…


Cisco – Delete All VLANs

You may use the following global configuration command to remove VLANs 2-1001 on a Cisco switch. This range is chosen because VLANS 1, 1002, 1003, 1004 and 1005 cannot be removed from a Cisco switch. This command may be used when a switch’s configuration needs to be deleted, in addition to erase startup-config, for a…


Cisco – Port Security

You may use the following method to configure port security on a Cisco switch. Additionally, this configuration will not use the switchport port-security violation {protect | restrict | shutdown} command in order to accept the default action of shutdown. 1. Verify the existing configuration, if any, exists on the switch port.     2. Navigate…


Cisco – Configure Cisco Catalyst 3560 VLANs

You may use the following method to configure Virtual LANs (VLANs) on a Cisco Catalyst 3560 switch. VLANs allow you to segment a layer 2 switched network by increasing the number of layer 2 broadcast domains and decreasing their size. Additionally, VLANs provide an added measure of network security. Begin by entering global configuration mode…


Cisco – Configure Cisco Catalyst 3560 Switch Trunk

You may use the following method to configure a Cisco Catalyst3560 switch port as a trunk. In this example we will use the FastEthernet 0/24 port. Begin by entering global configuration mode and specifying the port, FastEthernet 0/24, that will be configured as a trunk port. Next, we must specify the version of trunking we…


Cisco – OSPF Routing Protocol Configuration

Open Shortest Path First (OSPF) is an open standard routing protocol that may be implemented on routers from multiple vendors. In this example the OSPF routing protocol will be implemented on two (2) Cisco routers. First, I will issue the show ip protocols command to verify there is no existing routing protocol running on the…


Cisco – EIGRP Routing Protocol Configuration

You may use the following method to configure Enhanced Interior Gateway Routing Protocol (EIGRP) on your Cisco router(s). Begin by entering privileged exec mode on your Cisco router by using the enable command. Enter global configure mode by using the command configure terminal. Type the command router eigrp [as] where [as] is the autonomous system…


Cisco – Initial Router Configuration

You may use the following commands to configure a Cisco router out-of-box. The diagram below will provide you with a visual of the network topology. There are two (2) routers in this configuration utilizing the Internet Protocol (IP) addresses 172.16.25.1/30 and 172.16.25.2/30. I chose a subnet mask of 255.255.255.252 (/30) for the Wide Area Network…


Cisco – Configuring Cisco WRVS4400N Router

At my current employer we recently had a Cisco Small Business WRVS4400N Wireless-N gigabit security router with VPN reach the end of it’s life. I replaced the wireless access point and configured it using the documentation I created in the past. Below you will find a basic step by step guide for configuring the device…


Cisco – Building a Host Table on a Router or Switch

In this example there is a router with a hostname of “router-2″ that has a serial interface configured with the Internet Protocol (IP) address of 172.16.4.2. Without an entry in the host table of the router or a Domain Name System (DNS) server I cannot use the hostname of the router in order to ping…