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royceking_18057's avatar
royceking_18057
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Dec 19, 2014

Bandwidth Utilization warning

I am running a virtual edition BigIP system with a licensing limit of 24mbps. I get these messages in my syslog all the time. 

<133>Dec 19 16:28:09 testf51 notice tmm2[14781]: 01010045:5: Bandwidth utilization is 20 Mbps, exceeded 75% of Licensed 24 Mbps
<133>Dec 19 16:28:09 testf51 notice tmm[14781]: 01010045:5: Bandwidth utilization is 28 Mbps, exceeded 75% of Licensed 24 Mbps
<133>Dec 19 16:28:10 testf51 notice tmm2[14781]: 01010045:5: Bandwidth utilization is 20 Mbps, exceeded 75% of Licensed 24 Mbps
<133>Dec 19 16:28:11 testf51 notice tmm2[14781]: 01010045:5: Bandwidth utilization is 20 Mbps, exceeded 75% of Licensed 24 Mbps

My question is, does the VE throttle the traffic if it reaches 24mbps? If so, why do I see 28mbps and some times 30mbps in the log message? How is it exceeding the license and how high can it go?

Thanks

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  • royceking_18057's avatar
    royceking_18057
    Icon for Cirrus rankCirrus
    Dec 23, 2014

    nitass thanks for the response. Those articles were very informative. But still why is 28mbps getting through on my 24mbps license?

     

    Also, I have 4 TMM's, giving each one 6mbps. Should I lower my TMM's to 2 so they can each have 12? Would that help?

     

  • nitass's avatar
    nitass
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    Dec 24, 2014

    But still why is 28mbps getting through on my 24mbps license?

     

    i understand bandwidth utilization of one tmm reaches 7mbps which exceeds 75% of 6mbps (24mbps / 4). since each tmm has no idea about bandwidth utilization of others, bigip logs message by assuming total bandwidth utilization is 28mbps (4 x 7mbps). if i am not wrong, you could see drop counter in tmctl output.

     

    Also, I have 4 TMM's, giving each one 6mbps. Should I lower my TMM's to 2 so they can each have 12? Would that help?

     

    i think it depends on nature of traffic. if each connection utilizes more bandwidth, reducing number of tmm instances may be good. anyway, if there are number of connections which each utilizes small bandwidth utilization, more number of tmm instances may be better.

     

    just my 2 cents.

     

  • royceking_18057's avatar
    royceking_18057
    Icon for Cirrus rankCirrus
    Dec 29, 2014

    nitass I appreciate your help and answers. I think I will drop it down to 2 tmm for now to see if that helps.