Cisco Catalyst 4500 Series Message Guide

2-17
Catalyst 4500 Series Switch Cisco IOS System Message Guide Release 12.2(31)SGA
OL-11541-01
Chapter 2 Messages and Recovery Procedures
DHCP_SNOOPING Messages
Error Message DHCP_SNOOPING-4-DHCP_SNOOPING_PVLAN_WARNING: DHCP Snooping
configuration may not take effect on secondary vlan [dec]. [char]
Explanation
DHCP snooping configuration on the primary VLAN automatically propagates to all
secondary VLANs if private VLANs are enabled.
Recommended Action This is an informational message only. No action is required.
Error Message DHCP_SNOOPING-4-IP_SOURCE_BINDING_PVLAN_WARNING: IP source filter may
not take effect on secondary vlan [dec] where IP source binding is configured.
[char]
Explanation
The IP source filter on the primary VLAN automatically propagates to all secondary
VLANs if private VLANs are enabled.
Recommended Action Reconfigure the IP source binding to a known functioning VLAN.
Error Message DHCP_SNOOPING-4-IP_SOURCE_BINDING_NON_EXISTING_VLAN_WARNING: IP
source binding is configured on non existing vlan [dec].
Explanation IP source binding was configured on a VLAN that has not yet been configured.
Recommended Action This is an informational message only. No action is required. It may persist
unless you define the VLAN in question and then reapply the IP source binding. If you see this
message regarding a VLAN that is correctly configured, contact your technical support
representative.
Error Message DHCP_SNOOPING-4-NTP_NOT_RUNNING: NTP is not running; reloaded binding
lease expiration times are incorrect.
Explanation
If the DHCP snooping bindings are loaded by the DHCP snooping database agent and
NTP is not running, then the calculated lease duration for the bindings will be incorrect.
Recommended Action Configure NTP on the switch to provide an accurate time and date for the
system clock. Then disable and re-enable DHCP snooping to clear the bindings database.
Error Message DHCP_SNOOPING-4-QUEUE_FULL: Fail to enqueue DHCP packet into
processing queue: [char]
Explanation
DHCP packets are coming into the CPU at a much higher rate than the DHCP snooping
process can handle them. These unhandled DHCP packets will be dropped to prevent a denial of
service attack.
Recommended Action This is an informational message only. No action is required.

Cisco Catalyst 4500 Series Specifications

General

Series	Catalyst 4500 Series
Category	Switch
Layer Support	Layer 2, Layer 3
Form Factor	Modular chassis
Stackable	No
Chassis Slots	3, 6, 7, 10
Power Supply Options	AC, DC
Redundancy	Power supply, Supervisor engine
Network Management	Cisco IOS Software CLI, SNMP, Cisco Prime Infrastructure
Features	Security, QoS
Port Density	Up to 384 ports per chassis
Security Features	802.1X, ACLs, DHCP Snooping, Dynamic ARP Inspection, IP Source Guard
Supervisor Engine	8-E