VSC7440 datasheet(111/444 Pages) MICROSEMI

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Functional Descriptions

VMDS-10492 VSC7440 Datasheet Revision 4.2

VID_ADD_REPLACE_SEL

Controls the classified VID.

0: New VID = old VID + VID_VAL.

1: New VID = VID_VAL.

2: New VID = VID from frame's second tag (middle tag) if

available, otherwise VID_VAL.

3: New VID = VID from frame's third tag (inner tag) if available,

otherwise VID_VAL.

x x

VID_VAL

By default, add this value to the current classified VID. Note this

is not the VID used as key into VCAP CLM. If the classified VID +

VID_ADD_VAL exceeds the range of 12 bit then a wrap around is

done.

x x

VLAN_POP_CNT_ENA

If set, VLAN_POP_CNT is used.

x x

VLAN_POP_CNT

VLAN pop count: 0, 1, 2, or 3 tags.

Post-processing of VLAN_POP_CNT: If VLAN_POP_CNT

exceeds the actual number of tags in the frame, it is reduced to

match the number of VLAN tags in the frame.

2x x

VLAN_WAS_TAGGED

Controls the WAS_TAGGED setting forwarded to the rewriter.

0: No changes to WAS_TAGGED.

1: Set WAS_TAGGED to 0.

2: Set WAS_TAGGED to 1.

3: Reserved.

2x x

ISDX_ADD_REPLACE_SEL

Controls the classified ISDX.

0: New ISDX = old ISDX + ISDX_VAL.

1: New ISDX = ISDX_VAL.

xxxx

ISDX_VAL

See ISDX_ADD_REPLACE_SEL.

xxxx

MASK_MODE

Controls how PORT_MASK is applied.

0: OR_DSTMASK: Or PORT_MASK with destination mask.

1: AND_VLANMASK: And PORT_MASK with VLAN mask. The

actual ANDing with the VLAN mask is performed after the

ANA_L3 block has determined the VLAN mask.

2: REPLACE_PGID: Replace PGID port mask from MAC table

lookup by PORT_MASK.

3: REPLACE_ALL: Use PORT_MASK as final destination set

replacing all other port masks.

4: REDIR_PGID: Redirect using PORT_MASK[7:0] as PGID

table index. See PORT_MASK for extra configuration options.

5: OR_PGID_MASK: Or PORT_MASK with PGID port mask from

MAC table lookup.

6: Reserved.

7: Not applicable.

Note that for REDIR_PGID, REPLACE_ALL, and VSTAX, the

port mask becomes “sticky” and cannot be modified by

subsequent processing steps.

The CPU port is untouched by MASK_MODE.

Table 65 •

VCAP CLM Actions (continued)

Field Name

Description and Encoding

Size

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