VSC7440 datasheet(271/444 Pages) MICROSEMI

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Functional Descriptions

VMDS-10492 VSC7440 Datasheet Revision 4.2

254

3.26.5.1 Rewriter Pipeline Handling

In order to achieve the correct statistics and processing of frames, it is important that frames can be

extracted, injected, discarded, and looped at specific positions in the processing flow. Based on the

position, processing—especially counters, are affected. For information about how pipeline points are

used in the processing flow, see Pipeline Points, page 67.

Note that a frame is always physically passed through the entire processing. Logically, certain elements

of the processing can be disabled or enabled.

OAM_MEP_IDX_VL

Setting this bit to 1 causes the OAM_MEP_IDX to be used.

OAM_MEP_IDX

OAM MEP index.

OAM_MEP_IDX_P

OAM MEP index to use when enabled by PROTECTION_SEL.

OAM_LM_COSID_

COLOR_SEL

0: Mapped using mapping table 0 if valid, otherwise use value 0.

1: Mapped using mapping table 1 if valid, otherwise use mapping table 0.

2: Mapped using mapping table 2 if valid, otherwise use value 0.

3: Mapped using mapping table 3 if valid, otherwise use mapping table 2.

INDEPENDENT_

MEL_ENA

OAM MEL mode.

MIP_IDX

Ethernet MIP index.

0: Disable.

Other: MIP index value.

FWD_SEL

ES0 Forward selector.

0: No action.

1: Copy to loopback interface.

2: Redirect to loopback interface.

3: Discard.

CPU_QU

CPU extraction queue. Used when FWD_SEL >0 and PIPELINE_ACT = XTR.

PIPELINE_PT

ES0 pipeline point.

0: REW_IN_SW.

1: REW_OU_SW.

2: REW_SAT.

3: Reserved.

PIPELINE_ACT

Pipeline action when FWD_SEL >0.

0: XTR. CPU_QU selects CPU extraction queue

1: LBK_ASM.

SWAP_MAC_ENA

This setting is only active when FWD_SEL = 1 or FWD_SEL = 2 and

PIPELINE_ACT = LBK_ASM.

0: No action.

1: Swap MACs and clear bit 40 in new SMAC.

LOOP_ENA

Setting LOOP_ENA overrides the other pipeline control settings.

0: Forward based on PIPELINE_PT and FWD_SEL

1: Force FWD_SEL=REDIR, PIPELINE_ACT = LBK_ASM,

PIPELINE_PT = REW_SAT, swap MACs and clear bit 40 in new SMAC. Do not

apply CPU_QU.

Table 172 •

VCAP_ES0 Actions (continued)

Field Name

Description

Width

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