Routers queues size..does it mater?

This is a discussion on Routers queues size..does it mater? within the Tech Board forums, part of the Community Boards category; hey all. I am writing a paper about routing. A non-expert work... I handed to my teacher and he gave ...

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    Routers queues size..does it mater?

    hey all.
    I am writing a paper about routing. A non-expert work...
    I handed to my teacher and he gave it back to me, it neads some adjustments...
    When i mention that routers may have different queue size he just asked me: "Why? What do we gain with that policy?"

    I couldn't give him a answer, i didn't know it, in fact i am still looking for it everywhere on the web and i can't find it.
    Can anybody help me please?

    The question is simple:

    Why do routers somtimes have small queues instead of larger onde and vice-versa??


    thank you.

  2. #2
    PC Fixer-Upper Waldo2k2's Avatar
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    well it may not be the exact answer, but as with anything with memory and a processor it's an efficiency equation. If you have a smoking fast processor and a lot of free memory, then a large queue would be an advantage. But if it's a slower model with less ram, a larger queue would take longer to process than a small queue.
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    hey waldo, thx.
    That makes sense, that way things can speed up a litle.
    If anybody has a diferent opinion, any help would be apreciated

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    5|-|1+|-|34|) ober's Avatar
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    I would imagine that it might also have something to do with network traffic and collision control. If you have a small queue, it waits for less time in the queue to be moved on. So the object is to shove it through almost immediately or send a response back saying to try again, so you don't sit there and wait and wait and wait and THEN get a response back that it hasn't gone through yet. Plus, if you're doing throughput calculations, a smaller queue will have a higher throughput over a short amount of time.

    I think there was something in my networking book when I took the class about queue sizes and the fact that there is an optimal size that is set for a queue.... and as waldo said, it all comes back to efficiency and timing.

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    i see...
    by the way....wich network book did you had?
    Maybee i can have a look on it if i can find it on the library or something

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    5|-|1+|-|34|) ober's Avatar
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    I have no idea... that was over 2 years ago and I don't have the book anymore.

  7. #7
    PC Fixer-Upper Waldo2k2's Avatar
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    btw, what kind of routers are you talking about, routers in general, cisco aeronets, etc?
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    Routers in general.

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    I would refer you to www.howstuffworks.com. Maybe it's just because I saw them featuring an articles on routers recently - but they go to a lot of detail and may be able to help with this paper. In any case - it's a really interesting site.

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    i know that site very well but usualy go there just when i need to have the first knowledge about any subject... anyway it impressed me with som much information about routers. But still focus on basic knowledge, it's a comom snse site, it couln't be other way.

    By the way here are some good sites from which i got some good documentation

    www.dataconnection.com
    www.cisco.com (fundamental)

    Any more answers to the mais question on this thread are wellcome and apreciated.

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