QoS
FattyAcid
MemberMember Posts: 57 ■■□□□□□□□□
I'm about to go take 642-642 (QoS). I used the following to study:
1) Cisco QoS Exam Certification Guide -- awesome book though full of errors unless you get a later printing (I bought the 11th printing!) -- read it twice, studied it for many more hours
2) Cisco QoS Quick Reference Sheets -- pretty good, I think they may be the best of the CCVP series personally
3) 2 x Cisco 2811
4) 1 x Catalyst 2950
5) 1 x Catalyst 3550
Using two different Catalysts real cements the issues of Strict/WRR scheduling configuration.
I feel a little rough on the token bucket stuff--I can get confused as to how they work when its shaping vs. policing. I understand all the concepts, just keeping it all straight is confusing.
1) Cisco QoS Exam Certification Guide -- awesome book though full of errors unless you get a later printing (I bought the 11th printing!) -- read it twice, studied it for many more hours
2) Cisco QoS Quick Reference Sheets -- pretty good, I think they may be the best of the CCVP series personally
3) 2 x Cisco 2811
4) 1 x Catalyst 2950
5) 1 x Catalyst 3550
Using two different Catalysts real cements the issues of Strict/WRR scheduling configuration.
I feel a little rough on the token bucket stuff--I can get confused as to how they work when its shaping vs. policing. I understand all the concepts, just keeping it all straight is confusing.
Comments
I thought the labs, simlets and drag and drop were clear/pretty straightforward. Some of the multiple choice were easy but some were really difficult/unclear. I think I missed several multiple choice but did perfect on the labs, simlets, and drag and drop.
I think I'll do CVOICE next week--I've been studying for it for for a while and just got through my third reading of the Cisco Press Self-Study guide, which like the QoS book, is excellent.
Almost forgot!
6) CBT Nuggets -- I don't think Jeremy did as good of a job with QoS has he did with CVOICE or the old CIPT (only 1/3 or the way through the new CIPT1). The QoS videos are only a total of 7 hours and frankly he just didn't go into enough depth. I watched the CBT Nuggets first and for many topics, I came away confused on a lot of things. His explanation of ECN was also partially incorrect. A good supplement but definitely not a replacement for the book. The video on SAA/RTR was nice though totally irrelevant for the test--I was not even aware of this IOS feature. It took a few moments for me to figure out that it's since been re-branded as SLA and the commands have changed to "ip sla" from "rtr".
Yeah, I am probably going to stall on CIPT2 until the CBT comes out.
I'm going to do CVOICE (next week), CIPT1, and then TUC. TUC is where my real-world experience exists (troubleshooting voice gateways and CUCM, not designing or installing them). CIPT2 covers everything I've never used in the real-world: SRST, extension mobility, device mobility, CUCM PKI stuff, etc.
I expect CVOICE and TUC to be the easiest for me.