Posts in 2013
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RIP Irregularities: Authentication, Updates: Uni-cast vs Multicast vs Broadcast
Thursday, April 25, 2013 in Cisco Networking
RIP (IPv4 versions) is a bit obsolete, I know, and very few production environments will use it as a “routing protocol of choice”, but it´s also quite simple and there is simply no excuse for a Network Engineer to not know it in smallest …
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Top Interview Questions for Network Engineers, Part 2
Wednesday, April 24, 2013 in Cisco Networking
The continuation of the previous post, stolen from router-switch.com Blog Q51. What are the data units at different layers of the TCP / IP protocol site? Ans. The data unit created at the application layer is called a message, at the transport layer …
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Top Interview Questions for Network Engineers, Part 1
Wednesday, April 24, 2013 in Cisco Networking
This was originally posted by another blog, router-switch.com and I must say that agree only partially. Some questions are too deep, but not related to Networks exactly, but more to the Systems part, while the purely Networking questions are not so …
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frame relay "map" vs "interface-dlci" and "Inverse ARP"
Friday, April 19, 2013 in Cisco Networking
I remember when I was first getting into Frame Relay I had much trouble getting the concept of DLCIs, LMIs and how it all works, because it´s so much different then other L2-L3 protocols. It took me a while to realize that the concept is quite …
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CCIE: Preparation Schedule
Saturday, April 13, 2013 in Cisco Networking
So, you wanna be a CCIE? It’s true, I’ve read millions of how-to stories. Ok, maybe not millions, cause there are currently like 17k R&S CCIEs in the world, but… a lot! Three of us made a detailed plan how to become CCIEs until …
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Narbik in web-iou
Friday, April 12, 2013 in Cisco Networking
Narbik Topology for web-iou Disclaimer: I DON’T OWN NOR HAVE AN ACCESS TO THE TOPOLOGY, INITIAL CONFIGS, IOU/IOL BINARIES OR ANY OTHER MATERIAL UNDER CCIE EXAM, NARBIK OR COPYRIGHTED FROM CISCO OR ANY OTHER VENDOR. This tutorial is for those who: - …
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IOS IPS (Intrusion Prevention System)
Friday, March 08, 2013 in Cisco Networking
Cisco Docs: Secure DATA PLANE>Security Configuration Guide:Cisco IOS Intrusion Prevention System http://www.cisco.com/en/US/docs/ios-xml/ios/sec_data_ios_ips/configuration/12-4t/sec-data-ios-ips-12-4t-book.html IPS is watching packets and sessions …
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OSPF: area range v.s. summary address
Wednesday, February 20, 2013 in Cisco Networking
This will be a short post, because the topic is rather simple. So… why an entire post dedicated to something as simple as this? Well, because a lot of people are confused by it, and I myself have had an issue a few days ago where I used the …
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QoS Part II: Congestion Management, Traffic Policing and Shaping
Friday, January 25, 2013 in Cisco Networking
When we are talking about the QoS Congestion Management and Avoidance, the three most important terms are: queuing, dropping and scheduling. Queuing places the packets into the different software queues based on the QoS labels. After the traffic is …
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Cisco WAAS Part II: Configuration
Thursday, January 17, 2013 in Cisco Networking
Cisco WAAS Part II: Configuration There are a few things we need to know before we configure our traffic to utilize the WAAS: - - The protocol WAAS uses is called WCCP (Web Cache Coordination Protocol) - - 61 and 62are the Service Identifier Numbers …