A Cisco IOS Access Control list (ACL) is used to define traffic. Once that “interesting” traffic is defined, some action can then be taken on that traffic.
Logging messages about packets permitted or denied by an IP access list is also available in Cisco IOS.
Logging-enabled ACLs provide insight into traffic as it traverses the network [...]
In my previous post on Static route configuration, I have touched on some basic of static route configuration. In this post, I will show you more details on how to configure static routing in Cisco devices.
IP routing is enabled on Cisco routers by default. If it has been previously disabled on your router, you can [...]
It is good to have CCNA credential if you would like to work as a network engineer. It shows that you have the basic foundation in the area of networking especially in the field of Cisco networking. Frankly, it would be easier when you are marketing yourself for a new IT job if you have [...]
It is important to understand the process of routing if you are interested in learning networking. One of the fundamental of this study is static routing. Static routing is not complicated, but it is the basic. We need to understand the basic in order to learn the advanced topics.
Static routing is the process of configuring [...]
Dynamic Host Configuration Protocol (DHCP) is one of the most popular TCP/IP protocol uses today. It is used by networked devices to obtain information required to operate on an Internet Protocol network. These information may include
IP address
Default gateway
DNS server address
and so on.
When a DHCP client is first switched on, it sends a [...]
These are some of the Cisco IOS commands use in managing CDP on Cisco router & switch
show cdp interface
show cdp neighbors
show cdp neighbors detail
debug cdp packets
undebug all
show cdp traffic
clear cdp counters
Following are some of the Cisco IOS show command on Cisco router / switch
show ?
show version
show clock
show hosts
show users
show history
show arp
show flash
show running-config
show starup-config
show interface
show protocol
Some notes on Cisco IOS router configuration.
Using TFTP for Cisco IOS Backup & Updates
Router#copy tftp flash
Using TFTP for Configuration File Backups & UPdates
Private Addressing
10.0.0.0 - 10.255.255.255
172.16.0.0 - 172.31.255.255
192.168.0.0 - 192.168.255.255