Re: [PATCH net-next v3] bonding: add a vlan+srcmac tx hashing option

From: David Ahern
Date: Mon Jan 18 2021 - 18:11:28 EST


On 1/15/21 12:21 PM, Jarod Wilson wrote:
> diff --git a/Documentation/networking/bonding.rst b/Documentation/networking/bonding.rst
> index adc314639085..36562dcd3e1e 100644
> --- a/Documentation/networking/bonding.rst
> +++ b/Documentation/networking/bonding.rst
> @@ -951,6 +951,19 @@ xmit_hash_policy
> packets will be distributed according to the encapsulated
> flows.
>
> + vlan+srcmac
> +
> + This policy uses a very rudimentary vland ID and source mac

s/vland/vlan/

> + ID hash to load-balance traffic per-vlan, with failover

drop ID on this line; just 'source mac'.


> + should one leg fail. The intended use case is for a bond
> + shared by multiple virtual machines, all configured to
> + use their own vlan, to give lacp-like functionality
> + without requiring lacp-capable switching hardware.
> +
> + The formula for the hash is simply
> +
> + hash = (vlan ID) XOR (source MAC vendor) XOR (source MAC dev)
> +
> The default value is layer2. This option was added in bonding
> version 2.6.3. In earlier versions of bonding, this parameter
> does not exist, and the layer2 policy is the only policy. The