CCIE Data Center Online Resources and Reading List

Sep 4, 2015
CCIE, Certificate, Reading List

Install, Config and Troubleshoot Guides Install, Config and Troubleshoot Guide for Cisco Nexus 7000 NXOS Switch Install, Config and Troubleshoot Guide for Cisco Nexus 5000 NXOS Switch Install, Config Guide for Cisco Nexus 2000 NXOS SwitchInstall, Configure and Troubleshoot Guide for Cisco Nexus 1000v NXOS Virtual SwitchInstall, Config and Troubleshoot Guide for Cisco MDS SAN NXOS SwitchInstall, Config and Troubleshoot Guide for Cisco ACE 4710 ApplianceCisco NX-OS FCoE Configuration Guide for Nexus 7000 and MDS 9500Install, Config and Troubleshoot guide for Cisco UCS ManagerInstall and Config Guide for Data Center Network Manager (DCNM) Configuration examplesCisco Nexus 7000 NXOS Config ExamplesCisco Nexus 5000 NXOS Config ExamplesCisco Nexus 1000v NXOS Config ExamplesCisco MDS SAN Switches NXOS Config ExamplesCisco UCS Manager Config Examples White Papers and Other Useful Online ResourcesCisco Product Support Documentation a central repository for all Cisco Documentation (by product or technology) - formerly known as Documentation CD, or CCO Documentation. ...

Walkthrough of CheckIO Inside Block

Sep 4, 2015
python, CheckIO

After a long absence, I returned to continue playing CheckIO tasks by a notification mail. The UI had been optimized a lot and the tasks were still as interesting as the before. Inside Block required checking whether a given point is inside a polygon or not. After some research on google, I found a practical method. How to check if a given point is in a polygon Given a polygon and a point ‘p’, find if ‘p’ lies inside the polygon or not. ...

The number of management nodes is important, take it into your consideration

Aug 1, 2015

The reason behind why I almost instantly became a big fan of Cisco FEX and satellite card technology is that, both of them provide tremendous complexity reduction in many aspects, like planning, managing, deploying and even the knowledge requirements for engineers. I think no one would argue that there are a lot of great tools from CLI to GUI or whole sets of applications can improve the engineer’s work effectiveness and efficiency. ...

What is hot/cold aisle in data center

Jun 25, 2015
Data Center

A hot/cold aisle is a layout design for server racks in a data center. The goal of it is to increase the effectiveness of the cooling system by managing airflow in a data center. In the simplest form, this design involves lining up server racks in different rows with cold air facing one way and hot exhausts facing the other. Typically, cold aisles, which are usually composed of rack fronts, face AC output, and hot aisles face return ducts. ...

NO-NAT configuration on Cisco ASA Firewall

Jan 28, 2015
ASA, Cisco, Firewall

Cisco ASA firewall has upgraded its command line at the version 8.3 and changed a lot of configurations from their previous style. I recently faced two cases about NO-NAT in both version and want to leave a quick note here. Example details: inside IP address: outside IP address: traffic go through from inside interface to outside interface Before 8.3 An access-list is needed to filter the interested traffic. ...

Copy/Paste in Quick Look on MacOS

Jan 27, 2015
MacOS, Preview

Quick Look, which is triggered by tapping space bar, of Mac OS system is the first feature that has impressed me since I switched from Windows to Mac years ago. This feature has saved me uncountable time for my from opening applications to open a file. Here is how to do copy/paste in quick look if you want to make it more powerful: But the default setting does’t allow you to select the quick looked file. ...

Tsukkomi about Chinese Cable SP Providers

Jan 13, 2015
ISP, networking

Companies usually take experiences from others in the same industry or the ones share a lot of characters. This is also similar to Chinese companies in cable SPs. Every time I heard about what they wanted to learn from when we were discussing future business development, Comcast is always the one they like. But from my personal view, I prefer to consider this is an error to position themselves like Comcast because there are no share characteristics except for being called cable SPs. ...

Huawei is abandoning CDN

Sep 15, 2014
Huawei, CDN

Companies drop their products while they are benefit-able, it seems that Huawei is abandoning CDN from its mainstream products in China. Lacking of clients may be one critical fact that this product cannot provide sufficient profit for Huawei. From this aspect of how many new clients a product has been sold while no expansion for old clients, the only considerable one is China Mobile Sichuan. Less R&D force for less profitable product principle makes CDN have less support. ...

CCIE Data Center Lab Exam Topics

Jul 6, 2014
CCIE, Certificate, Data Center

The CCIE Data Center lab exam topics provided are general guidelines for the content likely to be included on the lab exam. However, other related topics may also appear on any specific delivery of the exam. In order to better reflect the contents of the exam and for clarity purposes, the guidelines below may change at any time without notice. Cisco Data Center Infrastructure - NXOS Implement NXOS L2 functionality ...

Different Orientation of Wasu

Jun 8, 2014

As I mentioned in my earlier post, regional government media groups were chasing for profits in SP business. But glad to say, not all of them shared the same goal. A minority of them noticed their advantages and disadvantages and chose to orient to the content providers. Wasu is one of the minority group members, and it has a totally different business orientation with other three strongest MG in China. ...