BCMSN
Once VLANS have been defined on a switch and you have placed ports into their corresponding VLANS, traffic is limited to remain inside it’s Virtual LAN. The only way for traffic to leave the switch, is to have it sent on a port that is in the same VLAN
BCMSN
Almost 100% of Cisco switches will have a 50 second delay on a port before it goes live. What this means, is that when you plug a new device into a switch such as a PC, there will be a 50 second delay before the port will become active and
CCENT (ICND1)
The configuration of an IP address and default-gateway on a switch is slightly different from a router. Firstly a router doesn’t have a default-gateway but rather a default route. A switch on the other hand can have a default-gateway, especially if the device is in layer 2 mode. If
BCMSN
SPAN (Switched Port Analyser) is a requirement whenever you have a system that wishes to log and monitor traffic that is passing through a switch. Since a switch only sends traffic to the machine requiring the packets, adding a sniffer to the switch would result in you only seeing traffic
IINS
As part of any management and audit solution for networking, Syslog is vital. Syslog messages allow us to track system error messages, exceptions, and other information, such as device configuration changes. It allows for historical reporting, depending on the application keeping the logs, as well as help in fault finding.
CCENT (ICND1)
In the event that you have lost the configuration on your Cisco device, restoration is straight forward assuming of course you had made a backup. There are 2 ways to restore the configuration to put our device back to normal 1. Copy and paste the backup configuration directly to the
CCENT (ICND1)
Cisco brings out new versions of the operating system quite frequently, and of course there are different versions of the operating system for each of the appliances. Different IOS’s will support different commands and different features and it’s not uncommon to have to change the IOS that your
CCENT (ICND1)
The first and most important rule in IT, is “Backup soon, Backup often!” It’s a logical statement but sadly one that many people only truly appreciate when it’s too late! Two of the most important files on a Cisco router are the Running-Configuration which stores the current configuration
CCNA (ICND2)
Cisco offers a password recovery technique for almost every device they have available. In this post, I’m going to cover how to complete a password recovery on a Cisco router. There are 2 things that have to be in place before a password recovery can be done. 1. Physical
ISCW
Cisco offers many additional ways to secure our routers further by hardening passwords and creating methods to prevent brute force attacks. In this post, which is more a show and tell, we will look at additional commands that you may want to implement on your devices to secure them further.
CCNA Security
In most smaller networks, or networks that have a few network administrators, when you log into a Cisco device you are only prompted for a password. This will take you to the Router> prompt where more than likely you will immediately type ‘enable’ to enter into privileged exec mode,
IINS
Secure Shell (SSH) is a protocol that allows us to connect to devices securely by using encryption. Gone are the days were most networking engineers are happy with using plain telnet with it’s clear text transmission of data which could result in an attacker sniffing the line for usernames