ExtremeSwitching (EXOS)

  • 1.  How to MSS adjustment for TCP applications ?

    Posted 07-26-2017 07:12
    I want to adjust-mss of an interface to 1390. How can I do it in EXOS 16.2.1.6?


  • 2.  RE: How to MSS adjustment for TCP applications ?

    Posted 07-26-2017 11:12
    You can change the MTU on our switches (default is 1500). Which includes the MAC, IP, TCP, vlan headers.

    The below wiki page has a example calculation from MSS to MTU. Hope this helps

    https://en.wikipedia.org/wiki/Maximum_segment_size



  • 3.  RE: How to MSS adjustment for TCP applications ?

    Posted 07-26-2017 11:12
    I want to adjust mss to 1390 in order to have a symmetry with 2 WAN connections.
    but I can set MTU as 1500. Below that, it is not allowed.


  • 4.  RE: How to MSS adjustment for TCP applications ?

    Posted 07-26-2017 11:12
    I would think the mss value would be set on the application. Our switch doesn't look into the payload to check the MMS(maximum segment size). We look at the MTU.



  • 5.  RE: How to MSS adjustment for TCP applications ?

    Posted 07-26-2017 22:16
    Hello Weda,

    Here is the reference about how EXOS MTU works.

    Show size of MTU EXOS
    https://community.extremenetworks.com/extreme/topics/show-size-of-mtu-exos

    Hope it will help you.

    Best regards,
    Bin