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cd5b92eb56
add a new sysctl, net.link.bridge.member_ifaddrs, which defaults to 1. if it is set to 1, bridge behaviour is unchanged. if it is set to 0: - an interface which has AF_INET6 or AF_INET addresses assigned cannot be added to a bridge. - an interface in a bridge cannot have an AF_INET6 or AF_INET address assigned to it. - the bridge will no longer consider the lladdrs on bridge members to be local addresses, i.e. frames sent to member lladdrs will not be processed by the host. update bridge.4 to document this behaviour, as well as the existing recommendation that IP addresses should not be configured on bridge members anyway, even if it currently partially works. in testing, setting this to 0 on a bridge with 50 member interfaces improved throughput by 22% (4.61Gb/s -> 5.67Gb/s) across two member epairs due to eliding the bridge member list walk in GRAB_OUR_PACKETS. Reviewed by: kp, des Approved by: des (mentor) Differential Revision: https://reviews.freebsd.org/D49995 (cherry picked from commit 0a1294f6c610948d7447ae276df74a6d5269b62e) |
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