Allied Telesis management software layer 2+ fast ethernet switches Set switch multicastmode=a

Chapter 25: STP Commands

There are four possible states: A, B, C, and D. The states are described here:

A - Discards all ingress spanning tree BPDU and 802.1x EAPOL packets on all ports. The switch behaves as follows:

❑If STP, RSTP, and MSTP are disabled, all ingress BPDUs are discarded.

❑If 802.1x port-based access control is disabled, all ingress EAPOL packets are discarded.

B - Forwards ingress spanning tree BPDU and 802.1x EAPOL packets across all VLANs and ports. This is the default setting. The switch behaves as follows:

❑If STP, RSTP, and MSTP are disabled, ingress BPDUs are flooded on all ports.

❑If STP, RSTP, MSTP, and 802.1x are disabled on the switch, BPDUs and EAPOL packets are flooded on all ports.

❑If the switch is running STP or RSTP and 802.1x is disabled, EAPOL packets are flooded on all ports, except ports in the blocking state.

❑If the switch is running MSTP and 802.1x is disabled, EAPOL packets are flooded on all ports, including ports in the blocking state.

C - Forwards ingress BPDU and EAPOL packets only on untagged ports of the VLAN where the ingress port is a member. Packets are not forwarded from tagged ports. The VLAN is identified by the PVID assigned to the ingress port.

D - Forwards ingress BPDU and EAP packets from both tagged and untagged ports of the VLAN where the ingress port is a member. The VLAN is identified by the PVID assigned to the ingress port.

Example

The following command setting the switch’s mode to A to discard all ingress BPDUs and 802.1 EAPOL packets:

set switch multicastmode=a

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