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23 DHCP Snooping
The following figure shows the results of executing the
operation command.
Figure 23-16 Result of executing show ip dhcp snooping binding
> show ip dhcp snooping binding
Date 2008/11/13 13:09:31 UTC
Agent URL: flash
Last succeeded time: 2008/11/13 13:07:34 UTC
Total Bindings: 14
MAC Address
0000.0010.1010
0000.e228.15a9
:
:
>
(3) Checking DHCP snooping statistics
Use the
show ip dhcp snooping statistics
snooping statistics. The statistics include the total number of DHCP packets received on
untrusted ports, the number of DHCP packets received by each interface, the number of
DHCP packets filtered out, and the number of DHCP packets discarded due to being in
excess of the reception rate limit.
The following figure shows the results of executing the
statistics
Figure 23-17 Result of executing show ip dhcp snooping statistics
> show ip dhcp snooping statistics
Date 2008/11/13 18:19:28 UTC
Database Exceeded: 0
Total DHCP Packets: 8995
Interface
fastethernet
fastethernet
gigabitethernet 0/25
port-channel
>
23.3.3
Checking dynamic ARP inspection
(1) Checking the dynamic ARP inspection statistics
Use the
show ip arp inspection statistics
ARP inspection statistics. The statistics include the number of relayed ARP packets, the
number of dropped ARP packets, and details about the dropped ARP packets.
The following figure shows the results of executing the
statistics
Figure 23-18 Result of executing show ip arp inspection statistics
# show ip arp inspection statistics
Date 2008/11/14 13:09:52 UTC
430
IP Address
192.168.100.250 8
192.168.200.201 58
operation command.
Recv
0/1
0/3
1789
:
1
3646
operation command.
show ip dhcp snooping binding
Expire(min) Type
dynamic
dynamic
operation command to display the DHCP
show ip dhcp snooping
Filter
Rate over
170
170
10
:
0
0
2457
operation command to display the dynamic
show ip arp inspection
VLAN
Interface
10
fastethernet
10
fastethernet
0
1779
0
1189
0/7
0/8
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