L2 Bridge Configuration: HIF-EMAC Only (No EMAC-to-EMAC Forwarding)

minJ — Thu, 19 Mar 2026 09:58:33 GMT

Hello.

I am configuring an L2 bridge on the S32G3.

In a master-slave setup, I am using the L2 bridge so that the slave can also receive packets.

In my L2 bridge configuration, hif0, hif1, hif2, hif3, and emac0, emac1, emac2 are all connected to the bridge.

To prevent broadcast storms between emac interfaces, I registered the broadcast MAC address as a static MAC.

However, when all ports are connected to LAN cables or a switch, IGMP messages are generated infinitely.

To prevent this, I set Multicast miss to DISCARD, but then all multicast packets are dropped.

To solve this, I want to configure an L2 bridge where only HIF and EMAC are connected, and there is no direct connection between EMACs.

Also, I do not want to register the PC's MAC address as a static MAC, and I do not want to use promiscuous mode or VLAN.

Below is my L2 bridge configuration.

libfci_cli bd-flush --static

ifconfig pfe0 192.168.0.20
ifconfig pfe1 192.168.1.20
ifconfig pfe2 192.168.2.20

libfci_cli bd-insif --vlan 1 --i hif0 --tag OFF
libfci_cli bd-insif --vlan 1 --i hif1 --tag OFF
libfci_cli bd-insif --vlan 1 --i hif2 --tag OFF
libfci_cli bd-insif --vlan 1 --i hif3 --tag OFF
libfci_cli bd-insif --vlan 1 --i emac0 --tag OFF
libfci_cli bd-insif --vlan 1 --i emac1 --tag OFF
libfci_cli bd-insif --vlan 1 --i emac2 --tag OFF

libfci_cli bd-update --vlan 1 --ucast-hit FORWARD --ucast-miss FLOOD --mcast-hit FORWARD --mcast-miss DISCARD

libfci_cli phyif-update --i hif0 -E --promisc OFF --mode VLAN_BRIDGE
libfci_cli phyif-update --i hif1 -E --promisc OFF --mode VLAN_BRIDGE
libfci_cli phyif-update --i hif2 -E --promisc OFF --mode VLAN_BRIDGE
libfci_cli phyif-update --i hif3 -E --promisc OFF --mode VLAN_BRIDGE
libfci_cli phyif-update --i emac0 -E --promisc OFF --mode VLAN_BRIDGE
libfci_cli phyif-update --i emac1 -E --promisc OFF --mode VLAN_BRIDGE
libfci_cli phyif-update --i emac2 -E --promisc OFF --mode VLAN_BRIDGE

libfci_cli bd-stent-add --vlan 1 --mac <Master Mac Address 1> --i hif0
libfci_cli bd-stent-add --vlan 1 --mac <Master Mac Address 2> --i hif1
libfci_cli bd-stent-add --vlan 1 --mac <Master Mac Address 3> --i hif2
libfci_cli bd-stent-add --vlan 1 --mac <Slave Mac Address 1> --i hif3
libfci_cli bd-stent-add --vlan 1 --mac <Slave Mac Address 2> --i hif3
libfci_cli bd-stent-add --vlan 1 --mac <Slave Mac Address 3>--i hif3

libfci_cli bd-stent-add --vlan 1 --mac ff:ff:ff:ff:ff:ff --i hif0
libfci_cli bd-stent-add --vlan 1 --mac ff:ff:ff:ff:ff:ff --i hif1
libfci_cli bd-stent-add --vlan 1 --mac ff:ff:ff:ff:ff:ff --i hif2
libfci_cli bd-stent-add --vlan 1 --mac ff:ff:ff:ff:ff:ff --i hif3
libfci_cli bd-stent-update --vlan 1 --mac ff:ff:ff:ff:ff:ff --egress=hif0,hif1,hif2,hif3

libfci_cli bd-stent-update --vlan 1 --mac <Master Mac Address 1> --egress hif0
libfci_cli bd-stent-update --vlan 1 --mac <Master Mac Address 2> --egress hif1
libfci_cli bd-stent-update --vlan 1 --mac <Master Mac Address 3> --egress hif2

libfci_cli bd-stent-update --vlan 1 --mac <Slave Mac Address 1>--egress hif3
libfci_cli bd-stent-update --vlan 1 --mac <Slave Mac Address 2> --egress hif3
libfci_cli bd-stent-update --vlan 1 --mac <Slave Mac Address 3> --egress hif3

Re: L2 Bridge Configuration: HIF-EMAC Only (No EMAC-to-EMAC Forwarding)

Joey_z — Thu, 19 Mar 2026 13:52:15 GMT

Hi,minJ

I have received your question and will help you to check it.

Joey

Re: L2 Bridge Configuration: HIF-EMAC Only (No EMAC-to-EMAC Forwarding)

Joey_z — Mon, 23 Mar 2026 07:07:16 GMT

Hi,minJ

I see you put forward two same cases; I will support to you on the other case.

Joey

S32GのトピックRe: L2 Bridge Configuration: HIF-EMAC Only (No EMAC-to-EMAC Forwarding)

L2 Bridge Configuration: HIF-EMAC Only (No EMAC-to-EMAC Forwarding)

Re: L2 Bridge Configuration: HIF-EMAC Only (No EMAC-to-EMAC Forwarding)

Re: L2 Bridge Configuration: HIF-EMAC Only (No EMAC-to-EMAC Forwarding)