Chapter 9 VLAN
ES3500 Series User’s Guide
109
9.8 Protocol Based VLANs
Protocol based VLANs allow you to group traffic into logical VLANs based on the protocol you
specify. When an upstream frame is received on a port (configured for a protocol based VLAN), the
Switch checks if a tag is added already and its protocol. The untagged packets of the same protocol
are then placed in the same protocol based VLAN. One advantage of using protocol based VLANs is
that priority can be assigned to traffic of the same protocol.
Note: Protocol based VLAN applies to un-tagged packets and is applicable only when you
use IEEE 802.1Q tagged VLAN.
For example, ports 1, 2, 3 and 4 belong to static VLAN 100, and ports 4, 5, 6, 7 belong to static
VLAN 120. You can configure a protocol based VLAN A with priority 3 for ARP traffic received on port
1, 2 and 3. You can also have a protocol based VLAN B with priority 2 for Apple Talk traffic received
on port 6 and 7. All upstream ARP traffic from port 1, 2 and 3 will be grouped together, and all
upstream Apple Talk traffic from port 6 and 7 will be in another group and have higher priority than
ARP traffic when they go through the uplink port to a backbone switch C.
Figure 46
Protocol Based VLAN Application Example
Index
This is the index number identifying this subnet based VLAN. Click on any of these numbers
to edit an existing subnet based VLAN.
Active
This field shows whether the subnet based VLAN is active or not.
Name
This field shows the name the subnet based VLAN.
IP
This field shows the IP address of the subnet for this subnet based VLAN.
Mask-Bits
This field shows the subnet mask in bit number format for this subnet based VLAN.
VID
This field shows the VLAN ID of the frames which belong to this subnet based VLAN.
Priority
This field shows the priority which is assigned to frames belonging to this subnet based
VLAN.
Delete
Click this to delete the subnet based VLANs which you marked for deletion.
Cancel
Click Cancel to begin configuring this screen afresh.
Table 25
Advanced Application > VLAN > VLAN Port Setting > Subnet Based VLAN Setup
LABEL
DESCRIPTION
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
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
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207
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215
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219
220
221
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223
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225
226
227
228
229
230
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234
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238
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244
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246
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255
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259
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261
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271
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284
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286
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295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
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