Category Archives: Cisco Networking

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Configuring an VMPS server with FreeRadius

Note: this setup is probably the WORST documented peace of Open Source software I have come across and all forums times I have found on it are of people struggling with it. So here goes.. “how do I use Freeradius as … Continue reading

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To configure a freeradius server for a cisco switch with DOT1X

0. First make you have a working FreeRadius server running and all is jolly. For details, see my previous post “To configure a freeradius server for a cisco switch”. 1. On the FreeRadius server, add a Dot1X Port-user in /etc/freeradius/users … Continue reading

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A simple overview of OSPF Area Types

For some reason or another.. I never came across a simple overview of the different OSPF areas. So I made one.. if you like it (or NOT!) feel free to respond. ospf-area-study

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Cisco IOS and Configuration Archiving

If you were under the impression that only Juniper has a nice revision system for archiving configurations… think again and behold a not very well known feature in IOS: configuration archiving…   archiving-notes

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TDR functionality within Cisco IOS high-end Switches

  This document introduces a nice features in IOS that is not very commonly know: a time domain reflectometer functionality on the SwitchPorts! tdr-example-cisco-3560-switch

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A fresh look on Anycast Addressing..

explanation-anycast

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A case study of DHCP snooping and IP Source Guard

dhcp-snooping-and-ip-source-guard-study

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TCPdump compatible traces in IOS

This post will show how to perform LibPcap snooping on IOS devices. Two types of IOS routers (7200 and csr1000v) are covered in the document. tcpdump-on-ios

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VTP v.3 Study

vtp-3-notes

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Prio field STP within the BID of the BPDU

explanation-bpdu-bid-priority-in-pvst-plus

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