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A brief video on how to create large topologies with a small amount of Juniper boxes through the use of logical systems, we split the box into up to 15 different logical systems and assign a physical interface to each logical system, we then use VLAN tags to simulate our links between the boxes, all…
Read More JunOS Logical Systems // How to create topologies
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Introduction to MPLS RSVP in a multi-vendor service provider topology, dynamic and explicit path configuration.
Read More MPLS RSVP Intro and Config | JunOS – IOSXR
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This will be a quick stop before we jump into MPLS LDP and TE, I have decided to write a brief post about the differences on MTU when working with IOS, IOS-XR and JunOS, so for this, I have extracted a part of the bigger topology that we will later use. For now, we…
Read More The Cisco and Juniper MTU Brief
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Brief implementation of basic QoS techniques, this is meant to reference the last post on QoS.
Read More Cisco QoS | Remark Police Detect and Shape
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The purpose of this post is to provide a basic description and implementation of Quality of Service techniques, specifically in a Cisco deployment, additionally, this will serve as a QoS study guide for the CCIE R&S exam. Please refer to vendor documentation and third party literature for more in-depth concepts. QoS is typically broken out…
Read More Intro to QoS // The HQF
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Brief introduction to Cisco’s enterprise SDN solution APIC-EM and then a simple demonstration of Napalm, a python library for interacting with different network device platforms.
Read More Cisco APIC-EM / Python Napalm
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From now on, we will skip over some of the sections of the blueprint in order to cover the fundamentals of the technologies or applications introduced in the CCIE first, meaning we will try to go over the stuff that is not covered previously in the CCNP exams. This time, we will talk about Multicast,…
Read More IP Multicast: IGMP/PIM/Auto-RP/BSR
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In this video we go over a basic Python 2 script for querying a MySQL database, we iterate through the resulting list to get some interesting information and let the user choose which host they want to connect to, from there we can execute commands and get outputs. Make sure you set the quality to…
Read More Python: MySQL Query Cisco Customer DB
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Moving on through the OSI model we face the Layer 4, here we will probably find the TCP or UDP header, let’s very briefly go over the basic structure and use cases for the two, then we will set up an example topology and try to dissect a TCP session establishment, and then maybe observe a UDP header. After that…
Read More TCP/UDP Operations | IPv6 PMTUD
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In this post we will touch different topics, although they are all going to be related to Internet Protocol concepts. What is ICMP anyways ? what are the different IPv4 options ? what is fragmentation ? how does the IP MTU and TTL relate to ICMP messages ? these are all questions that we will…
Read More Back to IP/ICMP PMTUD IPv6