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Network Admin Stuff

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CCNA Basics Cisco Basics (CCNA level) Lessons: Lessons: 01 - Connecting to Cisco Console Port with MINICOM 02 - Navigating in Cisco IOS 03 - Initial Configuration of Cisco Switch and Router 04 - Introduction to TCP/IP Layers 05 - Encapsulation and De-enapsulation Process 06 - Example of TCP/IP Traffic Flow 07 - Building a Home Network 08 - Ethernet and Hub Operations 09 - Bridging/Switching Learning Process  10 - Cisco Discovery Protocol  11 - Layer 2 Connectivity Troubleshooting Part 1 12 - Layer 2 Connectivity Troubleshooting Part 2 13 - Layer 2 Connectivity Troubleshooting Part 3 14 - NTP and Syslog Services 15 - VLANs Overview 16 - VLANs In Practice 17 - Inter VLAN Traffic Flow Analysis 18 - VTP and VLAN Quiz 19 - Spanning-Tree Protocol Overview 20 - Spanning-Tree Protocol Operation 21 - Spanning-Tree Protocol in Practice 22 - Spanning-Tree Cisco Enhancements 23 - Introduction to Rapid STP (802.1w) 24 - Layer 2 Etherchannel 25 - Switch Port Security 26 - Binary World 27 - IPv4 Addr
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IOU Forbidden Fruit

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IOU Forbidden Fruit Those who try to study networking technologies sooner or later want to test what they have learned through implementations.  Let's assume that you are a user of big C products, then you will have bunch of choices: Experiment by testing solutions on the production network. This is the shortest way to get fired.  DO NOT DO THAT! Get yourself a lab (on ebay there are tons of stuff), but when you power up 12 devices at home, the noise they generate may complicate your family life. After first electricity bill you can require a medical care as well. Use  Packet Tracer  software which a lot of students use to get their CCNA certificate. However, this is the  simulator  and not an  emulator  of the actual operating system. As such it will have inevitable shortcomings (it does not have all the features of real OS). GNS3 , which consists of dynamips supervisor allowing to run actual operating system such as IOS, JunOS, ASA operating system. This is my favorite emulator a
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Lesson 58 - Introduction to IPv6 - Migration

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Lesson 58 - Introduction to IPv6 - Migration Now, being equipped with some fundamental IPv6 knowledge, we can try to configure RIPng protocol (RIP Next Generation), as well as try to connect two different IPv6 networks over IPv4 cloud. I'm going to use the same topology in the previous lesson. Pic. 1 - IPv6-IPv4 Topology Diagram. Icons designed by: Andrzej Szoblik -  http://www.newo.pl Let's start off with enabling RIPng between  R1  and  R3  followed by some verification steps. RIPng is very similar to RIPv2 we used before. It uses similar mechanism such as split-horizon, maximum hop-count (16 hops), advertisements every 30 seconds, etc. It uses UDP port 521 (RIP uses UDP port 520).   Step 1 Configure IPv6 and IPv4 addresses and enable the interfaces. Check point-to-point reachability. R1  Configuration: ! interface Loopback0  no ip address   ipv6 address 2001:1:1:1::1/64 ! interface FastEthernet1/0  no ip address  duplex auto  speed auto   ipv6 address 2001:13:13:13::1/64 ! i
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Lesson 57 - Introduction to IPv6 - Address Configuration

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Lesson 57 - Introduction to IPv6 - Address Configuration It's time to put our hands to work now. Let's see how we can configure IPv6 addresses. I'm going to use the following topology diagram to present different options with regard to IPv6 address configuration on router's interfaces. Pic. 1 - IPv6-IPv4 Topology Diagram. Icons designed by: Andrzej Szoblik -  http://www.newo.pl I will use  R1  and  R3  to begin with. The whole 'Introduction to IPv6' series will end with connecting these two IPv6 networks over IPv4 cloud to show you one of many migration options available. As you already know, each IPv6-enabled interface, be it a router or computer's interface, will use two distinct addresses: link-local ( FE80 ::) global ( 2000 ::) Currently there are two global prefixes in use (as of writing this post): 200 1  - global addresses 200 2  - 6to4 tunnel (without actually creating a tunnel interface). Let's open  R1 's console and configure IPv6 address
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