VSC7440 datasheet(195/444 Pages) MICROSEMI

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Functional Descriptions

VMDS-10492 VSC7440 Datasheet Revision 4.2

178

The following SCAN status is available:

•

Match scan result for the last matching row is reported

(LRN::LATEST_POS_STATUS.SCAN_NEXT_STATUS).

•

Number of entries found during the scan found (LRN::SCAN_NEXT_CNT.SCAN_NEXT_CNT).

•

Scan remove is reported via the sticky event (LRN::EVENT_STICKY.SCAN_REMOVED_STICKY)

•

Scan match found is reported via the sticky event

(LRN::EVENT_STICKY.ROW_WITH_SCAN_ENTRY_STICKY).

3.22.4.1 Initiating a Port Move for a Specific FID

The following example initiates a port move for specific FID.

•

Move found entries:

Set LRN::SCAN_NEXT_CFG.SCAN_NEXT_MOVE_FOUND_ENA = 1.

•

Specify the FID filter:

Set LRN::SCAN_NEXT_CFG.FID_FILTER_ENA = 1.

Set LRN::MAC_ACCESS_CFG_0.MAC_ENTRY_FID = <FID value>.

•

Specify port filter:

Set LRN::SCAN_NEXT_CFG.ADDR_FILTER_ENA = 1.

Set LRN::MAC_ACCESS_CFG_2.MAC_ENTRY_ADDR_TYPE = 0 to specify address type

UPSID_PN.

Set LRN::MAC_ACCESS_CFG_2.MAC_ENTRY_ADDR = <UPSID, UPSPN> to specify UPSID and

UPSPN.

•

Specify the new address:

Set LRN::SCAN_NEXT_CFG_1.PORT_MOVE_NEW_ADDR = <new UPSID, new UPSPN>

Set LRN::SCAN_NEXT_CFG_1.SCAN_ENTRY_ADDR_MASK = all ones.

•

Scan through all rows by starting at row 0:

Set LRN::COMMON_ACCESS_CTRL.CPU_ACCESS_DIRECT_ROW = 0.

Set LRN::COMMON_ACCESS_CTRL.CPU_ACCESS_DIRECT_TYPE = 0.

•

Issue SCAN command:

Set LRN::COMMON_ACCESS_CTRL.CPU_ACCESS_CMD = 5.

Set LRN::COMMON_ACCESS_CTRL.MAC_TABLE_ACCESS_SHOT = 1.

•

Wait until LRN::COMMON_ACCESS_CTRL.MAC_TABLE_ACCESS_SHOT is cleared.

3.22.5

Forwarding Lookups

This section describes forwarding handling. The following table lists the applicable registers.

Remove

LRN::SCAN_NEXT_CFG.SCAN_NEXT_REMOVE_FOUND_E

Removes found entries.

CPU age scan

LRN::SCAN_NEXT_CFG.SCAN_NEXT_INC_AGE_BITS_ENA Performs CPU based age scan.

Aged entries. For example, entries

with AGE_FLAG equal to

maximum (configured in

ANA_L2::LRN_CFG.AGE_SIZE)

are removed and Non aged

entries, such as entries with

AGE_FLAG less than maximum,

gets the AGE_FLAG incremented.

Automatic Learning, page 181.

Table 113 •

Forwarding Registers

Target::Register.Field

Description

Replication

ANA_L2:COMMON:FWD_CFG

Configures common forwarding options

Table 112 •

Scan Modification Actions (continued)

Action Type

Target::Register.Field

Description

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