When Do You Use Static Routes?
Every router must have a route to know where to send traffic. We compare this to the post office’s predetermined ways to route your postal mail to its destination. When a router receives a packet from the LAN or the…
Category: Protocol
BGP Routing Protocol Tips You Need to Know
Perhaps you are thinking that you could care less about some routing protocol called BGP. Could it possibly have anything to do with your everyday life? The answer is yes. BGP is the routing protocol of the Internet. BGP is…
Routing Information Protocol & RIP Configuration
Introduction to Routing Information Protocol (RIP) IP RIP (Routing Information Protocol) comes in two different versions: 1 and 2. Version 1 is a distance vector protocol (RFC 1058) and Version 2 is a hybrid protocol (RFCs 1721 and 1722). Routing Information Protocol Version 1…
How to Configure IGRP (Interior Gateway Routing Protocol)?
Interior Gateway Routing Protocol (IGRP) is a distance vector interior routing protocol (IGP) invented by Cisco. It is used by routers to exchange routing data within an autonomous system. IGRP is a proprietary protocol. IGRP was created in part to…
Port Forwarding a Range of Ports on Cisco IOS
One question that routinely comes up in a particular forum that we frequent is “How do I port forward a range of ports?” Usually, this question is met with one of two answers: 1) you don’t, or 2) manually enter…
How to Configure NAT in Cisco IOS?
NAT (Network Address Translation), it in simple terms translates an IP address into another. Network Address Translation is of different types like Static NAT (One to One) Dynamic NAT (Many to Many) Overloading (Many to One) The main purpose of…
Basic Information of Configuring HSRP on a Cisco Router
Hot Standby Routing Protocol or HSRP, is a Cisco proprietary protocol that allows two or more routers to work together to represent a single IP address for a particular network. HSRP, as well as Virtual Route Redundancy Protocol (VRRP) are…
What the Main Difference between HSRP, VRRP and GLBP Protocols
In this article we will cover comparison of various first hop redundancy protocols. HSRP, VRRP and GLBP are the main three first hop redundancy protocols. In order to take the right decision for your network you should know the basics regarding all…
How to Configure GLBP in Cisco IOS Routers?
Gateway Load Balancing Protocol (GLBP) as the name implies can be used to configure Gateway redundancy between a group of routers and at the same time load balance the traffic across all of them. GLBP is similar to the High availability…
Cisco First Hop Redundancy Protocols: HSRP, VRRP, GLBP
When designing a network, one of the common things to focus on after simple access is how the network will deal with failure. Part of this process is trying to build as much redundancy into the design as financially possible,…
FAQ: What Network Users Care about IPv6?
This article contains Frequently Asked Questions (FAQ’s) about Internet Protocol Version 6(IPv6). Q. How to limit clients getting an IPv6 address without using a DHCP server ? A. Use the command“ipv6nd prefix <prefix> no-advertise”.This will set a bit in theIPv6 NA…
How to Configure GLBP?
Gateway Load Balancing Protocol (GLBP) provides redundancy for IP networks, ensuring that user traffic immediately and transparently recovers from first hop router failures, while allowing packet load sharing between a group of redundant routers. GLBP provides load balancing over multiple…
How to Fix OSPF Split Area with GRE Tunnel?
‘How to Fix OSPF Split Area with GRE Tunnel?’ Well, here we will share a document of Fixing OSPF Split Area with GRE Tunnel from Cisco Support Community, which tell us the details and steps to configure OSPF, GRE Tunnel…
Tips & Examples: Configuring a GRE Tunnel
Tunneling provides a mechanism to transport packets of one protocol within another protocol. The protocol that is carried is called as the passenger protocol, and the protocol that is used for carrying the passenger protocol is called as the transport…
How to Configure Spanning Tree Protocol (STP) on Catalyst Switches?
Spanning Tree Protocol (STP) is a Layer 2 protocol that runs on bridges and switches. The specification for STP is IEEE 802.1D. The main purpose of STP is to ensure that you do not create loops when you have redundant…
Five Things You Should Know About DHCP Snooping
DHCP snooping allows the switch to monitor and control DHCP messages received from untrusted devices connected to the switch. When DHCP snooping is enabled, the system builds and maintains a database of valid IP-address/MAC-address (IP-MAC) bindings called the DHCP snooping…
Cisco VTP Version 3, Is VTP Making a Comeback?
What is VTPv3? VTP version 3 is the third version of the VLAN trunk protocol and enhances its initial functions well beyond the handling of VLAN matters. There is a document at Cisco.com about VTPv3. Let’s dig into that. Features The…
STP (Spanning Tree Protocol) Path Selection
The Spanning Tree Protocol (STP) is a network protocol that ensures a loop-free topology for any bridged Ethernet local area network. The basic function of STP is to prevent bridge loops and the broadcast radiation that results from them. Spanning…
How to Set Up IPSec Direct Encapsulation on Cisco Devices?
With the importance of internet security being at the forefront of everyone’s mind these days, importance of keeping data safe while in transit is vital. There are of course a number of different technologies that are available to keep data…
‘What Happens in the VLAN Stays in the VLAN?’
“What is your favorite use of the word Virtual? Virtual Machine, Virtual Reality, Virtual Assistant? One of my favorites is Virtual Local Area Network, (VLAN). Join me as we discover the secrets of the VLAN and why it is a…
Cisco CCNP: How to Configure IP Source Guard?
IP Source Guard is a per-interface traffic filter that permits IP traffic only when the IP address and MAC address of each packet matches one of two sources of IP and MAC address bindings: •Entries in the Dynamic Host Configuration…
Cisco VSS Configuration: Cisco Catalyst 6500 Virtual Switching System
A VSS is network system virtualization technology that pools multiple Cisco Catalyst 6500 Series Switches into one virtual switch, increasing operational efficiency, boosting nonstop communications, and scaling system bandwidth capacity to 1.4 Tbps. At the initial phase, a VSS will…
