09-05-2008 08:13 AM - edited 03-06-2019 01:12 AM
hi all ,
is it possible to guarantee a min bandwidth for some flows on 3750 if there is no congestion on the link ?
i mean , my customer is rate limited to 40MB by provider (for all traffic),the 3750 uplink to provider is a giga port
he would like to guarantee min 10 mb (not max)to a network and min 5 mb (not max)to another ( on output direction) uplink port.
At max there will be 40MB and no congestion on uplink port,in such case does cmde srr-queue bandwidth share a b c d apply ?
2nd ) do a b c d are percent of bandwidth cmde under interf or speed link ?
if i use the following conf
int gi x/y
speed 100 (limit speed link to 100M)
bandwidth 40000
srr-queue bandwidth limit 40 (40Mb max)
srr-queue bandwidth share 2 1 2 5
will i have 8MB queue 1 and 4Mb q2 guaranty but not limited to ?
thanks for help
09-05-2008 09:22 AM
Hi.
Yes, that makes sense. The command 'srr-queue bandwidth limit' will actually limit your port to 40% tho, hope that's what you want?
The 'srr-queue bandwidth share' command will guarantee that bandwidth but not limit it to it. (the command 'srr-queue bandwidth shape' is the one that does that)
Simon
09-05-2008 04:41 PM
If the port is running at gig, then you'll need to limit to 4%; 40% for running at 100 Mbps. (I also recall, the 3750 limits are not precise, you may need to first experiment to find what % values allows the fastest rate without exceeding your 40 Mbps.)
I haven't worked the number for your share command, but depending on number of queues, you'll need to insure queue ratios provide for the 5 and 10 Mbps you want to reserve.
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