In this blog let’s study PIM dense multicast routing. Introduction This post is a part of a serie of posts that introduce the operation of multicast routing: We explore in this post, the operation of PIM multicast routing protocol in the by default operation mode PIM Dense mode. The idea is very simple: flood the…...
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Cisco secure client helps secure access to the network at the endpoint level. it’s an endpoint security and embarks multiple agents (in one single client or piece of software). let’s detail the functionality of this client software. a bigger view the very usual use case is when a client tries to access enterprise resources. to…...
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In this blog, let’s check options to enable DNS protection using meraki and integration with cisco secure connect (or Umbrella) First of all… First of all let’s recall how DNS protection works in CsC or Cisco Umbrella. To be protected a DNS request must reach the dns.sse.cisco.com that can resolve to this IP address for…...
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In this post, let’s recall what is subnetting for routing and switching purposes and how it is done. Motivation Network subnetting is very important subject that maybe referred to as VLSM for variable length subnetting. The basic idea is about managing a space of IP addresses (IPv4). Historically, a network length or space was fixed…...
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In this blog, we introduce SSM way of multicasting. Introduction and definitions This post is a part of a serie of post about Multicast operation from the most basic setup to a much complicated one (scenario that include more routing and receiving options, etc.). We will explore the operation of SSM (Source Specific Multicast) in…...
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In this post, we present an example of an IPv6 network operation, based on a home network setup that is a PC (Windows) and a box (an internet box provided by an ISP that supports IPv6). Introduction In the first paragraphs, we talk about some general motivations to use IPv6 instead of IPv4. Then, we…
