ALM-3245219843 Ethernet ARP IP Conflict Event
Description
ARP/4/ARP_IPCONFLICT_TRAP:OID [OID] ARP detects IP conflict. (IP address=[IPADDR], Local interface=[OCTET], Local MAC=[OCTET], Local vlan=[INTEGER], Local CE vlan=[INTEGER], Receive interface=[OCTET], Receive MAC=[OCTET], Receive vlan=[INTEGER], Receive CE vlan=[INTEGER], IP conflict type=[OCTET]).
An IP address conflict is detected by ARP.
Attribute
Alarm ID |
OID |
Alarm Severity |
Alarm Type |
---|---|---|---|
3245219843 |
1.3.6.1.4.1.2011.5.25.123.2.6 |
Major |
environmentalAlarm |
Parameters
Name |
Meaning |
---|---|
OID |
Indicates the MIB object ID of the alarm. |
IP address |
IP address. |
Local interface |
Interface recorded in the ARP entry of the IP address. |
Local MAC |
Source MAC address recorded in the ARP entry of the IP address. |
Local vlan |
VLAN recorded in the ARP entry of the IP address. |
Local CE vlan |
CEVLAN recorded in the ARP entry of the IP address. |
Receive interface |
Inbound interface of the second ARP packet with the IP address. |
Receive MAC |
Source MAC address of the second ARP packet with the IP address. |
Receive vlan |
VLAN configured on the inbound interface of the second ARP packet with the IP address. |
Receive CE vlan |
CEVLAN configured on the inbound interface of the second ARP packet with the IP address. |
IP conflict type |
IP address conflict type. |
Impact on the System
This alarm indicates that an IP address conflict occurred. If the IP address conflict is not eliminated timely, route flapping may occur and services may be interrupted.
Possible Causes
- Cause 1: The source IP address in an ARP packet is the same as the IP address of the inbound interface that receives the ARP packet, but the source MAC address in the ARP packet is different than the MAC address of the inbound interface.
- Cause 2: The source IP address in an ARP packet is the same as the IP address in an existing ARP entry, but the source MAC address is different than the MAC address in the ARP entry.
- Cause 3: The source IP address in an ARP packet is 0.0.0.0 (probe ARP packet), the destination IP address is the same as the IP address of the inbound interface that receives the ARP packet, but the source MAC address in the ARP packet is different than the MAC address of the inbound interface.
Procedure
- Identify the devices or users who use the same IP address.
- If the devices or users using the same IP address can be identified, modify the IP address of one device or user. Then, go to step 2.
- If the devices or users using the same IP address cannot be identified. Collect alarm information and configuration information, and then contact technical support personnel.
- End.
Clearing
The alarm needs to be cleared manually.
Feedback
Was this page helpful?
Provide feedbackThank you very much for your feedback. We will continue working to improve the documentation.See the reply and handling status in My Cloud VOC.
For any further questions, feel free to contact us through the chatbot.
Chatbot