netdev - bond_eth_hash only uses the fifth byte of MAC address

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Message-ID: <CALnKHDCKs-_XvW0jFAu1yv-Ex_OabqzuyBy=US_W-jzwy9N3Ug@mail.gmail.com>
Date: Tue, 10 Jun 2025 09:54:25 -0700
From: Haylin Moore <hmoore@...ulo.com>
To: netdev@...r.kernel.org
Subject: bond_eth_hash only uses the fifth byte of MAC address

Hello All,

I am currently digging into the source code powering layer2+3 bonding
and saw that for bond_eth_hash only the 5th byte of both the source
and destination MAC address is used in the XOR.

Is there a reason for this? I was not able to find anything searching
the mailing lists or the web. This functionality while documented just
feels weird to me.

Thank you,
Haylin Moore