VSC7440 datasheet(91/444 Pages) MICROSEMI

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Functional Descriptions

VMDS-10492 VSC7440 Datasheet Revision 4.2

3.15.2

VCAP CLM X1 Key Details

The SGL_MLBS key is the only X1 key, so it does not have a type field.

The following table lists details about the fields applicable to the SGL_MLBS key.

L4_RNG

Range checker mask

x x

IP_PAYLOAD_5TUPLE

Payload bytes after IP header

OAM_Y1731

Set if frame's EtherType = 0x8902

OAM_MEL_FLAGS

Encoding of MD level/MEG level

(MEL)

CUSTOM1

64 bytes payload

512

CUSTOM2

32 bytes payload

256

CUSTOM4

15 bytes payload

120

Table 59 •

VCAP CLM X1 Key Details

Field Name

Description

Size

FIRST

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

cleared for second lookup.

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.

LBL0

MPLS Label Stack entry 0 - Label (Top Label)

SBIT0

MPLS Label Stack entry 0 - S-bit (Top Label)

TTL0_EXPIRY

Set if TTL<=1 for MPLS Label Stack entry 0

Table 58 •

VCAP CLM Key Overview (continued)

Field Name

Short Description

Size

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