GNS3 is a graphical network simulator that allows simulation of complex networks. To allow complete simulations, GNS3 is strongly linked with : * Dynamips, the core program that allows Cisco IOS emulation. * Dynagen, a text-based front-end for Dynamips. * Qemu, a generic and open source machine emulator and virtualizer. GNS3 is an excellent complementary […]
IEEE 802.3ba-100 Gbps Ethernet is Here
On June 17th, the IEEE has ratified the 802.3ba standard for Ethernet connections with speeds of 40 and 100 Gbps. Both Cisco and Juniper have been supplying high performance network equipment which support the above standard. Cisco for example supports the 100Gbps Ethernet card on its CRS-3 router, while Juniper supports its 100Gbps PIC card […]
IPv4 addresses are running out
It is beyond discussion that the full implementation of IPv6 in all Internet services and infrastructures will take place sooner or later. However, a harsh reality has knocked our door a few months ago. The Number Resource Organization (NRO) has warned that the available free IPV4 address space has fallen below 10%, which is considered […]
Routing Protocols Overview
There are different techniques and methods for maintaining accurate routing information, thus different types of routing protocols were invented over the years. The following post is intended to offer you an overview of the different types of routing protocols currently available. Distance Vector / Link State The above terms refer to the algorithms that govern […]
How Hosts Use Subnet Masks
This is a post for people new to networking that have just started learning IP addressing and the basis of routing and subnetting. Every host or device on a TCP/IP network MUST have an IP address assigned in order to communicate with other devices. An IP address consists of a network part and a host […]
Cisco Branch Virtual Office Solutions
Extending the central office enterprise environment to remote branch office locations gives employees greater flexibility while enhancing productivity and reducing costs. Cisco Virtual Office solution is an umbrella of technologies and products that delivers secure data, voice, and video communication to remote teleworkers and branch offices, providing to remote employees a seamless office-caliber experience to […]
Passing non-IP Traffic over IPSEC VPN using GRE over IPSEC
IPSEC VPN is a great technology for encrypting and securing communications between networks (used also in VPN software clients as well). The only drawback is that IPSEC supports ONLY pure IP unicast traffic and nothing else. If you want to securely pass multicast or non-IP traffic between sites then IPSEC alone will not work. Fortunately Cisco […]
Cisco Best Overall Home Network
Cisco has announced the Grand Prize winner of its competition for the best overall home network using Cisco equipment. This competition is run among Cisco employees. The winner is Iwan Eberhart, Frauenfeld, Switzerland. His Home Network is shown in the figure below: “I enjoy having the latest and greatest technologies at home, too,” he says. […]
Cisco Internet Home Network Solutions
Connecting Your Home Today’s Internet is quickly becoming as much a part of daily life in the home as water, gas, and electricity. A high-speed, always-on Internet connection is now a fundamental utility in the home, enabling a broad range of applications, solutions, and services that save people time, increase family convenience and security, and […]