Maximizing Circuit W/ Two Customers

Unanswered Question
Jul 5th, 2009
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I have a 5Mb/s circuit. I have sublet 2Mb/s. How do I guarantee my sublet their 2Mb/s yet allow me to utilize above 3Mb/s if the sublet isn't using 2Mb/s i.e, WFC, WRED, Priority queing, custom queing, traffic-shaping, rate limit et cetera? My ISP doesn't preserve the TOS bit, right now. What's the best way to do it?

I am using a 3800 series router with current IOS.

Thanks!

Matt

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Joseph W. Doherty Sun, 07/05/2009 - 19:27
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policy-map guarantee


class-map sublet

!you'll need to be able to identify this traffic

!you don't need ToS, can match with ACL

bandwidth 2000


class class-defualt

no fair-queue


interface #

policy-map output guarantee


NB:

Above doesn't limit sublet to 2 Mbps, also doesn't address inbound (inbound best done on other side's outbound).

mlenco Mon, 07/06/2009 - 09:42
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Why isn't the sublet limited to 2 Mb/s if the class-map sets a bandwidth statement to 2000? If the class-default is no fair-queue then what is the queing policy?

Joseph W. Doherty Mon, 07/06/2009 - 09:49
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"Why isn't the sublet limited to 2 Mb/s if the class-map sets a bandwidth statement to 2000?"


Because the class bandwidth statement sets a minimum bandwidth guarantee, not a bandwidth maximum. (NB: if you want to limit the bandwidth, you would need to police or shape it.)


"If the class-default is no fair-queue then what is the queing policy"


FIFO. (NB: reason I suggest no FQ, FQ tends to disrupt class bandwidth guarantees on most IOSs/platforms.)

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