Table 187: DHCP Snooping Persistent Configuration Fields
Field
Description
Store
The location of the DHCP snooping bindings database, which is either locally on
the device (Local) or on a remote system (Remote).
Remote IP Address
The IP address of the system on which the DHCP snooping bindings database
will be stored. This field is available only if Remote is selected in the Store field.
Remote File Name
The file name of the DHCP snooping bindings database in which the bindings are
stored. This field is available only if Remote is selected in the Store field.
Write Delay (Seconds)
The amount of time to wait between writing bindings information to persistent
storage. This allows the device to collect as many entries as possible (new and
removed) before writing them to the persistent file.
Click
Refresh
to refresh the page with the most current data from the switch.
DHCP Snooping Statistics
Use the DHCP Snooping Statistics page to view and clear per-interface statistics about the DHCP
messages filtered by the
snooping feature. Only interfaces that are enabled for DHCP snooping
and are untrusted appear in the table.
To access this page, click
Switching
>
DCHP Snooping
>
Base
>
Statistics
in the navigation menu.
Table 188: DHCP Snooping Statistics Fields
Field
Description
Interface
The interface associated with the rest of the data in the row.
MAC Verify Failures
The number of DHCP messages that were dropped because the source MAC
address and client hardware address did not match. MAC address verification is
performed only if it is globally enabled.
Client Ifc Mismatch
The number of packets that were dropped by DHCP snooping because the
interface and VLAN on which the packet was received does not match the
client's interface and VLAN information stored in the binding database.
DHCP Server Msgs Received
The number of DHCP server messages (DHCPOFFER, DHCPACK, DHCPNAK,
DHCPRELEASEQUERY) that have been dropped on an untrusted port.
Clear Counters (Button)
To reset the statistics to zero for one or more interfaces, select each interface
with the data to reset and click Clear Counters. You must confirm the action
before the entry is deleted.
Click
Refresh
to refresh the page with the most current data from the switch.
DHCP L2 Relay Global Configuration
Use the DHCP L2 Relay Global Configuration page to control the administrative mode of
Layer 2
Relay on the device. In Layer 2 switched networks, there may be one or more infrastructure devices (for
example, a switch) between the client and the Layer 3 Relay agent/DHCP server. In this instance, some
of the client device information required by the Layer 3 Relay agent may not be visible to it. When this
Configuring Switching Information
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