Skip to main content

Posts

Showing posts from February, 2007

CCIE LAB TIP 3550/3560

During my practice to the lab exam, i am facing with some new stuff and some memory refreshers. for me as I was explaining before I have been handling mostly voice in the past ~7 years, I would like to give you a tip hopefully it is only a memory refresher When you face with a setup of a new Catalyst 3550/3560 you will face the lab with some layer 3 When you take the Catalyst fresh configuration and you are trying to put under x interface an IP Address you could be facing with this errorBad mask /xx for address x.x.x.xand why!? due to the fact that Cisco do not use the first subnet after subneting the network unless you tell it to.also called subnet zeroso under global config simply put!(config)#ip subnet-zero!and like magic no more Bad mask message.
Ok, now we come to part 2 in the Voice QoS, in the first part we concluded when (I hope) we understand that Voice and QoS need to go together in order to Achieve a good and working env that will allow us to use all our application wisely. Also I have mentioned the wonderful NBAR, let me tell you this is the nicest tool I used in a long time and I am not kidding, what is better then simply Entering under the interface you want to see what is going on ! Interface X ip nbar protocol-discovery ! and poof like magic all your traffic is colored not pain no hassle you can see a table like so: sh ip nbar protocol-discovery stats bit-rate top-n 10 FastEthernet0/0 Input Output Protocol 5 minute bit rate (bps) 5 minute bit rate (bps) ------------------------ ------------------------ ------------------------ http 15000 13000 ssh …
Although I am taking the R&S Lab Exam my vast Experience is mainly i VOIP, I work for ~7 years with VoIP Company's and in the last 5 Years in the same Group Z-Group I have worked in the past years with more then 500 Carriers and with that I believe that I have the privileged to talk about it a little bit. As the Sys Admin in my company I have been loyal to Cisco Class 4 Equipment (mostly AS5300 AS5350 and AS5350XM I have also worked with MG200 AS5400 AS5800 and the small 26xx and 36xx), QoS is one of the major topics in the VoIP env as there is a growing number of Bandwidth Consuming Applications.in my company I am considering the QoS planing and deploying one of the most important part of deploying a successful and friendly VoIP Env. QoS is a way to make your network bandwidth utilization optimized without investing more bandwidth or separate env for voice and data. When you say that your network is full you should consider taking a survey see what is passing trough your net…

SORRY...

it has been a while since my last post as I am getting closer to the exam date my schedule is narrowing and I have a lot of pressure to achieve all my practice goals. I think it is very important mentally to achieve all your practice goals before any exam as you go into the exam you want to be able to say to your self that you did all you can to succeed. So again I apologies and soon I will give you some more notes on my prep