Cisco CCNP Data Center Study Guide

posted in: Computer

This is my study plan for the Cisco CCNP Datacenter.

The certification has four exams:

  • 300-175 DCUCI Exam -Unified Computing My 300-175 Study Guide
  • 300-165 DCII Exam -Infrastructure/networking
  • 300-170 DCVAI Exam -Virtual Automation

The above are all required, and either of the below

  • 300-160 DCID Exam -Designing Infrastructure
    or
  • 300-180 DCIT Exam -Troubleshooting

Unfortunately, the exam has recently been updated which makes finding study resources difficult. Actually, it’s a good thing the exam has been updated as the old exam was really out of date and required studying of hardware and software that I defiantly won’t be implementing, even if I do come across them occasionally in my work. So it’s great that I have the opportunity to learn newer technology, but with the downside that there is more limited resources for study.

I signed up for Cisco’s Learning Center Videos, only to find that all the videos are for the old version of the exam, and not really helpful.

I usually like CBT Nuggets, but found that they to only have videos for the previous version of the exam. They do have a post outlining the differences with the new CCNP exam, but nearly a year later still don’t have any new courses.

I haven’t been able to find any guide books, so it looks like I’ll be studying the hard way: Review the exam topics, read the white papers and administration guides, then practice in labs. I generally prefer to have a more structured and efficient way to work towards an exam, but this will probably give me a more through understanding.

DCUCI 300-175 Study Guide

posted in: Computer

This is a plan for studying for the DCUCI exam. It is currently a work in progress, and will be updated as I work through the material. It is mostly to help me stay organized and keep on track, but as there aren’t that many guides for the current version 6.0 of this exam (updated in 2017), I thought I would share this for anyone else to use as a starting point for their own studies.

 

The first place to start of course is with the exam topics. This doesn’t provide that much detail of what is needed to study, but the best place to start is with the administration guides. The exam is based on v2.x, but I am studying on 3.2 as it is the most current and will be most relevant to my real world implementations. Both versions have similar workflows, and I plan to do practice labs in both versions so I will be familiar with both.

Now, for the bulk of reading materials:

Although these guides are very through and contain tons of relevant information, they often provide lots of specific details on how to configure something with every available option, but don’t always include why, or simplified typical scenarios. For that reason, I also plan to also read Implementing Cisco UCS Solutions -Second Edition

I plan to do labs using the Cisco UCS Platform Emulator. I plan to use version 2.2 to prepare for the exam, and version 3.1 while reading the guides and for becoming more familiar with what I typically use at work.

A good (and free) resource for Network Engineers learning about storage: Introduction to Storage Area Networks I may not read this, as my background is with storage and compute infrastructure, but it may be useful for others.

CBT Nuggets are usually a good resource to bring some of the specific concepts together, however they still have not updated the course to for the new version of the exam. It appears that a lot of the course focuses on hardware which is no longer relevant, so I won’t be using CBT Nuggets unless they release a newer version of the course.

Good information from Yuri who has already passed the exam

Quickbooks database manager conflicting with DNS server

posted in: Computer

Here’s a fix I discovered for a problem when running Quickbooks 2016 and DNS on a Windows 2012 server.

Symptoms:

  • Users get the error Error Code: H202 This company file is on another computer, and QuickBooks needs some help connecting.
  • Quickbooks server manager service on the Windows 2012 server is not running.
  • When you run the QuickBooks Database Server Manager, and click Start Scan, it scans the folders, then get an error: Quickbooks network diagnostics failed. Resolve errors and retry.
  • If you try to start the QuickBooksDB26 system service, it starts and then immediately stops, giving the message, “The QuickBooksDB26 service on Local Computer started and then stopped.  Some services stop automatically if they are not in use by other services or programs.”
  • In the Application log on the server this error appears:”The description for Event ID 1 from source SQLANY 16.0 cannot be found. Either the component that raises this event is not installed on your local computer or the installation is corrupted. You can install or repair the component on the local computer.

Cause:

In my case, the quickbooks database server, and DNS server are both using port 55333. If DNS is running first, quickbooks doesn’t choose another available port, but rather stops completely.

Quick Solution:

Stop the DNS Server service, then start the Quickbooks service.

This works, but you will have the same problem after a reboot.

 

Permanent workaround:

Stop the DNS Server service, and the Quickbooks service.

Reserve the port using netsh from the command prompt

netsh int ipv4 add excludedportrange protocol=udp startport=55368 numberofports=5

then start both services

See more info on the netsh command related to this.

More details on the quickbooks forums related to this same problem here

Mikrotik simple sharing with PCQ Queue

posted in: Computer

Mikrotik has a great way to do simple equal sharing of bandwidth using PCQ queues.

Basically it decides the available bandwidth between the active devices.

To make it work you need to define your maximum upload and download bandwidth. Because you can’t really shape traffic that has already arrived at your interface, you need to set your download limit to slightly less than your ISP is actually providing.

 

/queue simple

 

add max-limit=10M/9900k name=internet-queue queue=pcq-upload-default/pcq-download-default target=eth2