VSC7440 datasheet(270/444 Pages) MICROSEMI

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Functional Descriptions

VMDS-10492 VSC7440 Datasheet Revision 4.2

253

POP_CNT

If POP_CNT > 0, then ifh.dst.encap.w16_pop_cnt is overruled with POP_CNT

when popping MPLS labels. The encoding is:

0: Use ifh.dst.encap.w16_pop_cnt as word16 (2 bytes) pop count

1: Do not pop any bytes.

2: Pop 2 × 2 = 4 bytes.

…

21: Pop 2 × 21 = 42 bytes.

22-31: Reserved.

If the number of bytes popped by POP_CNT is larger than the value given by

ifh.dst.encap.w16_pop_cnt, the IFH value is always used.

ESDX_BASE

Egress service index. Used to index egress service counter set

(REW::CNT_CTRL.STAT_MODE).

ESDX_BASE _P

Egress service index to use when enabled by PROTECTION_SEL.

ESDX_COSID_

OFFSET

Egress counter set, offset per COSID.

Stat index = ESDX_BASE + ESDX_COSID_OFFSET[(3 x COSID + 2) : 3 x COSID]

MAP_0_IDX

Index 0 into mapping resource A.

Index bits 10:3. Index bits 2:0 are controlled by MAP_0_KEY.

MAP_1_IDX

Index 1 into mapping resource A.

Index bits 10:3. Index bits 2:0 are controlled by MAP_1_KEY.

MAP_2_IDX

Index 0 into mapping resource B.

Index bits 10:3. Index bits 2:0 are controlled by MAP_2_KEY.

MAP_3_IDX

Index 1 into mapping resource B.

Index bits 10:3. Index bits 2:0 are controlled by MAP_2_KEY.

MAP_0_KEY

Key used when looking up mapping table 0.

QoS mappings:

0: QoS (8 entries): IDX = IDX_A + QOS.

1: DP, QoS (32 entries): IDX = IDX_A + IFH..DP × 8 + QOS.

DSCP mappings:

2: DSCP (64 entries): IDX = IDX_A + IFH..DSCP.

3: DP, DSCP (256 entries): IDX = IDX_A + 64 × IFH..DP + IFH..DSCP.

4: DP, TOS_PRE (32 entries): IDX = IDX_A + IFH..DP × 8 + TOS_PRE.

PCP mappings:

5: PCP (8 entries): IDX = IDX_A + IFH..PCP.

6: DP, PCP (32 entries): IDX = IDX_A + IFH..DP × 8 + IFH..PCP.

7: DEI, PCP (16 entries): IDX = IDX_A + IFH..DEI × 8 + IFH..PCP.

TC mappings:

8: TC: IDX = IDX_A + IFH..TC.

9: DP, TC: IDX = IDX_A + IFH..DP × 8 + IFH..TC.

Popped customer tag mappings:

10: Popped PCP (8 entries): IDX = MAP_0_IDX + pop.PCP

11: DP, popped PCP (32 entries): IDX = MAP_0_IDX + IFH..DP × 8 + pop.PCP.

12: Popped DEI, popped PCP (16 entries): IDX = MAP_0_IDX + pop.DEI × 8 +

pop.PCP.

COSID mappings:

13: COSID (8 entries): IDX = IDX_A + IFH.VSTAX.MISC.COSID.

14: DP, COSID (32 entries): IDX = IDX_A + IFH..DP × 8 +

IFH.VSTAX.MISC.COSID.

MAP_1_KEY

See MAP_0_KEY.

MAP_2_KEY

See MAP_0_KEY.

MAP_3_KEY

See MAP_0_KEY.

Table 172 •

VCAP_ES0 Actions (continued)

Field Name

Description

Width

VSC7440 Datasheet(PDF) 270 Page - Microsemi Corporation

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