VSC7440 datasheet(101/444 Pages) MICROSEMI

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Functional Descriptions

VMDS-10492 VSC7440 Datasheet Revision 4.2

DST_ENTRY

Selects whether the frame’s destination or source information is used

for fields L2_SMAC and L3_IP4_SIP.

If set, L2_SMAC contains the frame’s destination MAC address and

L3_IP4_SIP contains the frame’s destination IP address. The setting

is controlled by ANA_CL::ADV_CL_CFG and

VCPA_CLM_action.NXT_KEY_TYPE.

L2_DMAC

Destination MAC address.

L2_SMAC

Source MAC address.

Note that - optionally - L2_SMAC may contain the destination MAC

address, see DST_ENTRY.

x x

IP_MC

IPv4 frames: Set if frame’s destination IP address is an IPv4 multicast

address (0xE /4).

IPv6 frames: Set if frame’s destination IP address is an IPv6 multicast

address (0xFF /8).

1x x

ETYPE_LEN

Frame type flag indicating that the frame is EtherType encoded.

Set if frame has EtherType >= 0x600.

1x x

ETYPE

Overloaded field for different frame types:

LLC frames (ETYPE_LEN=0 and IP_SNAP=0):

ETYPE = [DSAP, SSAP]

SNAP frames (ETYPE_LEN=0 and IP_SNAP=1):

ETYPE = PID[4:3] from SNAP header

TCP/UDP IPv4 or IPv6 frames (ETYPE_LEN=1, IP_SNAP=1, and

TCP_UDP=1):

ETYPE = TCP/UDP destination port

Non-TCP/UDP IPv4 or IPv6 frames (ETYPE_LEN=1, IP_SNAP=1,

and TCP_UDP=0):

ETYPE = IP protocol

Other frames (ETYPE_LEN=1 and IP_SNAP=0):

ETYPE = Frame’s EtherType.

x x

IP_SNAP

Frame type flag indicating that the frame is either an IP frame or a

SNAP frame.

IP frames (ETYPE_LEN=1):

Set if (EtherType= 0x0800 and IP version = 4) or

(ETYPE = 0x86DD and IP version = 6)

SNAP frames (ETYPE_LEN=0):

Set if LLC header contains AA-AA-03.

1x x

IP4

Frame type flag indicating the frame is an IPv4 frame.

Set if frame is IPv4 frame (EtherType = 0x800 and IP version = 4).

xxx

Table 62 •

VCAP CLM X8 Key Details (continued)

Field Name

Description

Size

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