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Functional Descriptions

VMDS-10492 VSC7440 Datasheet Revision 4.2

185

A sticky status of all interrupt sources in the analyzer is available (ANA_L2::INTR.VCAP_S2_INTR), and

all interrupt source can individually be configured to trigger CPU interrupt (ANA_L2::INTR_ENA). The

current CPU interrupt status is available (ANA_L2::INTR_IDENT).

The following analyzer interrupt sources exist:

VCAP IS2 can be setup to trigger CPU interrupt (VCAP_S2_INTR) when an entry with enabled interrupt

is hit (VCAP IS2 action INTR_ENA).

It is possible to trigger interrupt (PORT_LRN_LIMIT_INTR) when learning on a port attempt to exceed a

configured port learn limit (configured in

ANA_L2:PORT_LIMIT:PORT_LIMIT_CTRL.PORT_LIMIT_EXCEED_IRQ_ENA).

It is possible to trigger interrupt (FID_LRN_LIMIT_INTR) when learning on a FID attempt to exceed a

configured limit (configured in ANA_L2:LRN_LIMIT:FID_LIMIT_CTRL.FID_LIMIT_EXCEED_IRQ_ENA).

LRN access to the MAC table can be configured to trigger interrupt (LRN_ACCESS_COMPLETE_INTR)

after completion. This is useful when multiple CPU scans must be performed as fast as possible, for

example, when sorting the MAC addresses extracted from the entire MAC table using SCAN commands.

For more information about using the SCAN command, see SCAN Command, page 176.

3.23

Analyzer Access Control Forwarding, Policing, and

Statistics

This section provides information about analyzer access control (ANA_AC) forwarding, policing, and

statistics.

3.23.1

Mask Handling

This section describes how a number of port masks are applied to ensure correct forwarding.

•

VLAN port mask from ANA_L3:VLAN. This mask is used to ensure frames are only forwarded within

a dedicated VLAN (or VSI if service forwarded). The VLAN mask handle protection by means of

hardware assisted updates. For more information, see VLAN Table Update Engine, page 129. The

VLAN mask can be modified by VCAP CLM full action MASK_MODE and by VCAP IS2 action

MASK_MODE.

•

PGID port mask from ANA_AC:PGID. This mask is based on the DMAC lookup in the PGID table.

One of the six flood PGID entries is used if the DMAC is unknown. For DMAC known in the MAC

table, the associated address is used to select the used PGID entry.

•

Source port mask from ANA_AC:SRC. This mask is used to ensure frames are never forwarded to

the port it was received on and the used entry is found by looking up the source port.

•

Global source port mask from ANA_AC:SRC. This mask is used to ensure frames are never

forwarded to the global port it was received on and the used entry is found by looking up the global

stacking source port.

•

Aggregation port mask from ANA_AC:AGGR. This mask is used to ensure frames are forwarded to

one port within each aggregate destination port.

•

REQ.port_mask and REQ.mask_mode. This mask is special in the sense that it is a general purpose

mask that can be used for various security features and protection. The mask is controlled by VCAP

CLM and VCAP IS2.

The following sections provide more information about the different port masks.

3.23.1.1 PGID Lookup

The following table lists the registers associated with PGID lookup.

Table 117 •

PGID Registers Overview

Target::Register.Field

Description

Replication

ANA_AC:PGID:PGID_MISC_CFG Configures how to interpret PGID_CFG and configures CPU

copy with associated CPU queue.

per PGID

ANA_AC:PGID:PGID_CFG

Configures destination port mask or destination {UPSID,PN}.

per PGID

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