Re: [PATCH v2 net-next 1/4] net: bridge: add fdb flag to extent locked port feature

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On tor, mar 17, 2022 at 15:44, Ido Schimmel <idosch@xxxxxxxxxx> wrote:
> On Thu, Mar 17, 2022 at 10:38:59AM +0100, Hans Schultz wrote:
>> Add an intermediate state for clients behind a locked port to allow for
>> possible opening of the port for said clients. This feature corresponds
>> to the Mac-Auth and MAC Authentication Bypass (MAB) named features. The
>> latter defined by Cisco.
>> Only the kernel can set this FDB entry flag, while userspace can read
>> the flag and remove it by deleting the FDB entry.
>
> Can you explain where this flag is rejected by the kernel?
>
Is it an effort to set the flag from iproute2 on adding a fdb entry?

> Nik, it seems the bridge ignores 'NDA_FLAGS_EXT', but I think that for
> new flags we should do a better job and reject unsupported
> configurations. WDYT?
>
> The neighbour code will correctly reject the new flag due to
> 'NTF_EXT_MASK'.



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