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3. Reload the system.
EXEC Privilege
reload
4. Enable IP+MAC SAV.
INTERFACE mode
ip dhcp source-address-validation ipmac
The system creates an ACL entry for each IP+MAC address pair in the binding table and applies it to the
interface.
To display the IP+MAC ACL for an interface for the entire system, use the show ip dhcp snooping
source-address-validation [interface] command in EXEC Privilege mode.
Viewing the Number of SAV Dropped Packets
The following output of the show ip dhcp snooping source-address-validation discard-
counters
command displays the number of SAV dropped packets.
Dell>show ip dhcp snooping source-address-validation discard-counters
deny access-list on TenGigabitEthernet 1/1
Total cam count 1
deny count (0 packets)
deny access-list on TenGigabitEthernet 1/2
Total cam count 2
deny vlan 10 count (0 packets)
deny vlan 20 count (0 packets)
The following output of the show ip dhcp snooping source-address-validation discard-
counters interface
interface command displays the number of SAV dropped packets on a
particular interface.
Dell>show ip dhcp snooping source-address-validation discard-counters interface
TenGigabitEthernet 1/1
deny access-list on TenGigabitEthernet 1/1
Total cam count 2
deny vlan 10 count (0 packets)
deny vlan 20 count (0 packets)
Clearing the Number of SAV Dropped Packets
To clear the number of SAV dropped packets, use the clear ip dhcp snooping source-address-
validation discard-counters
command.
Dell>clear ip dhcp snooping source-address-validation discard-counters
To clear the number of SAV dropped packets on a particular interface, use the clear ip dhcp
snooping source-address-validation discard-counters interface interface command.
Dell>clear ip dhcp snooping source-address-validation discard-counters
interface TenGigE 0/1
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Dynamic Host Configuration Protocol (DHCP)