Category: Layer3

IS-IS Cheat Sheet – Part1

is-is-cheat-sheet-Part1-atech-waqas-karim-ccie(4x3)

      IS-IS Routing Protocol Cheat Sheet – Best of CCNA, CCNP, CCIE, Huawei HCNA/E, Juniper JNCIA/P, Nokia NRS1/2,…. Download all Cheatsheets: https://aurumme.com/atech/atech-summary-cheatsheets-ccna/ All Online Quiz: https://aurumme.com/atech/free-online-quiz-interview-questions-atech/ Join our Facebook Group & Page to stay updated with content: https://www.facebook.com/ATechIT1/, https://www.facebook.com/groups/ATechIT/ Stay updated with our YouTube Channel for relevant video: https://www.youtube.com/atechit/  

OSPF Multi-vendor Configuration Cheat Sheet

OSPF Multi-vendor Configuration Cheat Sheet

      OSPF Multi-vendor Configuration Cheat Sheet – Best of CCNA, CCNP, CCIE, Huawei HCNA/E, Juniper JNCIA/P, Nokia NRS1/2,…. Download all Cheatsheets: https://aurumme.com/atech/atech-summary-cheatsheets-ccna/ All Online Quiz: https://aurumme.com/atech/free-online-quiz-interview-questions-atech/ Join our Facebook Group & Page to stay updated with content: https://www.facebook.com/ATechIT1/, https://www.facebook.com/groups/ATechIT/ Stay updated with our YouTube Channel for relevant video: https://www.youtube.com/atechit/  

BGP Local Preference (LOCAL_PREF)

BGP LOCAL_PREF is the Second BGP attribute if we dive deep into BGP’s algorithm of best path selection followed by aggregate (detailed in my first post in BGP section).  When an AS (autonomous system) has multiple routes to another AS, the LOCAL_PREF indicates the degree of preference for one route over the other routes. The route with the highest LOCAL_PREF value is preferred. You can watch the detailed video on LOCAL_PREF on our : LOCAL_PREF, Weight & MED are often confused with each other. LOCAL_PREF is different from Weight & MED. Unlike weight, LOCAL_PREF is not vendor specific (Weight is Cisco Read More …

BGP Weight

BGP Weight is the first BGP attribute if we dive deep into BGP’s algorithm of best path selection followed by Local_Preference & aggregate (detailed in my first post in BGP section). Weight is vendor specific (Cisco proprietary) so it is found only on Cisco routers. Weight is always local on a router and it is not exchanged between BGP routers. The path with the highest weight is always preferred. The range of Weight is 0-65535 and it defaults to 0 always. i.e. The default weight for learned routes is 0 and the default weight for a locally originated route is 32768. We Read More …

Wireshark Operators

Wireshark is the most useful & popular tool for packet Level deep Network Analysis & Troubleshooting. Most importantly, it is open source. It is like a measuring meter or device to find and examine what is going on inside a network cable or port just like a multimeter is used by an electrician to examine what is going on inside an electric cable … but of course at much deeper level. Wireshark or such SW tools are not something very new. Such tools were available in the past as well but they were very expensive and proprietary because they were mostly Read More …