VSC7440 datasheet(222/444 Pages) MICROSEMI

222 / 444 page

Functional Descriptions

VMDS-10492 VSC7440 Datasheet Revision 4.2

205

•

ip_multicast_rpf_discarded - frame discarded due to failed Reverse Path Forwarding check (frame

not received from configured interface)

•

ip_TTL_discarded - frame discarded due to TTL <2.

There is one common event mask for each of the eight IRLEG counter types

(ANA_AC:STAT_GLOBAL_CFG_IRLEG:STAT_GLOBAL_EVENT_MASK).

Egress router leg counter events that can trigger counting can be selected among the following events:

•

acl_discarded - frame applicable for routing but discarded due to VCAP IS2 egress discard action

(second VCAP IS2 lookup with action RT_ENA cleared).

•

unicast_routed traffic - frame is unicast routed.

•

multicast_routed traffic - frame is multicast routed.

•

ip_multicast_switched traffic - frame is bridged within ingress VLAN.

•

ip_multicast_TTL_discarded - frame discarded due to TTL less than ERLEG configured TTL value.

There is a common event mask for each of the eight ERLEG counter types

(ANA_AC:STAT_GLOBAL_CFG_ERLEG:STAT_GLOBAL_EVENT_MASK).

Each 40-bit counter consists of an MSB part (ANA_AC:STAT_CNT_CFG_IRLEG.STAT_MSB_CNT or

ANA_AC:STAT_CNT_CFG_ERLEG.STAT_MSB_CNT) and an LSB part

(ANA_AC:STAT_CNT_CFG_IRLEG.STAT_LSB_CNT or

ANA_AC:STAT_CNT_CFG_ERLEG.STAT_LSB_CNT). The MSB part of the counter is latched to a

shadow register when the LSB part is read. As a result, the LSB part must always be read first, and the

MSB part must be read immediately after the LSB part. When writing to the counter, the MSB part must

be written first, followed by the LSB part.

3.23.4

Analyzer sFlow Sampling

This section describes sFlow sampling. The applicable registers are listed in the following table.

sFlow is a standard for monitoring-high speed switched networks through statistical sampling of incoming

and outgoing frames. Each port in the device can be set up as an sFlow agent monitoring the particular

link and generating sFlow data. If a frame is sFlow sampled, it is copied to the sFlow CPU extraction

queue (ANA_AC::SFLOW_CFG.SFLOW_CPU_QU).

An sFlow agent is configured through ANA_AC::SFLOW_CFG with the following options:

•

SFLOW_SAMPLE_RATE specifies the probability that the sampler copies a frame to the CPU. Each

frame being candidate for the sampler has the same probability of being sampled. The probability is

set in steps of 1/32768.

•

SFLOW_DIR_SEL(0) enables incoming frames on the port as candidates for the sampler.

•

SFLOW_DIR_SEL(1) enables outgoing frames on the port as candidates for the sampler. When Tx

sampling is used, the Sample ID must be set in the sFlow stamp to enable the CPU to determine the

sFlow sampler sampled by the frame

(ANA_AC::PS_COMMON_CFG.SFLOW_SMPLE_ID_IN_STAMP_ENA).

Table 132 •

Analyzer sFlow Registers Overview

Target::Register.Field

Description

Replication

ANA_AC::PS_COMMON_CFG.SFLOW_ENA

Controls sFlow operation.

ANA_AC::PS_COMMON_CFG.SFLOW_SMPL_ID

_IN_STAMP_ENA

Configures sFlow sampler ID (port number) as part

of stamp sent to CPU.

ANA_AC::SFLOW_CFG.SFLOW_CPU_QU

Configures CPU extraction queue for sFlow

sampled frames.

ANA_AC::SFLOW_CTRL

Configures sFlow samplers (rate and type).

Per port

ANA_AC::SFLOW_CNT

Current sFlow sampler count values.

Per port

ANA_AC:PS_STICKY:STICKY

Various sticky debug events.

ANA_AC:PS_STICKY_MASK:STICKY_MASK

Mask to allow debug events to be counted in port

stat block.

VSC7440 датащи(PDF) 222 Page - Microsemi Corporation

VSC7440 датащи(HTML) 222 Page - Microsemi Corporation

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 ...More

датащи скачать

ссылки URL