OSPF – Router Switch Blog

Layer-3 Switching or Layer-2 Switching?

Posted on February 10, 2014 by RouterSwitch Tech | 0 Comments

Have you ever faced designing a campus network or similar network of hospitals, factories and organizations? How to design a better network? What factors you need to count in? Here we found a case study provided by Ivan Pepelnjak (CCIE…

OSPFv3 vs. OSPFv2 Routing Protocol

Posted on August 8, 2013 by RouterSwitch Tech | 0 Comments

This article outlines few comparisons of OSPFv3 and OSPFv2 Routing Protocol. OSPFv3 has few similarities with that of IPv4 version i.e. OSPFv2 in some ways, like Packet Type, Interface Type, Neighbor Discovery Pattern, LSA flooding & aging. OSPFv3 and v2…

How to Troubleshoot OSPFv3 Frame-Relay?

Posted on August 7, 2013 by RouterSwitch Tech | 0 Comments

Open Shortest Path First (OSPFv3) is a link state protocol that supports IPv6 and as well as IPv4. OSPF version 3 differs from OSPF version 2 for IPv4 as some changes have been incorporated to facilitate IPv6. This article demonstrates how…

Conditional Route Origination in OSPF Domain

Posted on July 31, 2013 by RouterSwitch Tech | 0 Comments

Cisco device uses “default-information originate” statement to generate a default route in OSPF domain. There are two ways to originate default route by using this command: 1) When you configure “default-information originate” under OSPF process without any argument after this statement, OSPF process…

How to Troubleshoot and Verifying OSPF Configuration?

Posted on May 15, 2013 by RouterSwitch Tech | 0 Comments

There are several ways you can verify and troubleshoot OSPF configuration and operation, listed below are the necessary command to do this: How to verify OSPF Configuration: Show IP route command Show IP ospf command Show ip ospf database command…

EIGRP on a Cisco ASA Firewall Configuration

Posted on May 14, 2013 by RouterSwitch Tech | 0 Comments

The Cisco Adaptive Security Appliance is an integrated security equipment that can perform a variety of functions like firewall, intrusion prevention, VPN, content security, unified communications, and remote access. Among these functions, the ASA can also perform routing using popular…

Top 100 Interview Questions for Network Engineers

Understanding Different Router Numbers

Posted on February 1, 2013 by RouterSwitch Tech | 0 Comments

Many of the routing protocols implemented in Cisco’s IOS require a number to follow the command that enables the routing protocol in question. For example: “router eigrp 1,” “router bgp 1” or “router ospf 1”. If you’re new to routing,…

How to Fix OSPF Split Area with GRE Tunnel?

Posted on November 30, 2012 by RouterSwitch Tech | 0 Comments

‘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…

OSPF Areas Types, OSPF Router Types & OSPF Route Types

Posted on November 27, 2012 by RouterSwitch Tech | 0 Comments

OSPF is a link state routing protocol that updates the routing table only when network changes occur, rather than at a predefined interval. OSPF supports variable length subnet masks (VLSM) and route summarization. OSPF routers and links are grouped logically into areas…

How to Configure OSPF on Cisco Routers?

Posted on October 17, 2012 by RouterSwitch Tech | 0 Comments

OSPF (Open Shortest Path First) is a routing protocol developed by Internet Engineering Task Force (IETF). OSPF is standards-based which means it is available on routers by Cisco as well as other vendors, making it a vendor-neutral routing protocol. This…

How to Troubleshoot OSPF?

Posted on July 31, 2012 by RouterSwitch Tech | 0 Comments

OSPF is one of our more complicated routing protocols, and it can be pretty intimidating, especially at first. But once you have mastered how to configure this Link State Protocol, the first thing you realize is that it is built…

How to Configure IPSEC Encryption with the Cisco IOS?

Posted on July 27, 2012 by RouterSwitch Tech | 0 Comments

How to Configure IPSEC Encryption with the Cisco IOS (site to site VPN tunneling)? The OSPF dynamic routing protocol is probably the most popular LAN routing protocol today. OSPF can scale to the largest LANs but can also start out…

OSPF, How to Configure OSPF in the Cisco IOS?

Posted on July 19, 2012 by RouterSwitch Tech | 0 Comments

OSPF is an interior gateway protocol that routes Internet Protocol (IP) packets solely within a single routing domain (autonomous system). It gathers link state information from available routers and constructs a topology map of the network. The topology determines the…

Cisco Routing Quiz for Preparing CCNA Exam

Posted on July 18, 2012 by RouterSwitch Tech | 0 Comments

How to prepare Cisco CCNA Exam? What CCNA topics would be contained while preparing? Some CCNA experts pointed out 7 main CCNA topics (not for the test but for the real-world), IP subnetting, ACLs, Routing, Security – secure the router…