Category Archives: Configuring Cisco Catalyst Series Switches

Cisco Configuring Route EBGP Multihop Lab20

Cisco Configuring Route EBGP Multihop Lab20 Topology Diagram Lab Prerequisites If you are using GNS3 than load the GNS3 topology than start devices or using Packet Tracert for this Lab, Lab configure on R1,R2,R3,R4,R5,R6,R7,R8,R9,R10 Establish a console session with all devices than configure the devices respected hostname(s) using Putty. Lab Instruction CLI Quick Configuration To quickly configure this… Read More »

Cisco Configuring Route BGP Update Source Lab17

Cisco Configuring Route BGP Update Source Lab17 Topology Diagram Lab Prerequisites If you are using GNS3 than load the GNS3 topology than start devices or using Packet Tracert for this Lab, Lab configure on R1,R2,R3,R4,R5,R6,R7,R8,R9,R10 Establish a console session with all devices than configure the devices respected hostname(s) using Putty. Lab Instruction CLI Quick Configuration To quickly configure… Read More »

CDP (Cisco Discovery protocol) and LLDP (Link Layer Discovery Protocol)

CDP (Cisco Discovery protocol) and LLDP (Link Layer Discovery Protocol)

Basic Redistribution Between Cisco EIGRP and OSPF

The most common scenario for big enterprise networks with multiple routers is to have a single IGP routing protocol (IGP = Interior Gateway Protocol) running between the routers in order to distribute all the routing information of the network. The most common IGP routing protocols used by today’s networks are OSPF, EIGRP (Cisco proprietary) and in some cases… Read More »

Configure Access Control Lists Cisco Switch

Security Hardening Checklist for Cisco Routers/Switches in 10 Steps

Network infrastructure devices (routers, switches, load balancers, firewalls etc) are among the assets of an enterprise that play an important role in security and thus need to be protected and configured accordingly. Many enterprises focus on protecting their servers, applications, databases etc but they forget about security of network devices which are sometimes installed with out-of-the-box configurations. A… Read More »

T1 PPP and HDLC Configuration Cisco

Real World Application & Core Knowledge As a network engineer you will encounter T1 links very often as T1’s are the de facto standard of nearly all small branch offices. T1’s operate at 1.544Mbps (1544Kbps) and now days commonly drop into a facilities point of presence (pop) or commonly (BPOP) as the POP is most commonly in the… Read More »

Configuring Port Mirroring SPAN Session Cisco

Real World Application & Core Knowledge Have you ever wanted to replicate traffic switch port to another switchport so you can view the traffic with Wireshark? Well there is a way to achieve that; its called Switch Port Analyzer Session, commonly referred to as a SPAN. The industry knows this type of technology as “Port Mirroring” which is… Read More »

Configuring Sticky Switchport Security Cisco

Real World Application & Core Knowledge If you completed the previous lab; Configuring Dynamic Switchport Security than you’ll be pretty much up to speed in this lab. Dynamic port security is great but what about when you connect switches to routers or other devices that need to be secured in a way to prevent unauthorized device swapping in… Read More »

Configuring Dynamic Switchport Security Cisco

Real World Application & Core Knowledge It’s common knowledge that when a switch reaches the maximum limit for its mac address table it starts flooding traffic out all ports like a hub. Hackers know this and they will use this to gain access into a network. They know if they can flood the switch with thousands of fake… Read More »

Configuring Interface STP Attributes Cisco

Real World Application & Core Knowledge Now that you are familiar with the basic operation of PVST, Rapid-PVST and MST its time to take another step down the sidewalk of complex avenue. There are several interface configuration commands specific to spanning tree on the Cisco Catalyst Series switches. This lab will discuss and demonstrate the following features; STP… Read More »

Configuring BPDU Guard Cisco

Real World Application & Core Knowledge So what happens when an end user on your network gets the smart idea of plugging a mini switch into multiple wall jacks that are connected to two different switches? A simple answer would be a fancy light show in the wiring closet but the technical answer would be a layer two… Read More »