Thursday, March 5, 2026

TEK@link

efficiency of innovation

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TEK@link

efficiency of innovation

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Network

related to network topics such a routing and switching. may include also some topics related to doing qos infrastructure management and administration

BGP Session Keepalive And Hold Times

dexterd05 mins

In this post we’ll deep into the operation of BGP that is a Border Gateway protocol aimed at connecting (routing information exchange) autonomous system in contrast with IGP (Interior Gateway Protocols) that run into each autonomous system. Thus, we do not need to have detailed information about IGPs to exchange routing information… before this routing…...

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I-BGP Synchronization With IGP

dexterd16 mins

In this blog, we will discuss the I-BGP synchronization with IGP feature. A little introduction By definition, the BGP synchronization rule requires that when a BGP router receives information about a network from an I-BGP neighbor, it does not use this information until a matching route : static or dynamic : learned via an IGP…...

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Vlan Propagation And Cisco FabricPath

dexterd06 mins

In this post, we explore the operation of Cisco FabricPath (FP) and more specifically Vlan information propagation in this fabric in comparison with other platforms: Catalyst for example from the same vendor. Introduction The case is to learn how the switches that are part of the LAN network learn about and support Vlan operation: is…...

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EIGRP Over a vNet Trunk

dexterd04 mins

In this blog, we’ll explore the operation of IGP interior routing protocol EIGRP over vNET trunks (another way to say networking trunking similar to vlan trunks used in L2 network by switches to trunks multiple traffics from different vlans into the same physical link) Little introduction New IOS release 15.x introduced Easy Virtual Network (EVN)…...

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VPNv4 BGP AS-Override Feature Into Play!

dexterd04 mins

Let’s put into play AS-Override feature in BGP: see when it applies and how it works. Introduction First, AS-Override feature applies to sites that have the same AS number but are linked by another different domain with different AS number, as in the next figure. In our example AS number 1 has neighborship (E-BGP links)…...

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