VSC7511 datasheet(107/324 Pages) MICROSEMI

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Functional Descriptions

VMDS-10488 VSC7511 Datasheet Revision 4.2

The HOST_MATCH flag is used as input into the IS2 keys. This enables further handling of frames either

matching or not matching a host pair in the SMAC_SIP table.

3.8.4

VCAP ES0

This section provides information about the ES0 key and associated actions.

3.8.4.1

ES0 Entry Key Encoding

All frames are subject to one ES0 lookup per destination port. The key in ES0 is generated based on the

frame’s VLAN classification.

VCAP ES0 can hold 256 ES0 entries.

The following table lists the ES0 key.

3.8.4.2

ES0 Action Encoding

The VCAP generates one action vector from the ES0 lookup. The lookup returns a default action vector

per egress port when no entries are matched. There are no difference between an action vector from a

match and a default action vector.

The following table lists the available action fields for ES0. For more information about how the actions

are applied to the VLAN manipulations, see VLAN Editing, page 133.

Table 64 •

ES0 Key

Field Name

Bit

Width

Description

Interface Information

EGR_PORT

The port number where the frame is transmitted (0-11).

IGR_PORT

The port number where the frame was received (0-11).

RESERVED

Reserved. Must be set to don’t care.

L2_MC

Set if frame’s destination MAC address is a multicast address

(bit 40 = 1).

L2_BC

Set if frame’s destination MAC address is the broadcast

address (FF-FF-FF-FF-FF-FF).

Tagging Information

VID

Classified VID that is the result of the VLAN classification in

basic classification and IS1.

Frame’s drop precedence (DP) level after policing.

PCP

Classified PCP that is the final result of the VLAN

classification in basic classification and IS1.

Table 65 •

ES0 Action Fields

Action Field

Bit

Width

Description

PUSH_OUTER_TAG 0

Controls outer tagging.

0: No ES0 tag A: Port tag is allowed if enabled on port.

1: ES0 tag A: Push ES0 tag A. No port tag.

2: Force port tag: Always push port tag. No ES0 tag A.

3: Force untag: Never push port tag or ES0 tag A.

PUSH_INNER_TAG

Controls inner tagging.

0: Do not push ES0 tag B as inner tag.

1: Push ES0 tag B as inner tag.

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