Cisco Cisco 2600 3600 3700 Series 36-Port 10 100 EtherSwitch Modules Troubleshooting Guide
2-10
Cisco Gigabit Ethernet Switch Module for the HP p-Class BladeSystem System Message Guide
380260-002
Chapter 2 Message 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]. [chars]
configuration may not take effect on secondary vlan [dec]. [chars]
Explanation
This message means that if private VLANs are configured, the DHCP Snooping
configuration on the primary VLAN automatically propagates to all the secondary VLANs. [dec] is
the VLAN IDs of the secondary VLANs, and [chars] is the warning.
the VLAN IDs of the secondary VLANs, and [chars] is the warning.
Recommended Action
No action is required.
Error Message DHCP_SNOOPING-4-IP_SOURCE_BINDING_NON_EXISTING_VLAN_WARNING: IP
source binding is configured on non existing vlan [dec].
source binding is configured on non existing vlan [dec].
Explanation
The message means that an IP source binding was configured on a VLAN that has not
been configured yet. [dec] is the VLAN.
Recommended Action
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.
not take effect on secondary vlan [dec] where IP source binding is configured.
[chars].
Explanation
This message means that if private VLANs are configured, the IP-source-guard filter on the
primary VLAN automatically propagates to all secondary VLANs. [dec] is the secondary VLAN, and
[chars] is the warning.
[chars] is the warning.
Recommended Action
No action is required.
Error Message DHCP_SNOOPING-4-NTP_NOT_RUNNING: NTP is not running; reloaded binding
lease expiration times are incorrect.
lease expiration times are incorrect.
Explanation
This message means that if the DHCP snooping database agent loads the DHCP
snooping bindings and NTP is not running, the calculated lease duration for the bindings is
incorrect.
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 DHCP snooping binding
database.
database.
Error Message DHCP_SNOOPING-4-QUEUE_FULL: Fail to enqueue DHCP packet into
processing queue: [chars], the queue is most likely full and the packet will be
processing queue: [chars], the queue is most likely full and the packet will be
dropped.
Explanation
This message means that the CPU is receiving DHCP packets a higher rate than the
DHCP snooping process can handle. These DHCP packets are dropped to prevent a denial of service
attack. [chars] is the warning.
attack. [chars] is the warning.
Recommended Action
No action is required.