VSC7440 datasheet(207/444 Pages) MICROSEMI

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Functional Descriptions

VMDS-10492 VSC7440 Datasheet Revision 4.2

190

Figure 43 •

Port Mask Operation

3.23.2

Policing

This section describes the functions of the policers. The following table lists the applicable registers.

Table 121 •

Policer Control Registers Overview

Target::Register.Field

Description

Replication

ANA_AC_POL::POL_ALL_CFG

Configures general control settings.

ANA_AC_POL::POL_ACL_CTRL

Configures VCAP policer’s mode of operation.

ANA_AC_POL::POL_ACL_RATE_CFG

Configures VCAP policer’s peak information rate

ANA_AC_POL::POL_ACL_THRES_CFG

Configures VCAP policer’s burst capacity.

true

# Forwarding controlled from CLM or VCAP_S2?

REQ.COMMON.MASK_MODE == REPLACE_ALL?

# Final destination port mask

dst_mask := REQ.COMMON.PORT_MASK

# Additional forwarding from CLM or VCAP_S2?

REQ.COMMON.MASK_MODE == OR_DST_MASK?

# Add to final destination port mask

dst_mask |= REQ.COMMON.PORT_MASK

true

# Overrule forwarding from CLM or VCAP_S2?

REQ.COMMON.MASK_MODE == REPLACE_PGID?

# Replace pgid destination port mask

pgid_mask := REQ.COMMON.PORT_MASK

false

true

# Add forwarding from CLM or VCAP_S2?

REQ.COMMON.MASK_MODE == OR_PGID_MASK?

# Add to pgid destination port mask

pgid_mask |= REQ.COMMON.PORT_MASK

false

# Normal PGID forwarding

pgid_mask := PgidLookupSel(REQ)

# Source filtering?

ANA_L2:ISDX:SERVICE_CTRL.SRC_MASK_DIS ||

REQ.L3_FWD?

false

true

Mask Operation

# Ignore source filtering

src_mask := ALL_ONES

# Prepare masks

src_mask := SrcTable(REQ.COMMON.PORTNUM)

aggr_mask := AggrTable(REQ.COMMON.AC)

true

# Ignore Aggregation mask

aggr_mask := ALL_ONES

true

false

# Aggreration selection?

ANA_L2:ISDX:SERVICE_CTRL.AGGR_REPLACE_EN

A==0 && ANA_L2:ISDX:SERVICE_CTRL.AGGR_VAL

!= 0?

dst_mask := pgid_mask &&

src_mask && aggr_mask && REQ.VLAN_PORT_MASK

false

Done selecting destination port mask

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