Networking Knowledge Base

Hello Everyone, In this document, I am going to present how OSPF calculates metric for external routes. I am using the following scenario for this presentation. There are two ASBRs in area 1. 88.88.88.88 and 99.99.99.99 are loopback interfaces on R1...

Are you headed to Cisco Live?  Interested in SD-Access sessions?  We've got a great SD-Access session map for you to follow.  Here's the scoop:Plan to visit ALL of the SD-Access sessions!  CRS sessions are scheduled sequentially, but EWN & DCN are sc...

WelcomeWe've got some fascinating innovators in the community ready to answer your questions about Cisco's Network Architecture.  Meet them, friend them, chat with them.  They'd love to answer your questions and start a conversation. Tim SzigetiView ...

Introducing an entirely new era of networking. The Network. Intuitive. Constantly learning, constantly adapting, constantly protecting. The Network Intuitive is the future state of networking, predicated on the insane demands of doing business today ...

Introudction: In This Doc i will focus on The 6to4 Tunneling mechanism on finding the destination Tunnel peer IP address as this part was not clear for me in many Docs and articles that i had read Topology: Scenario: From the above topology we have...

Hello everyone, In this document, I am going to present why the Forward Address is necessary in redistribution of external routes. OSPF always has fun with us. Lets have some fun with OSPF. Prerequisite: Knowledge of NSSA in OSPF  I am using the foll...

There are 2 methods of booting and running IOS XE software in 3850 switch/stack.By default, the switches are shipped in Install mode. Bundle mode: Bundle mode is where we boot the switch/stack using the .bin file. This is the traditional method of bo...

Core Issue:Explaination: Recommended Action: Source link: Core Issue:User Received “%C4K_L2MAN-6-INVALIDSOURCEADDRESSPACKET:” error message on Cisco 4500. Below is sample output of this error message.In this Example user received error message on 450...

I. Introduction   This document provides common steps and commands used to retrieve core files in Nexus switching platforms -  Nexus7000, Nexus5000, Nexus 4000, Nexus 3000 and Nexus2000.   II. Technical Background Information:   NX-OS is a full-featu...

The term “backdoor” is a very controversial term when it comes to privacy and security. However, when it comes to BGP, it is a well-known feature that is used to change the administrative distance of eBGP in order for an interior gateway routing prot...

Core IssueFor packets to be forwarded across a network from one device to another, they have to be encapsulated in a Layer 2 (L2) frame containing the L2 source and destination addresses. When IP operates over a LAN like the Ethernet, it uses Address...

Introduction:This document talks about the LAC configuration which terminated PPPoE connection from PPPoE client and based on the username i.e domain, it runnels the user via L2TP tunnel to LNS.For PPPoE client configuration, visithttps://supportfor...

Hi Team, Need to understand why I am getting below error logs.Even this error I am getting neighbour connected switch as well  IOS version : 03.07.04.E Interface : TenGigabitEthernet2/0/11, we are not observing  interface errors (CRC,Input and outp...

Let's take a look at how we can change our default route using IP SLA.First we create our IP SLA. In this example we want to ping our default  gateway of our primary internet connection. In the above diagram that would  relate to 11.b.c.d.ip sla moni...