VSC7440 datasheet(104/444 Pages) MICROSEMI

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Functional Descriptions

VMDS-10492 VSC7440 Datasheet Revision 4.2

3.15.6

VCAP CLM X16 Key Details

The X16 keys include an X16_TYPE field, which is used to tell 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 63 •

VCAP CLM X16 Key Details

Field Name

Description

Size

X16_TYPE

X16 type.

0: NORMAL_7TUPLE.

1: CUSTOM_1.

1x x

FIRST

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

lookup, cleared for second lookup.

1x x

G_IDX_IS_SERVICE

Set if the VCAP CLM action from the previous VCAP CLM lookup

specified ISDX to be used as G_IDX.

1x x

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. It can be zero,

logical port number, or masqueraded port number.

x x

IGR_PORT_MASK_SEL

Mode selector for IGR_PORT_MASK.

0: Default setting.

1: Set for frames received from a loopback device, for example,

LBK_DEV*.

2: Set for masqueraded frames if

ANA_CL::CLM_MISC_CTRL.MASQ_IGR_MASK_ENA == 1.

A masqueraded frame is identified by the following criteria:

(ifh.fwd.dst_mode == inject && ifh.src_port != physical_src_port)

(misc.pipeline_act == inj_masq)

3: Set for the following frame types:

3.a: CPU injected frames and

ANA_CL::CLM_MISC_CTRL.CPU_IGR_MASK_ENA == 1

3.b: Frames received from VD0 or VD1 and

ANA_CL::CLM_MISC_CTRL.VD_IGR_MASK_ENA == 1

3.c: Frame received on a loopback device and

ANA_CL::CLM_MISC_CTRL.LBK_IGR_MASK_SEL3_ENA == 1.

If a frame fulfills multiple of above criteria, then higher value of

IGR_PORT_MASK_SEL takes precedence.

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