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16
STEP 3
STEP 4
NOTE
STEP 1
STEP 2
STEP 3
321
Select the port/LAG and click Edit. Select Enable in the IP Source Guard field to enable IP
Source Guard on the interface.
Click Apply to copy the setting to the Running Configuration file.
Binding Database
IP Source Guard uses the DHCP Snooping Binding database to check packets from untrusted
ports. If the device attempts to write too many entries to the DHCP Snooping Binding
database, the excessive entries are maintained in an inactive status. Entries are deleted when
their lease time expires and so inactive entries may be made active.
See
DHCP
Snooping/Relay<350-550>.
The Binding Database page only displays the entries in the DHCP Snooping Binding database
defined on IP-Source-Guard-enabled ports.
To view the DHCP Snooping Binding database and see TCAM usage, set Insert Inactive:
Click Security > IP Source Guard > Binding Database.
The DHCP Snooping Binding database uses TCAM resources for managing the database.
Complete the Insert Inactive field to select how frequently the device should attempt to
activate inactive entries. It has the following options:
•
Retry Frequency—The frequency with which the TCAM resources are checked.
•
Never-Never try to reactivate inactive addresses.
Click Apply to save the above changes to the Running Configuration and/or Retry Now to
check TCAM resources.
The entries in the Binding database are displayed:
•
VLAN ID—VLAN on which packet is expected.
•
MAC Address—MAC address to be matched.
•
IP Address—IP address to be matched.
•
Interface—Interface on which packet is expected.
•
Status—Displays whether interface is active.
•
Type—Displays whether entry is dynamic or static.
•
Reason—If the interface is not active, displays the reason. The following reasons are
possible:
Cisco Sx350, SG350X, SG350XG, Sx550X & SG550XG Series Managed Switches, Firmware Release 2.2.5.x
Security
IP Source Guard
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