Certification Blog

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Redistributing iBGP Prefixes into IGP

Redistribution is a very common implementation in every network where multiple routing protocols are
Redistribution is a very common implementation in every network where multiple routing protocols are [More]

Dynamic BGP Peering

Hello Friends,Today we are going to discuss about an interesting feature of BGP i.e. Dynamic BGP Pee
Hello Friends,Today we are going to discuss about an interesting feature of BGP i.e. Dynamic BGP Pee [More]

BGP Next-Hop-Self

Hello Friends,Today we will be discussing about one of the important fundamental topics of BGP - BGP
Hello Friends,Today we will be discussing about one of the important fundamental topics of BGP - BGP [More]

OSPF NSSA Area and NSSA Totally Stub Area

Hello Friends,In our last post, we discussed about OSPF Stub Area and OSPF Totally Stubby Area. We s
Hello Friends,In our last post, we discussed about OSPF Stub Area and OSPF Totally Stubby Area. We s [More]

OSPF Stub Area and Totally Stubby Area

Hello Friends, Today we will be discussing about one of the OSPF Area Types i.e OSPF Stub Area.
Hello Friends, Today we will be discussing about one of the OSPF Area Types i.e OSPF Stub Area. [More]

Configuring HSRP version 2 on Nexus

Hello Friends Today we will be discussing on how to configure HSRP version 2 on Nexus platform. HSRP protocol supports two versions. Version 1 and Version 2. The HSRP version sends hello on multicast address 224.0.0.2 (which also contradicts with CGMP) and we can configure groups from 0 to 255. With HSRP version 2, you can configure from 0 to 4095 groups and it uses multicast address of 224.0.0.102. It also uses a new MAC address range 0000.0C9F.F000 to 0000.0C9F.FFFF as compared to H... [More]

Configuring OSPF Virtual-Link

Hello Friends Today we will be discussing about one of the most common but important topics in CCNP Route examination and also in CCIE - OSPF Virtual-Link. In OSPF, all the areas within the Autonomous System should be connected to the backbone area i.e. Area 0. Now consider a situation when there are two companies which are going through a merger. Their networks will also have to be merged. Now, if both the companies have backbone area in their core and they want to merge their network over a n... [More]

Unequal Cost-Path Load Balancing - EIGRP

This article shows the how the unequal cost load-balancing is supported in EIGRP and how to configure it using the variance command.
This article shows the how the unequal cost load-balancing is supported in EIGRP and how to configure it using the variance command. [More]

BGP redistribute-internal

Hello Friends, Redistribution is one of the most complex topics in CCIE R&S certifications as we hear from our students. We would like to share one interesting topic on redistribution of iBGP routes into IGP. We shall discuss this issue in context to IPv6. By default, iBGP prefixes are marked not to get redistributed. That means a prefix learnt via iBGP cannot be redistributed into an IGP. But note that redistribution of iBGP prefixes into IGP is not a good solution. The reason being, it ca... [More]

RIP Classful/Classless Routing on Cisco IOS

This post presents an understanding of classless and classful routing behavior of Routing Information Protocol or RIP through practical example which is elaborated with show and debug commands to give the reader a clear understanding of the operation of the RIP protocol. You can see how a distance vector protocol behaves through a practical example.
This post presents an understanding of classless and classful routing behavior of Routing Information Protocol or RIP through practical example which is elaborated with show and debug commands to give the reader a clear understanding of the operation of the RIP protocol. You can see how a distance vector protocol behaves through a practical example. [More]