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charset=UTF-8; format=flowed Content-Transfer-Encoding: 8bit X-DetectorID-Processed: b00c1d49-9d2e-4205-b15f-d015386d3d5e On 8/11/26 01:06, Jonas Gorski wrote: > On Mon, Aug 10, 2026 at 2:04 PM Vladimir Oltean wrote: >> >> On Thu, Aug 06, 2026 at 01:09:03PM +0200, Jonas Gorski wrote: >>>> static int b53_arl_rw_op(struct b53_device *dev, unsigned int op) >>>> { >>>> u8 reg; >>>> >>>> if (op > ARLTBL_RW) >>>> return -EINVAL; >>>> >>>> b53_read8(dev, B53_ARLIO_PAGE, B53_ARLTBL_RW_CTRL, ®); >>>> reg |= ARLTBL_START_DONE; >>>> if (op) >>>> reg |= ARLTBL_RW; >>>> else >>>> reg &= ~ARLTBL_RW; >>>> if (dev->vlan_enabled) >>>> reg &= ~ARLTBL_IVL_SVL_SELECT; >>>> else >>>> reg |= ARLTBL_IVL_SVL_SELECT; >>> >>> This ARLTBL_IVL_SVL_SELECT bit is only implemented for a small subset >>> of switches (bcm5302x / bcm58* and bcm53134). Additionally, according >>> to the register description, this also requires enabling "per port >>> IVL/SVL" mode, which is not enable by b53. The description of that >>> also says that the VIDs used in SVL ports must not be used in IVL >>> ports. No idea what the consequences are if they do. >> >> What does enabling per port IVL/SVL mode do? > > I don't have access to a datasheet or a device to test, Florian will > need to answer that completely. Not a whole lot of details in the datasheet, but essentially what is being provided is: IVL: a given MAC address can only appear in one VLAN SVL: a given MAC address can appear on different ports as long as the ports are not in the same VLAN. > > I can only guess from the register descriptions, which imply that > enabling SVL for port makes any ARL lookups SVL based, i.e. VID is > ignored/forced to 0. Presumably this essentially only applies to for > frames received on that port for lookup / learning. > > There is a global option for configuring IVL or SVL, but this option > is only valid when VLAN-aware is enabled in the switch. Without it, > learning is always SVL. > > I do not know how the per port IVL/SVL actually register works, and > whether you can enable IVL in VLAN-unaware mode (I would guess not). IVL/SVL applies to 802.1Q (VLAN enabled) mode, double tagging mode and individual double tagging mode, so yes this depends on VLAN being enabled globally. > > Note that there is no differentiation in ARL entries themselves > whether they are IVL or SVL entries, only the table index calculation > changes. > > Best regards, > Jonas -- Florian