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Let’s 6rd!

6rd mechanism belongs to the same family as automatic 6to4, in which IPv6 traffic is encapsulated inside IPv4. The key difference is that with 6rd, Service Providers use their own 6rd prefix and control the transition of their access-aggregation IPv4-only part of their networks to native IPv6. In the same time, SPs transparently provide IPv6 availability service […]

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WCCPv2 and Squid-cache v3.1, a nice couple.

WCCP protocol can be much more interesting than the two commands needed for the CCIE exam. In this lab we will deploy a basic end-to-end solution using IOS 15.2S and the well known open-source solution Squid v3.1 as the content engine. WCCP version2 is deployed in the lab. 1-Topology WCCP enables the router to transparently intercept client […]

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OSPF external E1, E2, N1, N2…Who is the winner?

This lab focuses on route selection mechanism of OSPF external routes. The complexity of OSPF selection process is due to its inherent hierarchical structure. The following selection order should be familiar to you: intra-area (O) inter-area (IA) external routes OSPF provides more flexibility for external routes by manipulating the following criteria: Regular areas or NSSA […]

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Administrative Distance, prefix length, metric… Who is the winner?

The Concept Procedural tasks Result table Conclusion The concept The idea of the lab is to test the RIB best route election criteria of a border router. To do so, four overlapping subnets are configured in different parts of the network and available to a border router through different routing protocols. One of them is […]

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IPv6 over AToM pseudowire

The purpose of this lab is to show the flexibility of Layer2 VPN technology AToM (Any Transport over MPLS), which allows service providers to smoothly transit the core network from legacy layer2 technologies into a single MPLS infrastructure ready for customer IPv6 transport. Customer transition from IPv4 to dual stack is as easy as adding […]

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6VPE (IPv6 VPN Provider Edge Router)

6VPE is an easy solution to connect IPv6 customers through an existing stable IPv4 MPLS infrastructure. All clients have to do is to connect to a Provider Edge (configured with IPv6 VRFs) using IPv6. I hope this post will provide you with a brief and concise explanation about 6VPE. Let’s start with a short animation […]