Ping Multiple Addresses Using TCL Script Part 1

There might be situation where you might need to ping multiple IP addresses to check the full connectivity between devices.

This tutorial shows you exactly how to do that using TCL script.
I’ll be explaining how it works in details so you don’t need to have any programming or scripting experience.
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Lookeen Backup Manager for Microsoft Office Outlook

Download Free Trial of Lookeen Backup Manager

Lookeen Backup Manager

With Lookeen Backup Manager©, created by Axonic, it is possible to create backups for Emails, contacts, calendar entries, and even the settings and options in Microsoft® Office Outlook. The full version has been available since March 2011 in the company’s online shop.

Outlook in your daily work – impossible to do without
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Enable Telnet Access on Cisco Router

This short tutorial shows how to enable telnet access on the router.


Use the following commands to enable telnet access to the router.

First check how many virtual terminal router supports.
(Depending on the router model, the output might be different)

Router#configure terminal
Enter configuration commands, one per line.  End with CNTL/Z.
Router(config)#line vty 0 ?
  <1-4>  Last Line number

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Cisco ūmi Home Telepresence on Your TV Set

Cisco announced Umi, a video conferencing appliance for typical consumers.

Umi consists of camera mounted to the top of the screen which can capture Full HD 1080p video at 30 frames per second. The camera is connected to a device which act as a internet gateway for the TV.

Umi which is scheduled to be available by November and is expected to cost around $599 with $24.99 monthly service charge for unlimited video calling.
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Configuring Port Aggregation with EtherChannel

What is EtherChannel?

EtherChannel is a link aggregation technology used primarily on Cisco switches. It can bundle two to eight physical port of the same Ethernet media type and speed. All bundled ports must have similar configuration.
EtherChannel can be used to increase bandwidth, provide redundancy and load balance traffic

EtherChannel Negotiation Protocols

Cisco supports two EtherChannel negotiation protocols. They are used to provide automatic EtherChannel configuration and negotiation between switches.

  1. Port Aggregation Protocol (PAgP) – Cisco proprietary negotiation protocol
  2. Link Aggregation Control Protocol (LACP) – standard based alternative to PagP defined in IEEE 802.3ad

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Configuring VLAN Access Control Lists (VACL)

What is VLAN Access Control Lists (VACL) used for?

VLAN Access Control Lists (VACL) can be used to filter traffic within the same vlan


Suppose a host is connected to VLAN 2 and we are required to drop all telnet traffic within VLAN 2.
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