Cisco - IOS Tutorial

       Long time ago before I attend my CCNA in Bangkok, I have no idea how those Network Administrator/IT Engineer configure Cisco router and switch. Just know they have good knowledge on the cisco coding.

       While configure a cisco router, there are few kind of mode can be use:

1.User Mode
2.Priviledge Mode
3.Config Mode
4.Interface Mode
5.line mode

Cisco Router Basic Configuration Need:
1.Password + Secret
2.Hostname
3.Interface (IP and subnet mask, no shut, and clock rate)
4.Line configuration



All this routing require different command for different protocol. To learn how to use the cisco router command from below lab...

       The above code are just a very basic configuration for cisco router, there are more advance configuration need for routing purpose such as static routes, default routes and dynamic routes. Within dynamic routes, there are also RIP Routes (Routing Information Protocol), IGRP Routes (Interior Gateway Routing Protocol) OSPF Routes (Open Shortest Path First) and EIGRP Routes (Enhanced Interior Gateway Routing Protocol)

Configuring Inter-VLAN Routing

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Visio Network Stencils

       As a network engineer more than 10 years, there will be a number of different times that a network diagram will be used to offer a layout of how the network is constructed and connected together. The knowledge of how to create and interpret these diagrams is vital in a number of different circumstances. This blog is intended to be a primer on cisco network diagrams, what the Cisco symbols are, how to download the Cisco Visio Stencils and how show the example of the network diagram.


       There are certainly a number of different things that a new network engineer needs to learn before being considered experienced. One of the most underrated skills is the ability to both create and understand network diagrams. As a network engineer, there will be a number of different times that a network diagram will be used to offer a layout of how the network is constructed and connected together. The knowledge of how to create and interpret these diagrams is vital in a number of different circumstances.


       Benefit of the network diagramming that is one way of graphically representing tasks in a project in a way which is easy for the managers and the team members to understand easily Representing Activities in terms of a network diagram.  Cisco SymbolizationCisco uses its own brand of networking symbols. Since Cisco has a large Internet presence and designs a broad variety of network devices, its list of symbols ("Network Topology Icons") is exhaustive. As of July 19, 2011 this list can be found at

http://www.cisco.com/web/about/ac50/ac47/2.html

So here are the example of a networking diagram I made with the Visio program about Data Center High Level Design Diagram

       These are really useful for impressing the management with fancy network diagrams!...There are lots of Visio stencils of Cisco devices available to download here:
Cisco Visio Stencils

http://www.cisco.com/en/US/products/hw/prod_cat_visios.html

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Cisco VTP: VLAN Trunking Protocol

       VLAN Trunking Protocol (VTP) is a Cisco Layer 2 messaging protocol that manages the addition, deletion, and renaming of VLANs on a network-wide basis. Virtual Local Area Network (VLAN) Trunk Protocol (VTP) 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 reduces the need to configure the same VLAN everywhere. VTP is a Cisco-proprietary protocol that is available on most of the Cisco Catalyst Family products.

       VTP ensures that all switches in the VTP domain are aware of all VLANs. There are occasions, however, when VTP can create unnecessary traffic. All unknown unicasts and broadcasts in a VLAN are flooded over the entire VLAN. All switches in the network receive all broadcasts, even in situations where few users are connected in that VLAN. VTP pruning is a feature used to eliminate (or prune) this unnecessary traffic.

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