ZyXEL Communications GS1920-48HPv2, Руководство пользователя

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Chapter 6 Tutorials
GS1920v2 Series User’s Guide
63
7
Go to
Adva nc e d Applic a tio n
>
IP So urc e G ua rd
>
IPv4 So urc e G ua rd Se tup
>
DHC P Sno o ping
>
C o nfig ure
>
VLAN
, show VLAN 100 by entering 100 in the
Sta rt VID
and
End VID
fields and click
Apply
.
Then select
Ye s
in the
Ena b le d
field of the VLAN 100 entry shown at the bottom section of the screen.
If you want to add more information in the DHCP request packets such as source VLAN ID or system
name, you can also select an
O ptio n82 Pro file
in the entry. See Section 26.11.1.3 on page 256 .
Fig ure 43
Tutorial: Enable DHCP Snooping on this VLAN
8
Click
Sa ve
at the top right corner of the web configurator to
save the configuration permanently.
9
Connect your DHCP server to port 5 and a computer (as DHCP client) to either port 6 or 7. The computer
should be able to get an IP address from the DHCP server. If you put the DHCP server on port 6 or 7, the
computer will not able to get an IP address.
10
To check if DHCP snooping works, go to
Adva nc e d Applic a tio n
>
IP So urc e G ua rd > IPv4 So urc e G ua rd
Se tup
, you should see an IP assignment with the type
DHC P- Sno o ping
as shown.
Fig ure 44
Tutorial: Check the Binding If DHCP Snooping Works
You can also telnet. Use the command “
show dhcp snooping binding
” to see the DHCP snooping
binding table as shown next.
6.3 Ho w to Use DHC Pv4 Re la y o n the Switc h
This tutorial describes how to configure your Switch to forward DHCP client requests to a specific DHCP
server. The DHCP server can then assign a specific IP address based on the information in the DHCP
requests.
sysname# show dhcp snooping binding
MacAddress IpAddress Lease Type VLAN Port
----------------- --------------- ------------ ------------- ---- -----
00:02:00:00:00:1c 10.10.1.16 6d23h59m20s dhcp-snooping 100 7
Total number of bindings: 1