Cisco SPS208G User Manual page 135

Security Suite
DHCP Snooping
SPS208G/SPS224G4/SPS2024 Service Provider Switches User Guide
specifies the port number from which the client's packet was received.
This is the default value.
-
Unchecked
— Disables DHCP Option 82 with data insertion on the
device.
•
Enable Verify MAC Address — Enables or disables MAC address
verification. The possible field values are:
-
Checked
— Verifies that an untrusted port source MAC address
matches the MAC address in the packet. This is the default value.
-
Unchecked
— Disables verification that an untrusted port source MAC
address matches the MAC address in the packet.
•
Enable Backup Database — Enables or disables the DHCP Snooping
Database. The possible field values are:
-
Checked
— Enables storing allotted IP addresses in the DHCP Snooping
Database in flash memory.
-
Unchecked
— Disables storing allotted IP addresses in the DHCP
Snooping Database. This is the default value.
•
Database Update Interval — Indicates how often the DHCP Snooping
Database is updated. The possible field range is 600 – 86400 seconds. The
field default is 1200 seconds.
•
IP Source Guard — Indicates if IP Source Guard is enabled on the device.
The possible field values are:
-
Checked
— Enable IP Source Guard on the device.IP source guard stops
malignant network users from using unallocated network IP addresses. IP
Source Guard ensures that only packets with an IP address stored in the DHCP
Database are forwarded. IP address stored in the DHCP Snooping Database
are either statically configured by the network administrator or are retrieved
using DHCP. IP source guard can be enabled only on DHCP snooping untrusted
interface.
-
Unchecked
— Disables IP Source Guard on the device. This is the
default value.
•
Check Availability — TBD
-
Retry — TBD
-
Frequency — TBD
-
Never— TBD
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