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Building an ISP eBGP Peering Lab in Cisco Modeling Labs
In this lab we will simulate an Internet Edge in Cisco Modeling Labs using BGP. The Internet Edge is where ISPs peer with other ISPs.
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How Telecom Multiplexers Work: SONET, DWDM and ROADM
Introduction In this article we will be discussing optical multiplexers. Optical multiplexers were the successor to lower-bandwidth copper based T1 and T3 multiplexers. I discuss T-Carrier and FDM multiplexers in this previous article: How Telecom Multiplexers Work: From FDM to T1 and T3. What is SONET/SDH? SONET stands for Synchronous Optical Networking. It is also…
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Provider Networking: What is a BRAS/BNG in Telecom?
A Broadband Remote Access Server or Broadband Network Gateway (BRAS/BNG) is a key component of an Internet Service Provider’s network. Let’s take a look at what exactly a BRAS/BNG is and how it works.
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How Telecom Multiplexers Work: From FDM to T1 and T3
In this two part article we’ll explore the history of the multiplexer, how it works, and why it is the backbone of provider networking.
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How to Build a Layer 2 Multipoint VPN (VPLS) in Cisco Modeling Labs
In this lab we will configure a VPLS layer 2 VPN on the CSR1000v image in Cisco Modeling Labs. VPLS is one technology that service providers can use to implement the E-LAN MEF standard.
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VPLS Configuration Issues in Cisco Modeling Labs (IOS XRd)
Having issues configuring VPLS/EVPN on IOS XRd or IOS XRv9000k? This article explains why and how to work around the issue.
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How VPWS and VPLS Layer 2 VPNs Work
VPWS and VPLS are both Layer 2 VPN technologies that carriers can use to transport Ethernet over an MPLS core. In this article we’ll look at the similarities and differences between the two.
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A History of the Leased Line
Introduction The concept of a leased line, where a customer pays a service provider for a private WAN connection predates computer networking. In fact, the origins of the leased line were in the telegraph days. Over the years the term has been used to describe a multitude of different services. It’s easy to confuse different…
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How to Build a Layer 2 VPN (VPWS) in Cisco Modeling Labs
In this lab we will build a layer 2 point-to-point Virtual Private Wire Service (VPWS) in Cisco Modeling Labs.
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Adding VyOS Router to Cisco Modeling Labs
A step-by-step guide on how to add a custom VyOS Router node to Cisco Modeling Labs by converting the VyOS .iso to .qcow2.