VSC7440 datasheet(176/444 Pages) MICROSEMI

176 / 444 page

Functional Descriptions

VMDS-10492 VSC7440 Datasheet Revision 4.2

159

REW_CMD

REW_CMD[1:0] - PTP command:

0: No command.

1: ONE-STEP update. Update PTP PDU according to ingress and egress port mode.

2: TWO-STEP stamping. Send frame untouched, but store ingress and egress time

stamps in the time stamp FIFO.

3: TIME-OF-DAY update. Fill system time-of-day into frame.

REW_CMD[3:2] - Delay command:

0: No command.

1: Add configured egress delay for the egress port (REW::PTP_EDLY_CFG).

2: Add configured ingress delay for the ingress port (REW::PTP_IDLY1_CFG).

3: Add configured ingress delay for the ingress port (REW::PTP_IDLY2_CFG).

REW_CMD[5:4] - Sequence number and time stamp command:

0: No command.

1: Fill in sequence number and increment. Sequence number is selected by IFH.TSTAMP.

2: Enable Delay_Req/resp processing. This mode includes updating the

requestReceiptTimestamp with the ingress time stamp.

3: Enable Delay_Req/resp processing. This mode excludes updating the

requestReceiptTimestamp.

Note that if REW_CMD[5] is set, REW_CMD[5:4] is cleared by ANA_ACL before passing

the REW_CMD action to the rewriter.

REW_CMD[6]: If set, set DMAC to incoming frame’s SMAC.

REW_CMD[7]: If set, set SMAC to configured value for the egress port.

TTL_UPDATE_ENA If set, IPv4 TTL or IPv6 hop limit is decremented.

Overloading:

If ACL_RT_MODE[3]=1 (SWAPPING) and ACL_RT_MODE[2:0]=4, 5, 6, or 7, the IPv4

TTL or IPv6 hop limit is preset to value configured in ANA_ACL::SWAP_IP_CTRL.

SAM_SEQ_ENA

If set, ACL_RT_MODE only applies to frames classified as SAM_SEQ.

Overloading:

If ACL_RT_MODE=0x8 (replace DMAC): If set,

ANA_ACL::SWAP_IP_CTRL.DMAC_REPL_OFFSET_VAL controls number of bits in

frame’s DMAC, counting from MSB, to replace with corresponding bits in ACL_MAC.

TCP_UDP_ENA

If set, TCP/UDP ports are set to new values: DPORT = MATCH_ID, SPORT =

MATCH_ID_MASK.

MATCH_ID

Logical ID for the entry. The MATCH_ID is extracted together with the frame if the frame is

forwarded to the CPU (CPU_COPY_ENA). The result is placed in IFH.CL_RSLT.

Overloading: If TCP_UDP_ENA is set, MATCH_ID defines new DPORT.

MATCH_ID_MASK Mask used by MATCH_ID.

Overloading:

If TCP_UDP_ENA is set, MATCH_ID defines new SPORT.

CNT_ID

Counter ID, used per lookup to index the 4K frame counters (ANA_ACL:CNT_TBL).

Multiple VCAP IS2 entries can use the same counter.

SWAP_MAC_ENA Swap MAC addresses.

Overloading:

If REW_CMD[5]=1: For multicast Delay_Resp frames, SWAP_MAC_ENA and

LOG_MSG_INT encodes a new logMessageInterval. See LOG_MSG_INT.

Table 97 •

VCAP IS2 Actions (continued)

Action Name

Description

Size

VSC7440 датащи(PDF) 176 Page - Microsemi Corporation

VSC7440 датащи(HTML) 176 Page - Microsemi Corporation

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 ...More

датащи скачать

ссылки URL