lkml.org 
[lkml]   [2022]   [Aug]   [1]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
    /
    Date
    From
    SubjectRe: [PATCH v4 net-next 3/6] drivers: net: dsa: add locked fdb entry flag to drivers
    On 2022-07-13 14:39, Ido Schimmel wrote:

    >
    > What are "Storm Prevention" and "zero-DPV" FDB entries?
    >

    For the zero-DPV entries, I can summarize:

    Since a CPU can become saturated from constant SA Miss Violations from a
    denied source, source MAC address are masked by loading a zero-DPV
    (Destination Port Vector) entry in the ATU. As the address now appears
    in the database it will not cause more Miss Violations. ANY port trying
    to send a frame to this unauthorized address is discarded. Any locked
    port trying to use this unauthorized address has its frames discarded
    too (as the ports SA bit is not set in the ATU entry).

    \
     
     \ /
      Last update: 2022-08-01 17:34    [W:4.173 / U:0.032 seconds]
    ©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site