Forum Discussion

cyber_18706's avatar
cyber_18706
Icon for Nimbostratus rankNimbostratus
Feb 24, 2009

FastL4 Buffer reassemble size

Hi,

 

 

I would like to know the size of buffer reassemble of FastL4 VIP with the option reassemble fragments set to enable ?

4 Replies

  • Hey cyber123, reassembly actually occurs at the IP layer, so fastL4 doesn't have anything to do with that, just allows the reassembly to occur if necessary.
  • Hello,

     

     

     

     

    I want to use a fastL4 custom profile and enable the parameter “Reassemble IP Fragments”. But I need to know:

     

     

    - What is the maximum number of fragment / amount of data that the system buffers for one IP packet?

     

     

    - What is the maximum amount of data that the system buffers for all IP packets?

     

     

     

     

    Customer context:

     

     

    - My customer established one UDP session: Source IP, Destination IP, Source port, Destination port are identical, the difference can be made only by an applicative Layer (SIP). So I have only one Virtual session on my Load-Balancer.

     

     

    - The UDP payload can reach 5 KBytes.

     

     

    - The MTU is dynamical (PMTU_discovery enable on F5).

     

     

    - The customer traffic is around 30 Mbits/s

     

     

     

     

    Thank you for your help

     

     

  • Courtesy of the development team, there can be no more than 4096 fragments in the system at any one time.