VSC7440 datasheet(40/444 Pages) MICROSEMI

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Functional Descriptions

VMDS-10492 VSC7440 Datasheet Revision 4.2

VSTAX.DST when

VSTAX.FWD_MODE is

FWD_LLOOKUP or

FWD_GMIRROR

REW_CMD

42:32

11 bits

VCAP IS2 action REW_CMD.

VSTAX.DST when

VSTAX.FWD_MODE is

FWD_LOGICAL

DST_PORT_TYPE

1 bit

Destination port type. Encoding:

0: Front port

1: Internal port

DST_UPSID

41:37

5 bits

Destination unit port set ID.

DST_PN

36:32

5 bits

Logical destination port at unit identified by

dst_upsid.

VSTAX.DST when

VSTAX.FWD_MODE is

FWD_PHYSICAL

RSV

1 bit

Reserved field. Must be set to 0.

DST_UPSID

41:37

5 bits

Destination unit port set ID.

DST_PN

36:32

5 bits

Physical destination port at unit identified by

dst_upsid.

VSTAX.DST when

VSTAX.FWD_MODE is

FWD_MULTICAST

RSV

1 bit

Reserved field. Must be set to 0.

MC_IDX

41:32

10 bits

Forward to ports part of this multicast group index.

VSTAX.DST when

VSTAX.FWD_MODE is

FWD_GCPU_UPS

RSV

1 bit

Reserved field. Must be set to 0.

DST_UPSID

41:37

5 bits

Destination unit port set ID.

RSV

1 bit

Reserved field. Must be set to 0.

DST_PN

35:32

4 bits

CPU destination port at unit identified by

dst_upsid.

VSTAX.DST when

VSTAX.FWD_MODE is

FWD_GCPU_ALL

RSV

1 bit

Reserved field. Must be set to 0.

TTL_KEEP

1 bit

Special TTL handling used for neighbor discovery.

RSV

40:36

5 bits

Reserved field. Must be set to 0.

DST_PN

35:32

4 bits

CPU destination port at unit identified by

dst_upsid.

TAG

CL_PCP

31:29

3 bits

Classified priority code point value.

CL_DEI

1 bit

Classified drop eligible indicator value.

CL_VID

27:16

12 bits

Classified VID.

WAS_TAGGED

1 bit

If set, frame was VLAN-tagged at reception.

TAG_TYPE

1 bit

Tag type.

0: C-tag (EtherType 0x8100).

1: S-tag (EtherType 0x88A8).

INGR_PORT_TYPE 13:12

2 bits

Ingress ports type for private VLANs/Asymmetric

VLANs.

00: Promiscuous port.

01: Community port.

10: Isolated port.

Table 3 •

VStaX Header Fields (continued)

Field Category

Field Name

Bit

Width

Description

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