DSCP TOS CoS Precedence conversion
Need to be updated.
QOS on 4500
Show platform hardware qos interface<> tx-queue
show policy-map interface <>
QOS on SUP720
show mls qos int gig <> statistics --------> Does not work on SUP720 .
ip access-group on layer 2 -------> Does not work on SUP720 trunk interface as well.
QOS on SUP2T
By default ,its trust DSCP , Checked and verified in the lab with SUP2T.
Port QOS is disabled on interface if "auto qos default " disabled.
Show queueing interface teng1//1 or gig interface on SUP2T
QOS on 2960/3750
Show mls qos int gig1/0 statistics--------> To check the incoming/outgoing dscp marking and drops and enqued
Show mls qos queuse-set 1 or 2
clear mls qos interface gig1/0 statiscts-----> To clear the mls qos statistics used this command.
mls qos queueu-set output 1 buffer 5 10 80 5
mls qos queueuset- threshold 100 100 100 400 ……….> Two ways to give more buffer 1) assign buffers from others queue or move the the threshold to correct level or increase reserved threshold value or increase the maximum percentage and then adjust the threshold value
make sure to check cos and dscp queue for correct threshold mapping .
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