CBWFQ

[paublo]

Hi i just have a quick question which im not too sure about, i have a fast ethernet doing cbwfq that has 5000kb of available bandwidth. does this mean the my queues will share this bandwidth? as im only using 70% of the total bandwidth leaving me 5000kd as available.

Policy Map queueing_policy
Class voip_traffic
Strict Priority
Bandwidth 20 (%)
set dscp ef
Class voip_signal
Bandwidth 5 (%) Max Threshold 64 (packets)
Class class-default
Bandwidth 45 (%)
exponential weight 9
class min-threshold max-threshold

Input queue: 0/85/184/97138 (size/max/drops/flushes); Total output drops: 0
Queueing strategy: Class-based queueing
Output queue: 0/1000/64/0 (size/max total/threshold/drops)
Conversations 0/2/256 (active/max active/max total)
Reserved Conversations 2/2 (allocated/max allocated)
Available Bandwidth 5000 kilobits/sec

 

[unclerico]

remember, qos really only comes into play when congestion occurs. if you had shaping or policing going on then you would constrain total bandwidth usage to what you state.

I hate all Uppercase... I don't want my groups to seem angry at me all the time! =)
- ColdFlame (vbscript forum)

 

[paublo]

unclerico, i understand this but in a time of congestion will the classes i have defined use the extra available bandwidth. I'm assuming yes.

 

[Quadratic]

Yes. If you're just defining guaranteed bandwidth percentages, the remaining can still be used. If you're policing or shaping your queues, though, then you can't use any of the extra bandwidth beyond what you've policed it to.

CCNP, CCDP

 

[unclerico]

when you define your bandwidth percentages or bandwidth in bps, with the exception of priority queuing, you are reserving a MINIMUM amount of bandwidth in time of congestion. with priority queuing you are defining a minimum and a maximum. as quadratic said, if you have bandwidth available then it can and will be used

I hate all Uppercase... I don't want my groups to seem angry at me all the time! =)
- ColdFlame (vbscript forum)

 

[paublo]

that's what i figured thanks guys.