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A collection of 8 posts

Configuring PAT on Cisco Routers (NAT Overload)

Configuring PAT on Cisco Routers (NAT Overload)

What is PAT (Port Address Translation)? PAT (Port Address Translation), also known as NAT Overload, is a form of Network Address Translation that allows multiple devices on a private network to share a single public IP address. Unlike one-to-one NAT, PAT uses port numbers to differentiate between multiple internal connections,

Configuring Static NAT on Cisco Routers

Configuring Static NAT on Cisco Routers

In my previous post on NAT, I explained the difference between the 3 different types of NAT that can be configured. In this tutorial I’m going to cover the configuration steps to configure static NAT. Static NAT is a one-to-one mapping. It allows us to translate a single IP

ISDN and Multilink with load-threshold

ISDN and Multilink with load-threshold

Configuration Steps: 1. Configure the BRI interfaces Router(config)# interface bri 0/0/0 Router(config-if)# ip address 10.0.0.1 255.255.255.0 Router(config-if)# encapsulation ppp Router(config-if)# isdn spid1 0835866101 8358661 Router(config-if)# isdn spid2 0835866301 8358663 Router(config-if)# dialer string 8358662 Router(config-if)# dialer-group

Floating Static Routes

Floating Static Routes

Floating static routes are static routes that are not installed in the routing table until the primary path fails. They are configured with a higher administrative distance (AD) than the primary route, which prevents them from being installed in the routing table. When the primary route fails, the floating static

Configuring Basic ISDN with Interesting Traffic

Configuring Basic ISDN with Interesting Traffic

When configuring ISDN with interesting traffic, it’s important to first understand how Cisco defines ‘interesting’ and what this means in terms of the connection been formed. Interesting traffic is traffic that we define in the form of an access-list that is allowed to cause the ISDN to dial. This

ISDN Switch-type

ISDN Switch-type

In order for any ISDN lines to establish Layer-1 connectivity the switch-type has to be defined correctly. The switch-type is very much country dependant so it’s also important to memorize the switch-type that applies to where you do most of your installations. If Layer-1 is showing ‘Deactivated’ when using

Configuring PPP Encapsulation

Configuring PPP Encapsulation

Point-to-Point Protocol (PPP) is a data link layer protocol that is used to establish a direct connection between two network nodes. It is commonly used for serial connections, dial-up connections, and VPNs. PPP provides features such as authentication, compression, and error detection. In this article, we'll learn how

Clock rate and Bandwidth commands

Clock rate and Bandwidth commands

Two commands in Cisco router configuration that often cause confusion are the clock rate and bandwidth commands. Let me explain the difference between these two important interface configuration commands. Clock Rate Command The clock rate command is used on serial interfaces to set the actual physical transmission speed of the