xStack® DGS-3120 Series Managed Switch Web UI Reference Guide
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Offset
Chunk
Offset
Chunk0
Offset
Chunk1
Offset
Chunk2
Offset
Chunk3
Offset
Chunk4
Offset
Chunk5
Offset
Chunk6
Offset
Chunk7
Offset
Chunk8
Offset
Chunk9
Offset
Chunk10
Offset
Chunk11
Offset
Chunk12
Offset
Chunk13
Offset
Chunk14
Offset
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
Chunk
Offset
Chunk16
Offset
Chunk17
Offset
Chunk18
Offset
Chunk19
Offset
Chunk20
Offset
Chunk21
Offset
Chunk22
Offset
Chunk23
Offset
Chunk24
Offset
Chunk25
Offset
Chunk26
Offset
Chunk27
Offset
Chunk28
Offset
Chunk29
Offset
Chunk30
Offset
Chunk31
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
The following table indicates a completed ARP packet contained in Ethernet frame which is the pattern for the
calculation of packet offset.
Table 5 A Completed ARP Packet Contained in an Ethernet Frame
Command
Description
Step 1:
create access_profile_id 1
profile_name 1 ethernet source_mac
FF-FF-FF-FF-FF-FF ethernet_type
Create access profile 1 to match Ethernet Type and
Source MAC address.
Step 2:
config access_profile profile_id 1
add access_id 1 ethernet source_mac
01-02-03-04-05-06 ethernet_type
0x806 port 1-12 permit
Configure access profile 1
Only if the gateway’s ARP packet that contains the
correct Source MAC in the Ethernet frame can pass
through the switch.
Step 3:
create access_profile profile_id 2
profile_name 2 packet_content_mask
offset_chunk_1 3 0xFFFF
offset_chunk_2 7 0xFFFF
offset_chunk_3 8 0xFFFF0000
Create access profile 2
The first chunk starts from Chunk 3 mask for
Ethernet Type. (Blue in Table 6, 13th and 14th
bytes)
The second chunk starts from Chunk 7 mask for
Sender IP in ARP packet. (Green in Table 6, 29th
and 30th bytes)
The third chunk starts from Chunk 8 mask for
Sender IP in ARP packet. (Brown in Table 6, 31st
and 32nd bytes)
Step 4:
config access_profile profile_id 2
add access_id 1 packet_content
offset_chunk_1 0x806 offset_chunk_2
Configure access profile 2.
The rest of the ARP packets whose Sender IP claim
they are the gateway’s IP will be dropped.
Summary of Contents for DGS-3120-24PC-EI
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