VSC7440 datasheet(172/444 Pages) MICROSEMI

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Functional Descriptions

VMDS-10492 VSC7440 Datasheet Revision 4.2

155

ARP_OPCODE_UNKNOW

Set if ARP opcode is none of the below mentioned. 1

ARP_OPCODE

ARP opcode.

Only valid if ARP_OPCODE_UNKNOWN is

cleared.

0: ARP request.

1: ARP reply.

2: RARP request.

3: RARP reply.

L3_OPTIONS

Set if IPv4 frame contains options (IP len > 5). IP

options are not parsed.

1x x

L3_TTL_GT0

Set if IPv4 TTL / IPv6 hop limit is greater than 0.

x xx

L3_TOS

Frame’s IPv4/6 DSCP and ECN fields.

x x

L3_IP4_DIP

IPv4 frames: Destination IPv4 address.

IPv6 frames: Source IPv6 address, bits 63:32.

xxx

L3_IP4_SIP

IPv4 frames: Source IPv4 address.

IPv6 frames: Source IPv6 address, bits 31:0.

xxx

L3_IP6_DIP

IPv6 frames: Destination IPv6 address.

IPv4 frames: Bits 31:0: Destination IPv4 address.

128

x x

L3_IP6_SIP

IPv6 frames: Destination IPv6 address.

IPv4 frames: Bits 31:0: Destination IPv4 address.

In addition, for IP_7TUPLE and IPv4 frames:

Bit 127: L3_FRAGMENT.

Bit 126: L3_FRAG_OFS_GT0.

Bit 125: L3_OPTIONS.

128

x x

DIP_EQ_SIP

Set if destination IP address is equal to source IP

address.

xxx

L3_IP_PROTO

IPv4 frames (IP4 = 1): IP protocol.

IPv6 frames (IP4 = 0): Next header.

TCP_UDP

Frame type flag indicating the frame is a TCP or

UDP frame.

Set if frame is IPv4/IPv6 TCP or UDP frame (IP

protocol/next header equals 6 or 17).

TCP

Frame type flag indicating the frame is a TCP

frame.

Set if frame is IPv4 TCP frame (IP protocol = 6) or

IPv6 TCP frames (Next header = 6)

L4_DPORT

TCP/UDP destination port.

Overloading for IP_7TUPLE:

Non-TCP/UDP IP frames:

L4_DPORT = L3_IP_PROTO.

L4_SPORT

TCP/UDP source port.

Table 96 •

VCAP IS2 Key Overview (continued)

Field Name

Description

Size

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