Author name: Andrew Walding

This How To explains username configuration.  Short and sweet. Step 1: With use of below command we can create User in Cisco Router Cell_Router(config)#username AWALDING priv 15 password CELLSTREAM Step 2: Also, we have to enable this at each line Cell_Router(config)# line con 0Cell_Router(config-line)#login local Cell_Router(config)# line vty 0 15Cell_Router(config-line)#login local Cell_Router(config)# line aux 0Cell_Router(config-line)#login local

In this How To we will explain the procedure for Warm Upgrade and Reload. The examples are shown on a Cisco 2811 Router. The warm upgrade feature of the Cisco IOS was offered in Cisco IOS version 12.3(11)T. The warm reload feature of the Cisco IOS was offered in IOS version 12.3(2)T. What are the

Have you ever loaded a router with IOS that is too big for memory? If you have, then you have ended up in a problem and the router dumps you to ROM Monitor or ROMMON prompt. In this How To we weill explain what to do. There is a simple way to reload the router

The ability to monitor your network traffic is critical for all network administrators and managers. This means getting down to the packet level. To get down to the packet level, you have to use a protocol analyzer that will dissect the packets and conversations that occur on the network. Most users are familiar with packet

In this How To we will provide an overview of Smartports and how they can help with your Cisco switch administration.  Cisco now calls these Auto Smartports.  The Smartports macros can speed up deployment while ensuring accuracy and consistency on your switch ports.  Simply put, Smartports macros are pre-created configuration scripts that work on most

Here is what you need to know with regards to the Configuration Register in Cisco IOS. All Cisco routers have a 16-bit software register in NVRAM. The default is for Cisco routers to load Cisco IOS from FLASH MEMORY and to look for and load the STARTUP-CONFIG file from NVRAM. Some Reference Stuff Here is

We are often asked about ICMP, and how it should be managed on a network. We hope this How To will explain this protocol a little and provide some initial guidance. What is ICMP? The Internet Control Message Protocol (ICMP) is part of Layer 3, not Layer 4 TCP, and it’s not UDP. ICMP provides

To save you time searching through thousands of documents and sometimes disjointed practices, here are some of our recommendations for securing Cisco routers. These practices can also be applied to other routers in general, though we provide no specifics for others. Security is always a concern to those who manage and configure routers. Every router

This one is short and sweet. Is your traceroute responding with “* * *”, or did you enter 1000000000 for the number of extended pings? Easy – simply type CTRL-SHIFT-6 to break the process. That is the Control Key (hold down), the Shift Key (also hold down) and the “6” key – all at the

In this How To, we explain Cisco SNAT.  Cisco SNAT allows two or more routers performing the NAT function as a group. This is really handy for redundancy purposes, and can be used in conjunction with Cisco’s HSRP function (click here to see how HSRP is configured). The NAT routers are going to exchange information

The Virtual Router Redundancy Protocol (VRRP) is a computer networking protocol that provides for automatic assignment of available Internet Protocol (IP) routers to participating hosts. This increases the availability and reliability of routing paths via automatic default gateway selections on an IP subnetwork. See RFC 5798. VRRP provides information on the state of a router,

How many times have I received a router that has no operating system on it?  Way to many!!  You turn on the router and it comes up in ROM Monitor mode (ROMMON). There is a way to get the operating system on the router from ROMMON.  Below, I have documented the procedure. Preparation Before starting

Monitoring the traffic pattern on a network are essential in today’s network.  If network administrators do stay on top of the traffic patterns, they may make crucial mistakes in network provisioning or design.  With the Internet in a constant state of flux as new and hot applications emerge, this task becomes even more important.  Another

What is AAA? It stands for Authentication, Authorization, and Accounting. When it comes to network security, AAA is one of many features a network manager may use. Here is what each of these are used for and why you should care: Authentication: Identifies users by login and password using challenge and response methodology before the

ACL’s’ are vital to networking today. Everyone uses them, and proper usage is imperative. Besides being difficult to use at times, the penalty for an ACL mistake is huge. In one swift swoop, you could incorrectly permit malicious attackers onto your network or incorrectly deny all valid users from your network. Either way, the consequences