VSC7440 datasheet(92/444 Pages) MICROSEMI

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Functional Descriptions

VMDS-10492 VSC7440 Datasheet Revision 4.2

3.15.3

VCAP CLM X2 Key Details

The X2 keys include an X2_TYPE field, which is used to tell the difference between the keys. It takes a

unique value for each key. The following table lists details about the fields applicable to these keys.

Table 60 •

VCAP CLM X2 Key Details

Field Name

Description

Size

X2_TYPE

X2 type:

0: TRI_VID

1: DBL_MLBS

2: Reserved

3: TRI_VID_IDX

FIRST

Selects between entries relevant for first and second lookup. Set for first

lookup, cleared for second lookup.

IGR_PORT

Logical ingress port number retrieved from

ANA_CL::PORT_ID_CFG.LPORT_NUM.

G_IDX

Generic index used to bind together entries across VCAP CLM lookups.

G_IDX is calculated based on fields in VCAP CLM action from previous

VCAP CLM lookup:

NXT_IDX_CTRL.

NXT_IDX.

Default value is configurable in

ANA_CL::CLM_MISC_CTRL.CLM_GIDX_DEF_SEL. Can be zero, logical

port number, or masqueraded port number.

TPID0

Tag protocol identifier of the frame’s first tag (outer tag):

0: Untagged.

1: 0x8100.

4: 0x88A8.

5: Custom value 1.

6: Custom value 2.

7: Custom value 3.

PCP0

By default PCP from frame but it is selectable per lookup in VCAP CLM

whether to use the current classified PCP instead

(ANA_CL::ADV_CL_CFG.USE_CL_TCI0_ENA).

DEI0

By default DEI from frame but it is selectable per lookup in VCAP CLM

whether to use the current classified DEI instead

(ANA_CL::ADV_CL_CFG.USE_CL_TCI0_ENA).

VID0

By default VID from frame but it is selectable per lookup in VCAP CLM

whether to use the current classified VID instead

(ANA_CL::ADV_CL_CFG.USE_CL_TCI0_ENA).

For untagged frames, VID0 is set to 0.

TPID1

Tag protocol identifier of the frame’s second tag (tag after outer tag):

0: No second tag.

1: 0x8100.

4: 0x88A8.

5: Custom value 1.

6: Custom value 2.

7: Custom value 3.

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