VSC7511 datasheet(99/324 Pages) MICROSEMI

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Functional Descriptions

VMDS-10488 VSC7511 Datasheet Revision 4.2

Frames with IP options (L3_OPTIONS set to 1 in key) or fragmented frames, which are not the initial

fragment (L3_FRAG_OFS_GT0 set to 1 in key), do not carry Layer-4 information. The Layer-4 fields in

the key (L4_SPORT, L4_DPORT, L4_RNG, SPORT_EQ_DPORT, SEQUENCE_EQ0, L4_FIN, L4_SYN,

L4_RST, L4_PSH, L4_ACK, L4_URG, L4_1588_DOM, and L4_1588_VERSION) are automatically set to

don’t care.

L4_SYN

168

TCP: TCP flag SYN.

PTP over UDP: messageType bit 2.

L4_RST

169

TCP: TCP flag RST.

PTP over UDP: messageType bit 3.

L4_PSH

170

TCP: TCP flag PSH.

PTP over UDP: flagField bit 1 (twoStepFlag).

L4_ACK

171

TCP: TCP flag ACK.

PTP over UDP: flagField bit 2 (unicastFlag).

L4_URG

172

TCP: TCP flag URG.

PTP over UDP: flagField bit 7 (reserved).

L4_1588_DOM

173

PTP over UDP: domainNumber.

L4_1588_VERSION

181

PTP over UDP: version.

Table 52 •

IS2 IP4_OTHER Key

Field Name

Bit

Width

Description

Layer-3 Information

IP4

Set if frame is IPv4 frame.

IPv6 frames can also use IP4_OTHER entries when

IP6_STD entries are disabled.

L3_FRAGMENT

Set if IP frame is fragmented (More Fragments flag=1

or Fragments Offset > 0)

L3_FRAG_OFS_GT0 48

Set if IP frame is fragmented and if it is not the first

fragment (Fragments Offset > 0).

L3_OPTIONS

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

options are not skipped nor parsed, which implies that

L3_PAYLOAD contains data from the IP options for

IPv4 frames with IP options.

L3_TTL_GT0

Set if IP TTL is greater than 0.

L3_TOS

IP TOS field.

L3_IP4_DIP

IPv4 frames: Destination IPv4 address.

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

L3_IP4_SIP

IPv4 frames: Source IPv4 address.

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

DIP_EQ_SIP

123

Set if source IP address is equal to destination IP

address. Full addresses are checked, also for IPv6.

L3_PROTO

124

IPv4: IP protocol.

IPv6: next header.

L3_PAYLOAD

132

Bytes 0-6 after IP header.

Table 51 •

IS2 IP4_TCP_UDP Key (continued)

Field Name

Bit

Width

Description

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