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Functional Descriptions

VMDS-10492 VSC7440 Datasheet Revision 4.2

255

The following table lists the pipeline points available in the rewriter.

Each point in the flow assigns one of the possible pipeline actions listed in the following table.

Frames looped by the analyzer (PIPELINE_ACT = LBK_QS) have their ANA pipeline point changed to a

REW pipeline point, which indicates the point in the rewriter flow in REW where they appear again after

being looped. The following pipeline point translations are handled.

•

PIPELINE_PT = ANA_PORT_VOE is changed to REW_PORT_VOE

•

PIPELINE_PT = ANA_OU_VOE is changed to REW_OU_VOE

•

PIPELINE_PT = ANA_IN_VOE is changed to REW_IN_VOE

Frame forward and counter updates are done based on the assigned pipeline points and actions. In the

rewriter, pipeline points and actions can be assigned by ES0, the MIP, and the VOP.

Frames injected by a CPU can also have pipeline point and actions set in the injection IFH.

The rules listed in the following table apply when pipeline points are updated.

Table 173 •

Rewriter Pipeline Point Definitions

Pipeline Point

What can set it?

Position in Flow

NONE

Default

REW_IN_MIP

Inner MIP configured in rewriter

REW_IN_SW

Inner software MEP controlled by VCAP_ES0

REW_IN_VOE

Service VOE in VOP

REW_OU_VOE

Service VOE in VOP

REW_OU_SW

Outer software MEP controlled by VCAP_ES0

REW_OU_MIP

Outer software MIP configured in rewriter

REW_SAT

SAT software MEP controlled by VCAP_ES0

REW_PORT_VOE

Port VOE in VOP

REW_VRAP

Set in VRAP reply frame

Table 174 •

Pipeline Actions

Action Type

Name

Comment

Inject

INJ

INJ_MASQ

INJ_CENTRAL

Injection actions set by ANA are cleared when the frame enters the

rewriter by setting the pipeline point and action to NONE.

Extract

XTR

XTR_UPMEP

XTR_REW_LATE

XTR is set by ES0 and MIP.

XTR_UPMEP is also set by the VOP.

XTR_REW_LATE can only be set in ANA.

Loopback

LBK_ASM

LBK_QS

LBK_QS is set in ANA. This action is treated as an injection action

in the rewriter. LBK_ASM can be set by ES0 when looping frames

back to ANA. This action is treated as an extraction in the rewriter.

None

NONE

Default. No pipeline point and action is assigned to frame.

Table 175 •

Pipeline Point Updating Rules

Pipeline Action

Rule

None

The pipeline point and actions can be updated.

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