Chapter 6 LAN Setup
P-870H/HW Series User’s Guide
80
The following table describes the fields in this screen.
Table 20
LAN > IP
LABEL
DESCRIPTION
LAN TCP/IP
Group Name
Select the interface group for which you want to configure the LAN
TCP/IP settings. See
for how to create a new
interface group.
IP Address
Enter the LAN IP address you want to assign to your ZyXEL Device in
dotted decimal notation, for example, 192.168.1.1 (factory default).
IP Subnet Mask
Type the subnet mask of your network in dotted decimal notation, for
example 255.255.255.0 (factory default).
DHCP Setup
Active DHCP
Select this to have the ZyXEL Device act as a DHCP server or DHCP
relay agent.
Otherwise, deselect this to not have the ZyXEL Device provide any
DHCP services. The DHCP server will be disabled.
DHCP Server
Select this option to have the ZyXEL Device assign IP addresses and
provide subnet mask, gateway, and DNS server information to the
network. The ZyXEL Device is the DHCP server for the network.
When the ZyXEL Device acts as a DHCP server, the following items
need to be set:
IP Pool
Starting
Address
This field specifies the first of the contiguous addresses in the IP
address pool.
Pool Size
This field specifies the size, or count of the IP address pool.
DHCP Relay
Select this option to have the ZyXEL Device forward DHCP request to
the DHCP server.
Relay Server
If you select DHCP Relay, enter the IP address of the DHCP server.
DNS Servers Assigned by DHCP Server
If you do not configure DNS servers, the ZyXEL Device uses its LAN IP address and tells
the DHCP clients on the LAN that itself is the DNS server. When a LAN client sends a DNS
query to the ZyXEL Device, the ZyXEL Device forwards the query to its system DNS server
you configured in the WAN screen.
First DNS
Server
Enter the first DNS (Domain Name System) server IP address the
ZyXEL Device passes to the DHCP clients.
Second DNS
Server
Enter the second DNS (Domain Name System) server IP address the
ZyXEL Device passes to the DHCP clients.
IGMP Snooping
Active IGMP
Snooping
Select this option to enable IGMP snooping. This allows the ZyXEL
Device to passively learn multicast group.
Standard
Mode
Select this to have the ZyXEL Device forward multicast packets to a
port that joins the multicast group and broadcast unknown multicast
packets from the WAN to all LAN ports.
Blocking Mode Select this to have the ZyXEL Device block all unknown multicast
packets from the WAN.
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
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
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
