VSC7440 datasheet(224/444 Pages) MICROSEMI

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Functional Descriptions

VMDS-10492 VSC7440 Datasheet Revision 4.2

207

To debug network problems, selected traffic can be mirrored using configurable probes, to a mirror port

where a frame analyzer can be attached to analyze the frame flow.

The device has three independent mirroring probes. Each probe can be configured with a separate set of

filtering conditions that must be fulfilled before traffic is mirrored. If multiple filtering conditions are

enabled for a given probe they must all be fulfilled before mirroring occurs. For example, mirror probe 1

can be set up to only Rx mirror traffic from a given host in a specific VLAN, whereas probe 2 can be set

up to mirror frames matching criteria in VCAP IS2. If a frame is mirrored by more than one mirror probe,

the highest numbered probe is selected. This implies that only one mirror copy is made per frame, even

if multiple probes are active.

The following traffic mirror conditions can be configured per probe:

•

All frames received on a given port, also known as ingress mirroring (enabled in

ANA_AC:MIRROR_PROBE[x].PROBE_CFG.PROBE_DIRECTION(1) = 1 and ports to be RX

mirrored set in ANA_AC:MIRROR_PROBE[x].PROBE_PORT_CFG)

•

All frames transmitted on a given port, also known as egress mirroring (enabled in

ANA_AC:MIRROR_PROBE[x].PROBE_CFG.PROBE_DIRECTION(0) = 1 and ports to be TX

mirrored set in ANA_AC:MIRROR_PROBE[x].PROBE_PORT_CFG)

•

All frames sent to a specific CPU port (may be useful for software debugging) (enabled in

ANA_AC:MIRROR_PROBE[x].PROBE_CFG.PROBE_DIRECTION(0) = 1 and CPU ports to be

mirrored set in ANA_AC:MIRROR_PROBE[x].PROBE_CFG.PROBE_CPU_SET)

•

All frames classified to specific a VID (enabled in ANA_AC:MIRROR_PROBE[x]. PROBE_CFG.

PROBE_VLAN_MODE == 2 and VID set in

ANA_AC:MIRROR_PROBE[x].PROBE_CFG.PROBE_VID)

•

All frames classified to VLANs with VLAN->VLAN_MIRROR_ENA set (enabled in

ANA_AC:MIRROR_PROBE[x].PROBE_CFG.PROBE_VLAN_MODE== 1).

•

All frames received from a known station with MAC->MIRROR set (enabled in

ANA_AC:MIRROR_PROBE[x].PROBE_CFG.PROBE_MAC_MODE(1)= 1).

•

All frames send to a known station with MAC->MIRROR set (enabled in

ANA_AC:MIRROR_PROBE[x].PROBE_CFG. PROBE_MAC_MODE(0) = 1). This can also be

flooded traffic (enabled via ANA_L2::FWD_CFG.FLOOD_MIRROR_ENA).

•

Frames selected through configured VCAP entries (enabled by VCAP IS2 action

MIRROR_PROBE). For such frames, the only other applicable mirror criteria is

PROBE_DIRECTION.

•

All frames received from CPU, also known as CPU ingress mirroring (enabled in

ANA_AC:MIRROR_PROBE[x].PROBE_CFG.PROBE_DIRECTION(1) = 1 and CPU ports to be RX

mirrored set in ANA_AC:MIRROR_PROBE[x].PROBE_RX_CPU_AND_VD).

The mirror port configured per probe (QFWD:SYSTEM:FRAME_COPY_CFG[8-11]) can be any port on

the device, including the CPU.

Rx-mirrored traffic sent to the mirror port is sent as received optionally with an additional Q-tag (enabled

in REW::MIRROR_PROBE_CFG.REMOTE_MIRROR_CFG).

ANA_AC:MIRROR_PROBE:PROBE

_CFG.PROBE_PHYS_RX_PORT

Configures if Rx mirroring mirrors physical or masqueraded port.3

ANA_AC:MIRROR_PROBE:PROBE

_CFG.PROBE_RX_CPU_AND_VD

Configures Rx mirror mask for CPU ports and VD ports.

ANA_AC:MIRROR_PROBE:PROBE

_PORT_CFG

Configures mirroring of the ingress ports for

PROBE_DIRECTION = RX_MIRROR and/or the set of egress

ports for PROBE_DIRECTION = TX_MIRROR.

ANA_AC:MIRROR_PROBE:PROBE

_PORT_CFG1

See PROBE_PORT_CFG.

QFWD:SYSTEM:FRAME_COPY_

CFG[9-11]

Configures forwarding options per probe.

Table 133 •

ANA_AC Mirror Registers Overview (continued)

Target::Register.Field

Description

Replication

VSC7440 Datasheet(PDF) 224 Page - Microsemi Corporation

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