VSC7440 datasheet(268/444 Pages) MICROSEMI

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Functional Descriptions

VMDS-10492 VSC7440 Datasheet Revision 4.2

251

TAG_C_DEI_SEL

Selects DEI source for ES0 tag C.

0: Classified DEI.

1: DEI_C_VAL.

2: REW::DP_MAP.DP [IFH.VSTAX.QOS.DP].

3: DEI of popped VLAN tag if available (IFH.VSTAX.TAG.WAS_TAGGED = 1 and

num_popped_tags>0) else DEI_C_VAL.

4: Mapped using mapping table 0, otherwise use DEI_C_VAL.

5: Mapped using mapping table 1, otherwise use mapping table 0.

6: Mapped using mapping table 2, otherwise use DEI_C_VAL.

7: Mapped using mapping table 3, otherwise use mapping table 2.

VID_A_VAL

VID used in ES0 tag A. See TAG_A_VID_SEL.

PCP_A_VAL

PCP used in ES0 tag A. See TAG_A_PCP_SEL.

DEI_A_VAL

DEI used in ES0 tag A. See TAG_A_DEI_SEL.

VID_B_VAL

VID used in ES0 tag B. See TAG_B_VID_SEL.

PCP_B_VAL

PCP used in ES0 tag B. See TAG_B_PCP_SEL.

DEI_B_VAL

DEI used in ES0 tag B. See TAG_B_DEI_SEL.

VID_C_VAL

VID used in ES0 tag C. See TAG_C_VID_SEL.

PCP_C_VAL

PCP used in ES0 tag C. See TAG_C_PCP_SEL.

DEI_C_VAL

DEI used in ES0 tag C. See TAG_C_DEI_SEL.

POP_VAL

Pops one additional Q-tag.

num_popped_tags = IFH.tagging.pop_cnt + POP_VAL.

The rewriter counts the number of Q-tags in the frame and only pops tags that are

present in the frame. NUM_POPPED_TAGS is equal to the last available tag.

UNTAG_VID_ENA

Controls insertion of tag C. Un-tag or insert mode can be selected. See

PUSH_CUSTOMER_TAG.

PUSH_CUSTOMER

_TAG

Selects tag C mode:

0: Do not push tag C.

1: Push tag C if IFH.VSTAX.TAG.WAS_TAGGED = 1.

2: Push tag C if IFH.VSTAX.TAG.WAS_TAGGED = 0.

3: Push tag C if UNTAG_VID_ENA = 0 or (C-TAG.VID ! = VID_C_VAL).

TAG_C_VID_SEL

Selects VID for ES0 tag C. The resulting VID is termed C-TAG.VID.

0: Classified VID.

1: VID_C_VAL.

DSCP_SEL

Selects source for DSCP.

0: Controlled by port configuration and IFH.

1: Classified DSCP via IFH.

2: DSCP_VAL.

3: Reserved.

4: Mapped using mapping table 0, otherwise use DSCP_VAL.

5: Mapped using mapping table 1, otherwise use mapping table 0.

6: Mapped using mapping table 2, otherwise use DSCP_VAL.

7: Mapped using mapping table 3, otherwise use mapping table 2.

DSCP_VAL

DSCP value.

Table 172 •

VCAP_ES0 Actions (continued)

Field Name

Description

Width

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