VSC7511 datasheet(103/324 Pages) MICROSEMI

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Functional Descriptions

VMDS-10488 VSC7511 Datasheet Revision 4.2

3.8.3.1.1

IS2 Action Encoding

The VCAP generates an action vector from each of the two IS2 lookups for each frame.

The first IS2 lookup returns a default action vector per ingress port when no entries are matched, and the

second IS2 lookup returns a common default action vector when no entries are matched. There are no

difference between an actionvector from a match and a default action vector.

The following table lists the available fields for the action vector.

CUSTOM_TYPE

0: CUSTOM_IP - Custom data extracted from byte 34

(corresponds to the first byte after the IPv4 header if the

frame is IPv4).

1: CUSTOM_SMAC - Custom data extracted from byte

12 (first byte after SMAC).

Note that up to two VLAN tags are removed before

extracting the data.

CUSTOM

320

Custom extracted data.

Table 59 •

IS2 Action Fields

Action Field

Bit

Width

Description

HIT_ME_ONCE

Setting this bit to 1 causes the first frame that hits this action

where the HIT_CNT counter is zero to be copied to the CPU

extraction queue specified in CPU_QU_NUM. The HIT_CNT

counter is then incremented and any frames that hit this

action later are not copied to the CPU. To re-enable the

HIT_ME_ONCE functionality, the HIT_CNT counter must be

cleared.

CPU_COPY_ENA

Setting this bit to 1 causes all frames that hit this action to be

copied to the CPU extraction queue specified in

CPU_QU_NUM.

CPU_QU_NUM

Determines the CPU extraction queue that is used when a

frame is copied to the CPU due to a HIT_ME_ONCE or

CPU_COPY_ENA action.

MASK_MODE

Controls how PORT_MASK is applied.

0: No action from PORT_MASK.

1: Permit/deny (PORT_MASK AND’ed with destination set).

2: Policy forwarding (DMAC lookup replaced with

PORT_MASK).

3: Redirect (Previous forwarding decisions (classifier, IS1,

SRC, AGGR, VLAN, and DMAC lookup) are replaced with

PORT_MASK).

The CPU port is not touched by MASK_MODE.

MIRROR_ENA

Setting this bit to 1 causes frames to be mirrored to the mirror

target port (ANA::MIRRPORPORTS).

LRN_DIS

Setting this bit to 1 disables learning of frames hitting this

action.

POLICE_ENA

Setting this bit to 1 causes frames that hit this action to be

policed by the ACL policer specified in POLICE_IDX. Only

applies to the first lookup.

Table 58 •

IS2 CUSTOM Key (continued)

Field Name

Bit

Width

Description

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