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Perl Script For Subtitle Conversion
This has nothing to do with Unified Communications. But I don't have another blog for video editing. Thus I post it here for anyone who needs it.I've been using SVDTS plugin for Sony Vegas Pro to...
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Enterprise Licence Manager
Since from UCM 9.0, Cisco introduced ELM (Enterprise License Manager). Instead of putting license files on UCM, CUC servers, now you put license files on a "License Server" (ELM).This is similar to...
View ArticleCorrection to the Cisco UC rooting process
I got a lot of feedback regarding the problem after rooting Cisco UC products (CUCM/UCCX, etc.). The symptom was that every service is in [STARTING] state and you get 'Database Communication Error'...
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Running UC Labs on a laptop
Not everyone has the luxury of running a Cisco UCS server at home. Even if you do, it's a little bit heavy to drag the UCS around. It would be convenient to have the UC lab built on your laptop.I...
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IOU Web
Lately I had to recreate a MPLS network. I used to use GNS3 as it's user friendly and can use vanilla IOS (i.e. you may download IOS from cisco.com and throw it into GNS3). GNS3 can also emulate...
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Build a $30 Wireless Lab
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 need at least two things - a WLC (Wireless LAN Controller) and...
View ArticlePut a text file on router flash without file transfer
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 'regular' way is to use TFTP/FTP to transfer the file. But it could...
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Network Engineer Should Know A Little Bit Scripting and Excel
I was working on a network migration project for a large enterprise. They are migrating their Catalyst 6509 network to Nexus (7ks, 5ks, 2ks).Part of the migration is to move hundreds (if not...
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UC 10.5, ESXi 5.5U2, DL380 G5
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) Upgrade the server (MCS7845-H2 a.k.a. HP DL380 G5) BIOS and...
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"Cloud" device in IOU Web
I've been using IOU Web for network emulation."Cloud" device is the bridge between internal devices (such as routers within IOU) and external devices (such as PCs, a real/virtual router outside of IOU,...
View ArticleESXi 5.5 support for CSR 10.5
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 lovely VMware "pink screen" (Pink Screen Of Dead). Consistent high CPU...
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IOU, GNS3, Cisco VIRL/CML
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 actually a front end add-on to DynamIP - which is the real...
View ArticleESXi 6.0 on HP DL380 G5
Just upgraded ESXi from 5.5 to 6.0 on my HP DL380 G5 with the "HP Custom Image". Thought it'd work better than the "vanilla" (generic) image.The install went well. But from time to time, it kept...
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New book - Deploying Cisco Unified Contact Center Express
Back in 2006 I was a Cisco TAC engineer supporting Contact Center Express (a.k.a. IPCC Express, CRA, CRS, IPIVR, now known as CCX). Information is so scarce that even TAC engineers joked it was...
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Cisco IOS AAA Configuration with ISE
I was trying to set up a POC (Proof Of Concept) lab to use Cisco ISE as AAA server.IMHO, a good configuration example should meet the following:1) MinimalNo one wants to read a 300-line example. A...
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Finally TACACS on ISE
Cisco has been persuading people migrate ACS to ISE. However one of the hold-backs is ISE's lack of TACACS support. ISE 2.0 finally supports TACACS. This article is to demonstrate a "barebone"...
View ArticleQoS Test Tool on Windows 7 (or above)
The HuntI was trying to find a packet generator for my customer. Customer wants to run the packet generator on Windows 7 (or Windows 10) to mark DSCP on outgoing packets. So he can test QoS policies...
View ArticleIP Calculator Functions for Spreadsheet
Spreadsheet (e.g. Microsoft Excel) is a very powerful tool for network engineers. I use spreadsheet to build network configuration scripts, especially for large scale deployment/migration. For...
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How to power Escort 9500ix with USB
This is is not related to IT but I feel like sharing it. :)I have an Escort 9500ix radar detector which is powered by 12v RJ-11 connector. The stock power cord looks like below:When I go travel, I...
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Bypass CUCM/Unity hardware check
I was trying to install the UC 8.6.1 suite on my VMware ESXi. I'm pretty savvy at VMware and UC, thus I didn't bother to download the OVA template from Cisco. I created a VM with 75G hard drive and...
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