D-Link DES-3550 Product Manual - Page 286
Table-6, Ethernet Header
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xStack® DES-3500 Series Layer 2 Stackable Fast Ethernet Managed Switch User Manual Offset Offset Offset Offset Offset Offset Offset Offset Offset Offset Offset Offset Offset Offset Offset Offset Offset Chunk Chunk0 Chunk1 Chunk2 Chunk3 Chunk4 Chunk5 Chunk6 Chunk7 Chunk8 Chunk9 Chunk10 Chunk11 Chunk12 Chunk13 Chunk14 Chunk15 Byte 127 3 7 11 15 19 23 27 31 35 39 43 47 51 55 59 Byte 128 4 8 12 16 20 24 28 32 36 40 44 48 52 56 60 Byte 1 5 9 13 17 21 25 29 33 37 41 45 49 53 57 61 Byte 2 6 10 14 18 22 26 30 34 38 42 46 50 54 58 62 Offset Offset Offset Offset Offset Offset Offset Offset Offset Offset Offset Offset Offset Offset Offset Offset Offset Chunk Chunk15 Chunk16 Chunk17 Chunk18 Chunk19 Chunk20 Chunk21 Chunk22 Chunk23 Chunk24 Chunk25 Chunk26 Chunk27 Chunk28 Chunk129 Chunk30 Byte 63 67 71 75 79 83 87 91 95 99 103 107 111 115 119 123 Byte 64 68 72 76 80 84 88 92 96 100 104 108 112 116 120 124 Byte 65 69 73 77 81 85 89 93 97 101 105 109 113 117 121 125 Byte 66 70 74 78 82 86 90 94 98 102 106 110 114 118 122 126 Table-6: Chunk and Packet offset Indicates a completed ARP packet contained in the Ethernet frame, which is the pattern for the calculation of packet offset. Ethernet Header ARP Destination Source address address Ethernet H/W type Protocol H/W Protocol Operation Sender Sender protocol Target Target type type address address H/W address H/W protocol length length address address address (6-byte) (6-byte) (2-byte) (2-byte) (2-byte) (1-byte) (1-byte) (2-byte) (6-byte) (4-byte) (6-byte) (4-byte) 01 02 03 04 05 06 0806 0a5a5a5a (10.90.90.90) Table-7: A completed ARP packet contained in Ethernet frame 271