ACE 4710 resource allocation issue

[riziv]

Hello,

We are having the following resource configuration on our cisco ACE 4710 appliance with a default license of 1Gbps bandwidth.

lb1/Admin# sh run resource-class

Generating configuration....

resource-class Admin-RC
  limit-resource all minimum 15.00 maximum unlimited
resource-class ON-DP-LOADBAL-RC
  limit-resource all minimum 15.00 maximum unlimited
resource-class ON-DT-LOADBAL-RC
  limit-resource all minimum 2.50 maximum unlimited
resource-class ON-DV-LOADBAL-RC
  limit-resource all minimum 2.50 maximum unlimited
resource-class ON-IP-LOADBAL-RC
  limit-resource all minimum 5.00 maximum unlimited
resource-class ON-IT-L0ADBAL-RC
  limit-resource all minimum 2.50 maximum unlimited
resource-class ON-IV-L0ADBAL-RC
  limit-resource all minimum 2.50 maximum unlimited
resource-class application-RC
  limit-resource all minimum 15.00 maximum unlimited
resource-class presentation-RC
  limit-resource all minimum 15.00 maximum unlimited
resource-class proxyisa-RC
  limit-resource all minimum 15.00 maximum unlimited

We are using on resource-class per context.

We have a default license of 1Gbps bandwith and I see that the maximum values displayed by " show resource-usage" does not correspond to 1Gbps license and is higher than excepted: 

lb1/Admin# sh resource usage resource rate mgmt-traffic
                                                     Allocation
        Resource         Current       Peak        Min        Max       Denied
-------------------------------------------------------------------------------
Context: Admin
    mgmt-traffic rate         380      37174    1250000  125000000          0
Context: ON-DP-LOADBAL
    mgmt-traffic rate       12912      78063          0  123750000          0
Context: ON-DT-LOADBAL
    mgmt-traffic rate          96      52237          0  123750000          0
Context: ON-DV-LOADBAL
    mgmt-traffic rate       12818      52436          0  123750000          0
Context: ON-IP-LOADBAL
    mgmt-traffic rate         585       3803          0  123750000          0
Context: ON-IT-LOADBAL
    mgmt-traffic rate        1418      24836          0  123750000          0
Context: ON-IV-LOADBAL
    mgmt-traffic rate           0       6595          0  123750000          0
Context: application
    mgmt-traffic rate        5032      25604          0  123750000          0
Context: presentation
    mgmt-traffic rate           0       1722          0  123750000          0
Context: proxyisa
    mgmt-traffic rate        6379      47712          0  123750000          0


lb1/Admin# sh resource usage resource rate bandwidth
                                                     Allocation
        Resource         Current       Peak        Min        Max       Denied
-------------------------------------------------------------------------------
Context: Admin
  bandwidth                   612      38470   21062500  157187500          0
Context: ON-DP-LOADBAL
  bandwidth                 25937   31015563   18562500  154687500  721477730
Context: ON-DT-LOADBAL
  bandwidth                 26233    1211055    3093750  139218750          0
Context: ON-DV-LOADBAL
  bandwidth                 28805    2817966    3093750  139218750          0
Context: ON-IP-LOADBAL
  bandwidth                  8554    8260605    6187500  142312500          0
Context: ON-IT-LOADBAL
  bandwidth                 19460   15493586    3093750  139218750      24624
Context: ON-IV-LOADBAL
  bandwidth                 14217    1903158    3093750  139218750          0
Context: application
  bandwidth               1639524   30963104   18562500  154687500      69357
Context: presentation
  bandwidth                     0    3509268   18562500  154687500          0
Context: proxyisa
  bandwidth               1413487   10366270   18562500  154687500          0

I think that the values in bold should be 125000000 corresponding to 1Gbps if I don't make mistake.

More, if you take the following stats into account for the ON-DP-LOADBAL context, there was denied although the Peak values is smaller than the maximum 

     Resource         Current       Peak        Min        Max       Denied
-------------------------------------------------------------------------------

Context: ON-DP-LOADBAL
  bandwidth                 25937   31015563   18562500  154687500  721477730
 

Could you please help us to understand it ?

Thanks in advance.

Regards

Frédéric

[Kanwaljeet Singh]

Hi Frederic,

The calculation around resource allocation is not always simple:)

You have many classes and varying minimum allocations which makes it more difficult to calculate but i will give you an example which hopefully explains things clearly.

First of the values that you see above are in bytes and you need to multiply the values by 8 to get bps value.

So if you will multiply 1546875007x 8=1237500000 which is 1gbps.

Now, if you see you have allocated 15% min in 5 contexts and  2.50% in 4 and 5% in one.

So 15% of 1gbps would be 0.15gps and that is minimum reserved out of 1gbps for 5 contexts. Similarly 2.5% reserved for other 4 and 5% for 1. If you add these values 0.9gbps is reserved for all contexts which leaves 0.10gbps for use in global pool.

At the same time, you have "unlimited" for all contexts which means that for every context resource available from global pool would be shared. If you do "show resource usage all" and add peak values i am pretty sure the total would be more than the minimum allocated + available in global pool and that's why you see denies!

Regards,

Kanwal