Configured Gatekeeper's for the First Time

I finally did something that I was dreading to do for a long time...configure a H.323 Gatekeeper. It wasn't to bad but I will need to lab it again before the test I'm sure. There's just a slew of commands to remember to get everything up and working properly between the endpoint and gatekeeper. Even the instructor in VOD I was following along with was having issues getting everything up and running. He spent about 25 minutes troubleshooting what turned out to be a codec mismatch issue between dial-peers on two different gateways lol.

I'm having this weird intermittent call issue with my gatekeeper and phones though, I wonder if it has something to do with the voice-class codec I have configured but I may be wrong.

Always Troubleshoot the Obvious

I wasted 90 minutes in today's lab troubleshooting an issue that the IOS told me might cause the issue to begin with. I upgraded my 2821 lab routes to a newer IOS 15 version so that I can lab some Gatekeeper scenarios. I knew about this problem in the past but by default, the newer IOS versions (at least voice specific) enables a configuration to prevent Toll-Fraud. It's called ip address trust authenticate which requires that all IP addresses that attempt to place calls to a gateway be added to a list that allows the call to be place.

Now while I knew about this I figured it wasn't enabled since I already had configured my router and looking in my running-config this command was no where to be found. I went ahead and issued the no ip address trust authenticate command under the voice service voip configuration and sure enough I could place H.323 calls again.

Prepping Hardware and Software for CIPT1

While I'm preparing to schedule my test for CVoice and hoping for a first time pass; I'm also getting my ESXi server ready for CIPT1. I already have the domain controller installed along with the CUCM 8.5 Publisher server. I'm hoping that I have enough time today to get the CUCM Subscriber started. I will say that it's very tricky getting CUCM install up and going and it's quick to error out if your system doesn't meet it's "hardware requirements"; at least in VMware.

I used the following template settings to get this to work:

Linux Red Hat (32-bit)
1 Virtual Processor
2 GB RAM
80 GB Hard drive (SAS 0:0)

I believe it's picky about both the OS settings and the hard drive settings the most. Once the Publisher was up and running I took a snapshot, shut her down, decreased the memory to 1 GB and booted her back up. Cisco gave an error message about them not being responsible for me not using the recommended equipment but it booted right up!

Download My Mnemosyne Flash Cards for CVoice

I uploaded my Mnemosyne Flash Cards for CVoice on the infamous techexams.net forum. You can grab it here if you're interested:

Shawn's CVoice Mnemosyne's

As mentioned you'll have to rename the PDF extension to XML and then import it into the Mnemosyne program in order for this to work.

QoS Policing and Configuration

Well I'm nearing the end of the very last chapter of CVoice and after this week everything I study will be review until the test date which I haven't scheduled quite yet. I still have about 20 hours worth of CVoice video material I'm going to go through along with a review guide along with my Mnemosyne before I schedule the test and plunk down $150 bucks.

The last chapter was QoS Policing and configuration which wasn't quite as dreadful as I thought it was going to be. I think that's mainly because there's not a lot of detail you can put into 1-2 chapters compared to the previous CCVP which had a whole book and exam dedicated towards it! The picture above shows one of the token bucket configurations used in CIR (Committed information Rate) when trying to manage/police data traffic sent from CPE to the LEC.

There have been a lack of updates on the blog due to the crazy dead lines and traveling that I've been doing as of late. Sometimes I don't really get to study until 8pm or so which leaves me a dead tired (too lazy) to post a topic. I'm still at it though and I plan on keeping at the pace I'm at throughout the rest of this year unless life happens, which it usually does.

About Ready to take the CVoice Test

I'm away from home still so I haven't been able to study like I want; however I've been watching IPExpert videos and finishing up the last few chapters in the Cvoice book. When I get home next week, I will finish up the last QoS chapter, and then start reviewing preparing on my first take on my path to CCNP: Voice

Configuring Digit Manipulation

Spent about 3-4 hours labbing many different call routing scenarios and testing out as many technologies as I can. Along with cleaning up and configuring some high availability scenarios between both my HQ and Branch site in case the WAN goes down. I also setup correct caller-id information over PSTN so instead of just sending out the extension CLID (Caller-id) info it prefixes the area code and CO code as well.

Tomorrow will be another long session, going to deep dive into TEHO, site-codes, Toll-Free Bypass, and if I have time basic over of Class of Restriction (COR) but I'm betting I'll be worn out by time I get to that section.

I want to knock out the rest of this chapter before my employer ships me out to Houston, TX to begin provisioning our new remote DR site. I'll be out there for at least two weeks and I'm afraid I'm going to loose momentum if I can't get good lab time in so I want to get to the upcoming theory chapters ASAP. Thankfully I'll have plenty of IPExpert videos to go through and if I time it right I should be able to complete the Gatekeeper and first QoS chapter while I'm away.