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  1. wino burbankmarc's Avatar
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    #51
    Quote Originally Posted by Cyanic View Post
    For most troubleshooting, my best friend is Wireshark. You can do some amazing things with it. It really depends on what you are troubleshooting as any tool used for the wrong task makes it useless. However, if you can become proficient at packet capture analysis then you can troubleshoot just about anything that flies across the network.


    Sorry for the hijack ng2f.
    Yeah I do have SPANs setup around my network connected to machines running wireshark. Handy indeed. Especially when I look at RTP streams.

    Anyways, back to the topic...
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  3. Senior Member Turgon's Avatar
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    #52
    Quote Originally Posted by DevilWAH View Post
    lol and heres me struggling to get more experince in layer 3 and move away from layer 2. sadly so many jobs seem to assume that if you are not experinced at layer 3 no matter how much layer 2 + 4 you have that you don't know networking. personal i love layer 2. and for pinpointing issues and trouble shooting. layer 4 is outstanding. its lovley when the server guys accuse your network of being slow. and 5 min later you can politly explain that not only is it not you net work. butt it is there server x with the issues and what service on that server causing the sow down. at that point 90% of the works done and because you can tell them exactly what and where the problem is its a quick fix... but do they ever thnk you???
    I think the cert tracks and the the technology push is moving people into layer 3 at the expense of layer 2. The IOS is increasingly feature rich at layer 3. A lot of network design these days is to move from 2 to 3. But you still need to know layer 2 very well to do that properly and to understand the issues. At the same time L2 isn't going away and a lot of the cool stuff needs you to understand it very well if interesting things transpire! As for 4, learn it well for reasons you mentioned!
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  4. Senior Member notgoing2fail's Avatar
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    #53
    What the heck does this mean?

    An NSF-capable router supports NSF

    An NSF-aware router does not support NSF but understands it and continues forwarding traffic during SSO.


    I am having a hard time seeing the difference, if you are aware of it, and can continue to forward traffic, then what the heck is the difference between being capable?
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  5. wino burbankmarc's Avatar
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    #54
    Quote Originally Posted by notgoing2fail View Post
    What the heck does this mean?

    An NSF-capable router supports NSF

    An NSF-aware router does not support NSF but understands it and continues forwarding traffic during SSO.


    I am having a hard time seeing the difference, if you are aware of it, and can continue to forward traffic, then what the heck is the difference between being capable?

    This might help
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  6. Senior Member notgoing2fail's Avatar
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    #55
    Quote Originally Posted by burbankmarc View Post
    Thanks, although I've read the link. Skimmed through it...

    I have a general understanding of what NSF/SSO does. I am assuming that this feature is completely done and supported on "NSF/SSO" capable routers.

    I'm just not sure what exactly an "NSF aware" router does exactly? What criteria makes a router NSF aware? Why does it continue to forward data? What is the relationship between aware and capable? Is there a protocol between the two?
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  7. Request timed out. *BB*'s Avatar
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    #56
    Quote Originally Posted by DevilWAH View Post
    Ponder the Network (and other things) you might like that link. all the stuff he missed in the switch cert guide he going to post there.
    Good stuff. Some of the things hes posting as updates are things we just went over on the security exam.
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  8. Senior Member notgoing2fail's Avatar
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    #57
    Just a quick update. Although I haven't given up on CCNP Switch book by David Hucaby, I've taken a little detour to read this book: CCNP: Complete Study Guide

    Amazon.com: CCNP: Complete Study Guide (642-801, 642-811, 642-821, 642-831) (9780782144215): Wade Edwards, Terry Jack…


    I'm only reading the 642-812 part and it's refreshing to come from a non-Cisco Press book. The information seems to have a little more meat, not TOO much but more to quench my thirst. It's helping me to get a perspective and comparison between this book and the CCNP Switch 642-813 AND the BCMSN books that I have. I'm almost done with it as I've spent
    the last 2 days reading it. I should be finished by the weekend, and then be able to get back on board with the CCNP Switch book.

    The author(s) seem to have a pretty good approach to getting their points across. I have used Sybex once in the past. I might be a fan of Sybex books though moving forward now, we'll see.

    Once I can fill in some gaps from the syllabus I am going to give the new SWITCH exam a shot. Preferably within the next 2 weeks....

    I have pre-ordered the CCNP Switch Foundation book, but it won't be arriving fast enough....
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  9. Senior Member notgoing2fail's Avatar
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    #58
    Grrr.....DSCP/COS bits hurting my brain!!!


    AF, EF, IP-Precedence, 3 bit here, 6 bits here....blah blah blah!!!
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  10. wino burbankmarc's Avatar
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    #59
    Quote Originally Posted by notgoing2fail View Post
    Grrr.....DSCP/COS bits hurting my brain!!!


    AF, EF, IP-Precedence, 3 bit here, 6 bits here....blah blah blah!!!

    what I hate about QoS the most is it seems like all the switches do it a little different. Some switches use queue 4 as the strict priority, others queue 1. some have 4 ingress queues, others just have 2. Some use wrr others use srr. Some only support WTD, others don't at all....it's messy.
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  11. Senior Member notgoing2fail's Avatar
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    #60
    Quote Originally Posted by burbankmarc View Post
    what I hate about QoS the most is it seems like all the switches do it a little different. Some switches use queue 4 as the strict priority, others queue 1. some have 4 ingress queues, others just have 2. Some use wrr others use srr. Some only support WTD, others don't at all....it's messy.

    Are you serious? That is sooooo not cool!!!! Sounds like they can't make up their minds....



    But, my book "Cisco LAN Switching Fundamentals" has arrived!


    Let's see what new topics I can learn from it.....starting with... "This is a hub..."
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  12. Senior Member Nuul's Avatar
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    #61
    Quote Originally Posted by notgoing2fail View Post
    Are you serious? That is sooooo not cool!!!! Sounds like they can't make up their minds....
    It's quite annoying. The 3550 and 3560 are this way - one uses wrr the other srr. With the 3560 (IIRC) you can change what queue is the priority queue while it's in the silicon with the 3550. This is the big reason the CCIE training vendors recommend you get at least one 3560 for your lab. The 3550s are just too different on QoS and your exam will use 3560s.
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  13. Senior Member alan2308's Avatar
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    #62
    Quote Originally Posted by notgoing2fail View Post
    Are you serious? That is sooooo not cool!!!! Sounds like they can't make up their minds....
    Some of it comes from their switches originating with different companies that they bought out over the years. Other things, like the 3550/3560 thing Nuul pointed out, I have no idea.
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  14. Senior Member notgoing2fail's Avatar
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    #63
    Quote Originally Posted by alan2308 View Post
    Some of it comes from their switches originating with different companies that they bought out over the years. Other things, like the 3550/3560 thing Nuul pointed out, I have no idea.
    Cisco has been going on an acquisition spree lately. I cringe everytime they buy someone else out because I know down the road, somehow, someway, commands will get confused....


    Quote Originally Posted by Nuul View Post
    It's quite annoying. The 3550 and 3560 are this way - one uses wrr the other srr. With the 3560 (IIRC) you can change what queue is the priority queue while it's in the silicon with the 3550. This is the big reason the CCIE training vendors recommend you get at least one 3560 for your lab. The 3550s are just too different on QoS and your exam will use 3560s.

    Thank you, good information. I have see the "wrr" you speak of when playing with the auto qos command....

    Although I have two 3550's, I'm beginning to feel the really are not as useful as I thought they could be....
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  15. Senior Member notgoing2fail's Avatar
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    #64
    Burnout starting to settle in a bit. After 3 months of endless studying, 10-12 hours a day no weekends off, I'm going to have to schedule this SWITCH exam pretty soon and maybe take a couple days breather. I've been wanting to watch Avatar, I haven't seen it yet.


    It's always good to step away for a bit and come back fresh....like a nice cold shower.....
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  16. wino burbankmarc's Avatar
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    #65
    Quote Originally Posted by notgoing2fail View Post
    Burnout starting to settle in a bit. After 3 months of endless studying, 10-12 hours a day no weekends off, I'm going to have to schedule this SWITCH exam pretty soon and maybe take a couple days breather. I've been wanting to watch Avatar, I haven't seen it yet.


    It's always good to step away for a bit and come back fresh....like a nice cold shower.....
    I'd say finish your SWITCH and take a 2 week breather, stay off the forums, and out of the books and relax.

    I did that between my BSCI and BCMSN but instead of 2 weeks it was like...4 months.
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  17. Senior Member Turgon's Avatar
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    #66
    Quote Originally Posted by notgoing2fail View Post
    Burnout starting to settle in a bit. After 3 months of endless studying, 10-12 hours a day no weekends off, I'm going to have to schedule this SWITCH exam pretty soon and maybe take a couple days breather. I've been wanting to watch Avatar, I haven't seen it yet.


    It's always good to step away for a bit and come back fresh....like a nice cold shower.....
    10 - 12 hours a day and no weekends off? Are you not holding a job down simultaneously? Even so beware of over cooking the studies. Learn what you can steadily and roll with the rest. Some things take time to incubate anyway! Beware of burnout, it can be very hard to return to studies if that happens.
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  18. Senior Member notgoing2fail's Avatar
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    #67
    Quote Originally Posted by burbankmarc View Post
    I'd say finish your SWITCH and take a 2 week breather, stay off the forums, and out of the books and relax.

    I did that between my BSCI and BCMSN but instead of 2 weeks it was like...4 months.

    Yes, I'm pushing myself to cram as much info as I can to take the exam. My SWITCH foundation book hasn't even come in yet, but I've been reading a lot of Cisco online docs on parts that I had questions about like PPDIOO, etherchannel, HSRP.

    I absolutely need a breather and I think it sounds like a good idea to step away from everything, including the forums. Just get away, get some air and sunshine....


    Quote Originally Posted by Turgon View Post
    10 - 12 hours a day and no weekends off? Are you not holding a job down simultaneously? Even so beware of over cooking the studies. Learn what you can steadily and roll with the rest. Some things take time to incubate anyway! Beware of burnout, it can be very hard to return to studies if that happens.

    I have been studying non-stop since March. Literally 10-12 hours a day. Anyone that wants to check my account here, can see that I'm literally posting all throughout the day and night as well as various blogs, so it can be verified.

    I'm not holding a job currently which is allowing me to put in all these hours. Conservatively that's about 70 hours or so a week, 280 hours or so a month.

    As long as I'm not working, I'm studying. There's no excuse not to. I do take breaks here and there, maybe watch a little TV, but honestly, not really that much. I'm so hungry for Cisco knowledge it's become a little OCD.

    But it's not healthy either to be in a Cisco cave, so I'm praying, absolutely praying that I pass this new SWITCH exam so I can take a 1-2 week breather and then get back on the saddle.

    Or look for a job!!
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    #68
    Quote Originally Posted by notgoing2fail View Post
    But, my book "Cisco LAN Switching Fundamentals" has arrived!
    I am planning to buy this as well. Let me know if this is any good.
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  20. Senior Member notgoing2fail's Avatar
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    #69
    Quote Originally Posted by zerglings View Post
    I am planning to buy this as well. Let me know if this is any good.


    So far I'd recommend it. I'm almost done with it and I've documented my thoughts per chapter.... I'm going to be posting per chapter review when I'm done....
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  21. Senior Member Geetar28's Avatar
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    #70

    Default You da man..

    Quote Originally Posted by notgoing2fail View Post

    But, my book "Cisco LAN Switching Fundamentals" has arrived!
    Quote Originally Posted by notgoing2fail View Post
    So far I'd recommend it. I'm almost done with it and I've documented my thoughts per chapter.... I'm going to be posting per chapter review when I'm done....

    I've got this one on the way too..interested in your take on it. But dude, you said it arrived two days ago...and yer almost done?? Have you taken a speed reading course??? Or maybe a 44oz Jolt??

    I thought I was doing good by being on chapter 5 of Chappell's Wireshark book I got last week. Your tearing it up though!!!

    Man, I know that your really wanting to tackle the Switch exam...but you know you gotta pace your studies too..it's not gonna kill you to take a day maybe even a weekend off bro. I think you know your about to hit burnout if you haven't already, and if you do it will take more than a day or two to get your head/heart back in the game.. Take care.
    Last edited by Geetar28; 06-05-2010 at 11:39 PM.
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  22. Senior Member notgoing2fail's Avatar
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    #71
    Quote Originally Posted by Geetar28 View Post
    I've got this one on the way too..interested in your take on it. But dude, you said it arrived two days ago...and yer almost done?? Have you taken a speed reading course??? Or maybe a 44oz Jolt??

    I thought I was doing good by being on chapter 5 of Chappell's Wireshark book I got last week. Your tearing it up though!!!

    Man, I know that your really wanting to tackle the Switch exam...but you know you gotta pace your studies too..it's not gonna kill you to take a day maybe even a weekend off bro. I think you know your about to hit burnout if you haven't already, and if you do it will take more than a day or two to get your head/heart back in the game.. Take care.

    I've got pretty good at reading lately. I guess when you practice it enough it gets easier.

    I've always been kind of a slow reader in that I have to read things a couple times over to make sure I really get it. But now it's coming to me easier.

    Also, it has a lot of the same rehashed topics from many other books.


    One thing I warn you though is that it does talk a lot about CatOS, which is kinda nerving. I'm not entirely sure why the authors spend so much time on a soon to be dead OS.

    If they really wanted to talk about CatOS, then they should have called it CatOS Fundamentals....
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    #72
    Quote Originally Posted by notgoing2fail View Post
    So far I'd recommend it. I'm almost done with it and I've documented my thoughts per chapter.... I'm going to be posting per chapter review when I'm done....
    Quote Originally Posted by notgoing2fail View Post
    One thing I warn you though is that it does talk a lot about CatOS, which is kinda nerving. I'm not entirely sure why the authors spend so much time on a soon to be dead OS.

    If they really wanted to talk about CatOS, then they should have called it CatOS Fundamentals....
    Okay, I'll wait for your review.

    I support some sites that have quite a few switches with CatOS but we're in the process of refreshing some of these sites. But most, if not all, companies have a tight budget so I doubt that the hundred thousands of dollars budget will be approved anytime soon.
    Last edited by zerglings; 06-06-2010 at 06:01 PM.
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  24. Senior Member Turgon's Avatar
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    #73
    Quote Originally Posted by notgoing2fail View Post
    I've got pretty good at reading lately. I guess when you practice it enough it gets easier.

    I've always been kind of a slow reader in that I have to read things a couple times over to make sure I really get it. But now it's coming to me easier.

    Also, it has a lot of the same rehashed topics from many other books.


    One thing I warn you though is that it does talk a lot about CatOS, which is kinda nerving. I'm not entirely sure why the authors spend so much time on a soon to be dead OS.

    If they really wanted to talk about CatOS, then they should have called it CatOS Fundamentals....
    Sounds like your making progress. Just be careful of overdoing the speed reading. Once you understand the state machine and protocol mechanics of a protocol to the best of your current ability then you are done with the chapter. That can take time to sink in. You will still find CatOS lurking in datacenters. I believe it's a throwback to the Catalyst acquisitions in the late nineties.
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  25. Senior Member thenjduke's Avatar
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    #74
    I been following your thread and I think it is official that I am starting the CCNP track as well. I bought the books and getting my gear together. I started to watch some of CBT Nuggets and reading the material. I am going to do a thread as well.
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  26. Senior Member notgoing2fail's Avatar
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    #75
    Quote Originally Posted by zerglings View Post
    Okay, I'll wait for your review.

    I support some sites that have quite a few switches with CatOS but we're in the process of refreshing some these sites. But most, if not all, companies have a tight budget so I doubt that the hundred thousands of dollars budget will be approved anytime soon.

    It would be interesting to know how many companies are using CatOS still. I'm sure they are still out there as Turgon mentioned. But I'm also sure they must be dwindling in numbers!!


    Quote Originally Posted by Turgon View Post
    Sounds like your making progress. Just be careful of overdoing the speed reading. Once you understand the state machine and protocol mechanics of a protocol to the best of your current ability then you are done with the chapter. That can take time to sink in. You will still find CatOS lurking in datacenters. I believe it's a throwback to the Catalyst acquisitions in the late nineties.

    So true. I'm also very eager, and I have to control that side of me. It's more of a waste of time to read fast solely for the purpose of reading fast and not absorb anything....

    I kinda took a slight break this weekend and just casually surfed the boards and watched some TV. I'm thinking maybe weekends should be used for down time to avoid burnout...


    Quote Originally Posted by thenjduke View Post
    I been following your thread and I think it is official that I am starting the CCNP track as well. I bought the books and getting my gear together. I started to watch some of CBT Nuggets and reading the material. I am going to do a thread as well.
    Excellent I'll take a look at your thread!
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