Cisco Catalyst 3750-X Command Reference

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Catalyst 3750-X and 3560-X Switch Command Reference
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Chapter 2 Catalyst 3750-X and 3560-X Switch Cisco IOS Commands
show ip dhcp snooping statistics
Table 2-36 DHCP Snooping Statistics
DHCP Snooping Statistic Description
Packets Processed by DHCP Snooping Total number of packets handled by DHCP snooping,
including forwarded and dropped packets.
Packets Dropped Because IDB not known Number of errors when the input interface of the packet
cannot be determined.
Queue full Number of errors when an internal queue used to process
the packets is full. This might happen if DHCP packets are
received at an excessively high rate and rate limiting is not
enabled on the ingress ports.
Interface is in errdisabled Number of times a packet was received on a port that has
been marked as error disabled. This might happen if
packets are in the processing queue when a port is put into
the error-disabled state and those packets are subsequently
processed.
Rate limit exceeded Number of times the rate limit configured on the port was
exceeded and the interface was put into the error-disabled
state.
Received on untrusted ports Number of times a DHCP server packet (OFFER, ACK,
NAK, or LEASEQUERY) was received on an untrusted
port and was dropped.
Nonzero giaddr Number of times the relay agent address field (giaddr) in
the DHCP packet received on an untrusted port was not
zero, or the no ip dhcp snooping information option
allow-untrusted global configuration command is not
configured and a packet received on an untrusted port
contained option-82 data.
Source mac not equal to chaddr Number of times the client MAC address field of the
DHCP packet (chaddr) does not match the packet source
MAC address and the ip dhcp snooping verify
mac-address global configuration command is
configured.
Binding mismatch Number of times a RELEASE or DECLINE packet was
received on a port that is different than the port in the
binding for that MAC address-VLAN pair. This indicates
someone might be trying to spoof the real client, or it could
mean that the client has moved to another port on the
switch and issued a RELEASE or DECLINE. The MAC
address is taken from the chaddr field of the DHCP packet,
not the source MAC address in the Ethernet header.
Insertion of opt82 fail Number of times the option-82 insertion into a packet
failed. The insertion might fail if the packet with the
option-82 data exceeds the size of a single physical packet
on the internet.

Cisco Catalyst 3750-X Specifications

General

Switching Capacity	160 Gbps
Stacking Bandwidth	64 Gbps
Max Stacking Units	9
Layer Support	Layer 2 and Layer 3
Form Factor	Rack-mountable
DRAM	256 MB
Flash Memory	64 MB
Model	Cisco Catalyst 3750-X Series
Ports	24 or 48 10/100/1000 Ethernet ports
Uplink Interfaces	4 SFP or 2 SFP+
Features	StackWise Plus, EnergyWise
Image	IP Base or IP Services
Operating Temperature	0 to 40°C
Operating Humidity	10 to 85% noncondensing