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Chapter 26 IP Source Guard
still available after a restart. To open this screen, click Advanced Application > IP Source Guard
> DHCP Snooping > Configure.
Figure 152 DHCP Snooping Configure
The following table describes the labels in this screen.
Table 113 DHCP Snooping Configure
LABEL
Active
DHCP Vlan
Database
Agent URL
Timeout
interval
258
DESCRIPTION
Select this to enable DHCP snooping on the Switch. You still have to enable DHCP snooping
on specific VLAN and specify trusted ports.
Note: If DHCP is enabled and there are no trusted ports, DHCP requests will not succeed.
Select a VLAN ID if you want the Switch to forward DHCP packets to DHCP servers on a
specific VLAN.
Note: You have to enable DHCP snooping on the DHCP VLAN too.
You can enable Option82 in the DHCP Snooping VLAN Configure screen
on page
260) to help the DHCP servers distinguish between DHCP requests from different
VLAN.
Select Disable if you do not want the Switch to forward DHCP packets to a specific VLAN.
If Timeout interval is greater than Write delay interval, it is possible that the next
update is scheduled to occur before the current update has finished successfully or timed
out. In this case, the Switch waits to start the next update until it completes the current
one.
Enter the location of the DHCP snooping database. The location should be expressed like
this: tftp://{domain name or IP address}/directory, if applicable/file name; for
example, tftp://192.168.10.1/database.txt.
Enter how long (10-65535 seconds) the Switch tries to complete a specific update in the
DHCP snooping database before it gives up.
(Section 26.5.2
VES1724-56 User's Guide
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