VSC7440 datasheet(99/444 Pages) MICROSEMI

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Functional Descriptions

VMDS-10492 VSC7440 Datasheet Revision 4.2

IGR_PORT_MASK_SEL

Mode selector for IGR_PORT_MASK.

0: Default setting.

1: Set for frames received from a loopback device, i.e. LBK_DEV*.

2: Set for masqueraded frames if

ANA_CL::CLM_MISC_CTRL.MASQ_IGR_MASK_ENA == 1.

A masqueraded frame is identified by the following criteria:

(ifh.fwd.dst_mode == inject && ifh.src_port != physical_src_port)

(misc.pipeline_act == inj_masq)

3: Set for the following frame types:

3.a: CPU injected frames and

ANA_CL::CLM_MISC_CTRL.CPU_IGR_MASK_ENA == 1.

3.b: Frames received from VD0 or VD1 and

ANA_CL::CLM_MISC_CTRL.VD_IGR_MASK_ENA == 1.

3.c: Frame received on a loopback device and

ANA_CL::CLM_MISC_CTRL.LBK_IGR_MASK_SEL3_ENA == 1.

If a frame fulfills multiple of above criteria, then higher value of

IGR_PORT_MASK_SEL takes precedence.

2x x

IGR_PORT_MASK

Ingress port mask.

IGR_PORT_MASK_SEL == 0:

Each bit in the mask correspond to physical ingress port.

IGR_PORT_MASK_SEL == 1:

Each bit in the mask correspond to the physical port which the frame

was looped on.

IGR_PORT_MASK_SEL == 2:

Each bit in the mask correspond to the masqueraded port.

If IGR_PORT_MASK_SEL == 3:

Bit 0: Physical src port == CPU0.

Bit 1: Physical src port == CPU1.

Bit 2: Physical src port == VD0.

Bit 3: Physical src port == VD1.

Bits 4:9: Src port (possibly masqueraded).

Bits 44:48: ifh.misc.pipeline_pt.

Bits 49:51: ifh.misc.pipeline_act.

Bits 52: Reserved.

x x

L2_MC

Set if frame’s destination MAC address is a multicast address (bit 40 =

1).

1x x

L2_BC

Set if frame’s destination MAC address is the broadcast address

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

1x x

Table 62 •

VCAP CLM X8 Key Details (continued)

Field Name

Description

Size

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