Category Archives: Uncategorized

NetNORAD – Facebook TSHOOT tool

Interesting read and video about NetNORAD – a tool used by facebook to detect and isolate network latency/packet drop issues. https://code.facebook.com/posts/1534350660228025/netnorad-troubleshooting-networks-via-end-to-end-probing/   Additional reads: https://github.com/facebook/fbtracert https://github.com/facebook/UdpPinger

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Accessing HomePC from Anywhere[without traffic passing through a third-party app]

Create a free account with a Dynamic DNS service like noip.com and configure it in the modem. This step is to link dynamically assigned IP from your service provider to a static name. Install any remote sharing app like VNC … Continue reading

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Configuring Qlogic CNA for FCoE on an ESXi Host

This article is about how to¬†configure FCoE functionality on Qlogic CNA card-QL8262 installed on a Dell PowerEdge R720 server running ESXi 5.5. QL8262 is dual port CNA card that supports LAN, iSCSI and FCoE. Configuring Qlogic FCoE card on an … Continue reading

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TCP-IP

Five layers of TCP-IP protocol are; Physical layer : deals with how bits are identified and transmitted, voltage values etc Data-link layer: how the device on medium is identified and how it is accessed or shared and how the frame … Continue reading

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Articles on MPLS VPN/TE from NILs’ Wiki

http://wiki.nil.com/Category:MPLS

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Basic of LDP

Label Distribution Protocol; LSR sends LDP hello message with Destination IP= 224.0.0.2 and Src/Des UPD port = 646, once “mpls ip” command is enabled on an interface. This process is called “Discovery” Hello messages will be sent every 5 secs … Continue reading

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Study List for MPLS Exam

MPLS Fundamentals MPLS and VPN Architectures volume-1 MPLS and VPN Architectures volume-2 MPLS related RFCs Recap of BGP from; Routing TCP/IP, Volume II Internet Routing Architecture

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