Saturday, April 4, 2015

IOU, GNS3, Cisco VIRL/CML

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GNS3 is a well known network emulator software.  Many people compare it with IOU, which is not quite an apple-to-apple compare. GNS3 is ac...
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Friday, October 24, 2014

ESXi 5.5 support for CSR 10.5

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I've been testing CSR 10.5 (UCM 10.5, UCCX 10.5) on ESXi 5.5 U2. I kept running into problems I've never seen before, such as the ...
Tuesday, September 30, 2014

"Cloud" device in IOU Web

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I've been using IOU Web for network emulation. "Cloud" device is the bridge between internal devices (such as routers within...
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Tuesday, September 23, 2014

UC 10.5, ESXi 5.5U2, DL380 G5

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My home lab has been collecting dust for a while.  During the weekend, I wanted to refresh it with the latest and greatest, which means: 1...
Monday, August 11, 2014

Network Engineer Should Know A Little Bit Scripting and Excel

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I was working on a network migration project for a large enterprise.  They are migrating their Catalyst 6509 network to Nexus (7ks, 5ks, 2ks...
1 comment:
Monday, June 9, 2014

Put a text file on router flash without file transfer

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Say, you want to put a text-based file on a router's flash memory.  It could be a license file, a config file, or some scripts. The ...
Thursday, March 6, 2014

Build a $30 Wireless Lab

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One of the recent project has quite a lot wireless LAN stuff.  So I feel the urge to build a home lab. To build a wireless LAN lab, you ne...
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