FBFM2112F897CSLJLS View Datasheet(PDF) - Intel

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FBFM2112F897CSLJLS

Intel® FM2112 24-Port 10G/1G Ethernet Switch Chip

Intel 

Intel® FM2112 24-Port 10G/1G Ethernet Switch Chip Data Sheet

3.2.5

3.2.5.1

To support proprietary BPDU addresses, it is possible to use a non-

reserved multicast address. The address can be configured in the MAC

address table, and VLAN multicast tunnel may be used to prevent this

configuration from taking multiple table entries.

The Intel®Ethernet Switch Family supports two learning modes:

• SVL Bridge: Shared VLAN Learning bridge. All of the VLANs are mapped to the

same Forwarding information database (FID).

• IVL Bridge: Independent VLAN Learning bridge. Each VLAN is mapped to its own

FID. In this case, the VLAN is an extension of the MAC address, and the table is

searched with a 60 bit key instead of a 48 bit key. Furthermore independent port

state is stored in the VLAN ID table for disabled, listening, learning, and

forwarding.

To enable the spanning tree algorithm, the Intel®Ethernet Switch

Family supports the following port states

• Disabled: The port drops all packets on Ingress and Egress.

• Listening: The port drops all packets except BPDUs

• Learning: The port drops all packets exept BPDUs and on Ingress, the port learns

addresses

• Forwarding: The port forwards all packets normally.

The Intel®Ethernet Switch Family stores this state in the VLAN table.

There are 4094 vectors of per-port spanning tree state. In independent

learning mode, all port state is independent. In shared learning mode,

the port state with VLAN ID 0 is used for all VLANs on all ports.

Multicast and Protocol Traps

{Described in registers Table 64, Table 66, Table 67, and Table 68}

MAC Address Traps

The reserved group addresses supported by the Intel®Ethernet Switch

Family are:

0xFFFFFFFFFFFF

0x0180C2000000

0x0180C2000001

0x0180C2000002

0x0180C2000003

0x0180C2000020

0x0180C2000021

0x01005E000001

=> Broadcast

=> Spanning tree

=> Pause

=> Link aggregation

=> Port authentication (802.1X)

=> GMRP

=> GVRP

=> IGMP v3 query

The switch has the ability to trap frames of some special multicast

addresses. Each trap is separately enabled. The traps are:

• BDPU - Spanning Tree : 0x0180C2000000

• LACP - Link Aggregation Control Protocol: 0x0180C2000002

• Port Authentication: 0x0180C2000003

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