Monthly Archives: November 2011
Cisco VLAN Trunking Protocol (VTP)
VLAN Trunking Protocol (VTP) is a Cisco proprietary protocol that reduces administration in a switched network. When you configure a new VLAN on one VTP server, the VLAN is distributed through all switches in the domain. This prevents you from … Continue reading
Posted in Cisco, Labs, Networking, Protocols, Technology
Tagged Cisco, Cisco 2960, Cisco 2960 siwtch, Client Mode, Server Mode, Transparent Mode, vlan, VLAN Trunk Protocol, VLAN Trunking Protocol, VTP, VTP client, VTP server
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Address Resolution Protocol (ARP)
Address Resolution Protocol (ARP) is used by IP devices to locate the hardware addresses of other devices on the local network. RFC 826 introduced ARP as a method for IP devices to locate other IP devices on the same local … Continue reading
Posted in Networking, Protocols, Technology
Tagged 0806, Address Resolution Protocol, ARP, ARP request, ARP response, broadcast ARP, protocol ID 0806, RFC 1122, RFC 826, unicast ARP
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Cisco – Spanning VLANs across Switches via Trunking
In this lab I use two Cisco WS-C2960-24TT [IOS 12.2(25)FX] switches to demonstrate how to span VLANs across switches via 802.1q trunking. I avoid using VTP by using “VTP transparent mode”; as a result, I have to configure the VLANs … Continue reading
Posted in Cisco, Labs, Networking, Technology
Tagged 802.1q, 802.1q encapculation, Cisco, Cisco 2960, Cisco 2960 siwtch, Cisco switch, Cisco WS-C2960-24TT, isl, isl encapsulation, trunk link, Trunking, vlan
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Setting-up Tomcat 7 on Windows 7
Apache Tomcat 7 is unique compared to prior releases as it supports the Servlet 3.0, JSP 2.2, and EL 2.2 specifications. However, make note that Tomcat 7 requires Java 1.6 or higher.
Perl – merging files
Below I demonstrate a quick method of merging two files into a third file using Perl. The program merges two files together into a third file by writing one line from file one to file three and then writing one … Continue reading
Posted in Perl, Programming Languages
Tagged combine files, file merge, merge two files, merging files, perl, perl code
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Recover from a Forgotten Console Password on Dell Force10 E-Series Switches
In this lab I will use a Dell Force10 E600i chassis [FTOS 8.3.1.1] to demonstrate how to recover if you forget your console password. The first thing to do to prepare for this lab is to log on through the … Continue reading
Posted in Dell Force10, Force10 Networks, Networking, Technology
Tagged BOOT_ADMIN mode, console password, Dell, Dell Force10, Dell Force10 E600i, E-Series, E600, E600i, enable password, Force10 Networks, forgot console password, forgot enable password, forgot password, FTOS, password recovery, Recover from a Forgotten Console Password on Dell Force10 E-Series Switches, router, set console password, switch
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Perl – Initial Values and Context Based Evaluation
It’s important to remember that in Perl all scalar variables have an initial value of the null string, “”. You do not need to define a value for scalar variables unless you are using “strict” mode. Knowing this, what do … Continue reading
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