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Monitor and troubleshoot
Documents in this section describe tools that can help you monitor, diagnose, and troubleshoot SR Linux software. This section also includes Log Event documentation to help you interpret log messages generated by SR Linux software.
Log Events Guide
This document provides guidance for operators to interpret log events for the Nokia Service Router Linux (SR Linux).
arpnd

Monitor and troubleshoot
Documents in this section describe tools that can help you monitor, diagnose, and troubleshoot SR Linux software. This section also includes Log Event documentation to help you interpret log messages generated by SR Linux software.
- Troubleshooting Toolkit
  This document describes how to use and configure diagnostic tools for the Nokia Service Router Linux (SR Linux).
- Event Handler Guide
  This document describes the functionality and configuration for the event handler framework on the Nokia Service Router Linux (SR Linux).
- Log Events Guide
  This document provides guidance for operators to interpret log events for the Nokia Service Router Linux (SR Linux).

arpnd

ipArpEntryUpdated

Table 1. ipArpEntryUpdated properties
Property name	Value
Application name	arpnd
Event name	ipArpEntryUpdated
Default severity	informational
Message format string	The ARP entry for ipv4-address on interface.subinterface-index has been updated from mac old-mac type old-type to mac new-mac and type new-type.
Cause	This event is generated whenever an existing static or dynamic ARP entry for an IPv4 address is overwritten. This could be a triggered by a change of entry type (static vs dynamic) or a change of MAC address or a change of the subinterface binding.
Effect	None

ipSubinterfaceDuplicateIpv4Address

Table 2. ipSubinterfaceDuplicateIpv4Address properties
Property name	Value
Application name	arpnd
Event name	ipSubinterfaceDuplicateIpv4Address
Default severity	notice
Message format string	The IPv4 address ipv4-address assigned to interface.subinterface-index is being used by another host or router on the same subnet.
Cause	This event is generated when ARP detects that another system is using the same IPv4 address
Effect	Unreliable communications

ipSubinterfaceDuplicateIpv6Address

Table 3. ipSubinterfaceDuplicateIpv6Address properties
Property name	Value
Application name	arpnd
Event name	ipSubinterfaceDuplicateIpv6Address
Default severity	notice
Message format string	The IPv6 address ipv6-address assigned to interface.subinterface-index is being used by another host or router on the same subnet.
Cause	This event is generated when IPv6 DAD detects that another system is using the same IPv6 address
Effect	Unreliable communications

ipSubinterfaceDuplicateMacAddress

Table 4. ipSubinterfaceDuplicateMacAddress properties
Property name	Value
Application name	arpnd
Event name	ipSubinterfaceDuplicateMacAddress
Default severity	notice
Message format string	The MAC address mac-address used by interface.subinterface-index is being used by another host or router on the same subnet.
Cause	This event is generated when ARP or IPv6 Neighbor Discovery detects that another system is using the same MAC address
Effect	Unreliable communications

ipSubinterfaceInvalidArp

Table 5. ipSubinterfaceInvalidArp properties
Property name	Value
Application name	arpnd
Event name	ipSubinterfaceInvalidArp
Default severity	notice
Message format string	An ARP request for ipv4-address was received on interface.subinterface-index and there is no matching IPv4 subnet.
Cause	This event is generated when ARP receives an ARP request for an invalid IPv4 address
Effect	None

ipSubinterfaceInvalidIpv6NeighborSolicitation

Table 6. ipSubinterfaceInvalidIpv6NeighborSolicitation properties
Property name	Value
Application name	arpnd
Event name	ipSubinterfaceInvalidIpv6NeighborSolicitation
Default severity	notice
Message format string	An IPv6 neighbor solicitation for ipv6-address was received on interface.subinterface-index and there is no matching IPv6 subnet.
Cause	This event is generated when IPv6 neighbor discovery receives a NS message for an invalid IPv6 address
Effect	None

ipv6NeighborEntryUpdated

Table 7. ipv6NeighborEntryUpdated properties
Property name	Value
Application name	arpnd
Event name	ipv6NeighborEntryUpdated
Default severity	informational
Message format string	The IPv6 neighbor discovery entry for ipv6-address on interface.subinterface-index has been updated from mac old-mac type old-type to mac new-mac and type new-type.
Cause	This event is generated whenever an existing static or dynamic neighbor entry for an IPv6 address is overwritten. This could be a triggered by a change of entry type (static vs dynamic) or a change of MAC address or a change of the subinterface binding.
Effect	None