VSC7511 datasheet(104/324 Pages) MICROSEMI

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Functional Descriptions

VMDS-10488 VSC7511 Datasheet Revision 4.2

The two action vectors from the first and second lookups are combined into one action vector, which is

applied in the analyzer. For more information, see Forwarding Engine, page 109. The actions are

combined as follows:

•

HIT_ME_ONCE, CPU_COPY_ENA, CPU_QU_NUM:

If any of the two action vectors have HIT_ME_ONCE or CPU_COPY_ENA set, CPU_COPY_ENA is

POLICE_IDX

Selects VCAP policer used when policing frames

(POLICE_ENA).

POLICE_VCAP_ONLY

Disable policing from QoS, and port policers. Only the VCAP

policer selected by POLICE_IDX is active. Only applies to

the second lookup.

PORT_MASK

Port mask applied to the forwarding decision based on

MASK_MODE.

REW_OP

Rewriter operation command. The following functions are

supported:

No operation: REW_OP[3:0] = 0.

No operation.

Special Rewrite: REW_OP[3:0]= 8.

Swap the MAC addresses and clear bit 40 in the new SMAC

when transmitting the frame.

One-step PTP: REW_OP[2:0] = 2.

The frame's residence time is added to the correction field in

the PTP frame. The following sub-commands can be

encoded:

REW_OP[7]: Enables Add/subtract mode.

REW_OP[5]: Set if egress delay must be added to correction

field at egress.

REW_OP[4:3]: Configures if ingress delay must be

subtracted from the frame’s Rx time stamp. This is not

applicable for ingress ports in backplane mode.

Bits 4:3 = 0: No delay adjustments.

Bits 4:3 = 1: Subtract delay ANA:PORT:PTP_DLY1_CFG.

Bits 4:3 = 2: Subtract delay ANA:PORT:PTP_DLY2_CFG.

Two-step PTP: REW_OP[2:0] = 3.

The frame's departure time stamp is saved in the time stamp

FIFO queue at egress. REW_OP[8:3] holds the PTP time

stamp identifier used by the CPU.

Origin PTP: REW_OP[2:0] = 9.

The time of day at the frame's departure time is written into

the origin time stamp field in the PTP frame.

Unspecified bits must be set to 0.

SMAC_REPLACE_ENA 40

If set, frame’s source MAC address is replaced with MAC

address defined per egress port

(SYS::REW_MAC_LOW_CFG,

SYS::REW_MAC_HIGH_CFG)

RESERVED

Reserved. Must be set to 0.

ACL_ID

Logical ID for the entry. This ID is extracted together with the

frame in the CPU extraction header. Only applicable to

actions with CPU_COPY_ENA or HIT_ME_ONCE set.

HIT_CNT

A statistics counter that is incremented by one each time the

given action is hit.

Table 59 •

IS2 Action Fields (continued)

Action Field

Bit

Width

Description

VSC7511 Datasheet(PDF) 104 Page - Microsemi Corporation

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