FBFM2112F897CSLJLS View Datasheet(PDF) - Intel

Part Name

Description

Manufacturer

FBFM2112F897CSLJLS

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

Intel 

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

Note:

3.2.3.2

—The VLAN ID and VLAN priority defined in the packet are used as is

—The VLAN ID and VLAN priority defined in the packet are overwritten with the

default VLAN ID and default priority of the port on which the packet is received

—The VLAN ID and VLAN priority is ignored and the packet is considered

untagged. The method 3 is useful for support of Q-in-Q (or double tagging).

• Per port VLAN ingress policy, which can be set to any of the following:

— Discard all untagged packets

— Discard all tagged packets

— Discard ingress boundary violation - if the ingress port was not part of the

member list of that VLAN ID

— Discard egress boundary violation - if the egress port was not part of the

member list of that VLAN ID for a statically configured address. (boundary

violations are counted when none of the egress ports that survive the flood

mask are members of the VLAN).

— The FM2112 supports all 4096 VLANs in a central table that includes the

following fields:

VLANs are numbered 0-4095, and VLAN# 4095 is reserved.

• Membership list: If the destination is not part of the VLAN it will not be forwarded

to that port.

• Egress tag/untagged: If this bit is set, the frame will always leave with the VLAN

tag of the associated VLAN.

• Spanning tree state

— Per VLAN per port spanning tree state enables independent VLAN learning (IVL

Bridge).

— VLAN counters

— Up to 32 VLANs may be configured for statistics.

• Parity

Port-based VLAN

Port-based VLANs are an ad-hoc pre-standard implementation of VLANs

which can be used instead of or in addition to the IEEE 802.1Q-2004

VLAN tagging. In particular, port-based VLANs provided Mesh

architecture support.

In Port-based VLANs, the ports of the switch are separated into groups.

Each group is a Virtual LAN.

The following properties apply:

• A port may be a member of any and all other member lists

— The port configuration must be symmetric. If port A is configured to talk to port

B, port B should be configured to talk to A

— A port has only one VLAN and all frames that ingress that port are associated

with it. This VLAN association is implicit; there is no tagging, and the VLAN

does not survive outside the switch.

• Frames in one group are not forwarded to the ports that are not also in the group

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