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danieloliveira's avatar
danieloliveira
Icon for Altostratus rankAltostratus
Jan 30, 2023

vCMP logical interfaces throughput

Hello, we currently have 2 BIG-IP 15800 each one connected with 2 100Gb interfaces. 

So i have  a guest vcmp with 8vCPU and 8 logical interfaces 0.1, 0.2, 0.3 and so on to 0.8. In the cli-console or at my zabbix those interfaces are detected as 10Gb each, and i can see traffic in all of them...

My question is, are those virtual interfaces capped at 10Gb ? Or in another words, how much bandwidth do i have on this vCMP?

 

 

application delivery
interface
network
  • Brian_Van_Lieu's avatar
    Brian_Van_Lieu
    Feb 10, 2023

    The hypervisor is virtualizing networking so you will see an 'interface' for each vCPU.

    For standard VS's , typically a TMM can't process more then 10G of traffic, for fastl4 use cases the FPGA offload occurs before TMM.  

    Said another way, there isn't a hard cap on bandwidth to the guest but there are practical limits in place for most traffic use cases. 

    https://support.f5.com/csp/article/K03740927

     

     

  • Brian_Van_Lieu's avatar
    Brian_Van_Lieu
    Icon for Employee rankEmployee
    Feb 10, 2023

    The hypervisor is virtualizing networking so you will see an 'interface' for each vCPU.

    For standard VS's , typically a TMM can't process more then 10G of traffic, for fastl4 use cases the FPGA offload occurs before TMM.  

    Said another way, there isn't a hard cap on bandwidth to the guest but there are practical limits in place for most traffic use cases. 

    https://support.f5.com/csp/article/K03740927

     

     

    • danieloliveira's avatar
      danieloliveira
      Icon for Altostratus rankAltostratus
      Feb 15, 2023

      Thak you Brian_Van_Lieu for the answer and article suggestion.

      "Said another way, there isn't a hard cap on bandwidth to the guest but there are practical limits in place for most traffic use cases. " In essence are the limits of processing per vcmp and the type of traffic/layer going trough rigth ?

      "typically a TMM can't process more then 10G of traffic"  Can i undertand that a single vcmp even with 8vCPUs cant process more that 10G of traffic?

      • Brian_Van_Lieu's avatar
        Brian_Van_Lieu
        Icon for Employee rankEmployee
        Feb 15, 2023

        TMM is threaded on the cores, so its really 10G/s (or more) per TMM. The 10G/s per TMM is a round-ish number for guidance, not an absolute. 

        If you have 4 TMMs, you can achieve 40Gb/s (or more). 

        This is very dependent of course on traffic, packet sizes, and what additional (if any) work BIG-IP is doing on the traffic as it passes through the data plane. 

         

         

         

  • Leslie_Hubertus's avatar
    Leslie_Hubertus
    Ret. Employee
    Feb 07, 2023

    Hey danieloliveira  - I saw that nobody had answered your question yet, so I featured your post in this week's Highlights article, and will ask a colleague for some help.