[PATCH] bonding: Update layer2 and layer2+3 hash formula documentation

From: Gal Pressman
Date: Wed Apr 06 2022 - 12:34:26 EST


When using layer2 or layer2+3 hash, only the 5th byte of the MAC
addresses is used.

Signed-off-by: Gal Pressman <gal@xxxxxxxxxx>
---
Documentation/networking/bonding.rst | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/Documentation/networking/bonding.rst b/Documentation/networking/bonding.rst
index 525e6842dd33..43be3782e5df 100644
--- a/Documentation/networking/bonding.rst
+++ b/Documentation/networking/bonding.rst
@@ -894,7 +894,7 @@ xmit_hash_policy
Uses XOR of hardware MAC addresses and packet type ID
field to generate the hash. The formula is

- hash = source MAC XOR destination MAC XOR packet type ID
+ hash = source MAC[5] XOR destination MAC[5] XOR packet type ID
slave number = hash modulo slave count

This algorithm will place all traffic to a particular
@@ -910,7 +910,7 @@ xmit_hash_policy
Uses XOR of hardware MAC addresses and IP addresses to
generate the hash. The formula is

- hash = source MAC XOR destination MAC XOR packet type ID
+ hash = source MAC[5] XOR destination MAC[5] XOR packet type ID
hash = hash XOR source IP XOR destination IP
hash = hash XOR (hash RSHIFT 16)
hash = hash XOR (hash RSHIFT 8)
--
2.25.1