07-05-2009 05:05 PM - edited 03-04-2019 05:19 AM
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
07-05-2009 07:27 PM
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).
07-06-2009 09:42 AM
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?
07-06-2009 09:49 AM
"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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