WJH Events Reference

This reference lists all the NetQ-supported What Just Happened (WJH) metrics and provides a brief description of each. The full outputs vary slightly based on the type of drop and whether you are viewing the results in the NetQ UI or through one of the NetQ CLI commands.

For instructions on how to configure and monitor What Just Happened events, refer to Configure and Monitor What Just Happened.

Layer 1 Drops

Describes why a port is in the down state.

Reason	Description
Auto-negotiation failure	Negotiation of port speed with peer has failed
Logical mismatch with peer link	Logical mismatch with peer link
Link training failure	Link is not able to go operational up due to link training failure
Peer is sending remote faults	Peer node is not operating correctly
Bad signal integrity	Integrity of the signal on port is not sufficient for good communication
Cable/transceiver is not supported	The attached cable or transceiver is not supported by this port
Cable/transceiver is unplugged	A cable or transceiver is missing or not fully inserted into the port
Calibration failure	Calibration failure
Port state changes counter	Cumulative number of state changes
Symbol error counter	Cumulative number of symbol errors
CRC error counter	Cumulative number of CRC errors

In addition to the reason, the information provided for these drops includes:

Parameter	Description
Corrective Action	Provides recommend actions to take to resolve the port down state
First Timestamp	Date and time this port was marked as down for the first time
Ingress Port	Port accepting incoming traffic
CRC Error Count	Number of CRC errors generated by this port
Symbol Error Count	Number of Symbol errors generated by this port
State Change Count	Number of state changes that have occurred on this port
OPID	Operation identifier; used for internal purposes
Is Port Up	Indicates whether the port is in an Up (true) or Down (false) state

Layer 2 Drops

Describes why a link is down.

Reason	Severity	Description
MLAG port isolation	Notice	Not supported for port isolation implemented with system ACL
Destination MAC is reserved (DMAC=01-80-C2-00-00-0x)	Error	The address cannot be used by this link
VLAN tagging mismatch	Error	VLAN tags on the source and destination do not match
Ingress VLAN filtering	Error	Frames whose port is not a member of the VLAN are discarded
Ingress spanning tree filter	Notice	Port is in Spanning Tree blocking state
Unicast MAC table action discard	Notice	Packet dropped due to a MAC table configuration rule
Multicast egress port list is empty	Warning	No ports are defined for multicast egress
Port loopback filter	Error	Port is operating in loopback mode; packets are being sent to itself (source MAC address is the same as the destination MAC address)
Source MAC is multicast	Error	Packets have multicast source MAC address
Source MAC equals destination MAC	Error	Source MAC address is the same as the destination MAC address

In addition to the reason, the information provided for these drops includes:

Parameter	Description
Source Port	Port ID where the link originates
Source IP	Port IP address where the link originates
Source MAC	Port MAC address where the link originates
Destination Port	Port ID where the link terminates
Destination IP	Port IP address where the link terminates
Destination MAC	Port MAC address where the link terminates
First Timestamp	Date and time this link was marked as down for the first time
Aggregate Count	Total number of dropped packets
Protocol	ID of the communication protocol running on this link
Ingress Port	Port accepting incoming traffic
OPID	Operation identifier; used for internal purposes

Router Drops

Describes why the server is unable to route a packet.

Reason	Severity	Description
Non-routable packet	Notice	Packet has no route in routing table
Blackhole route	Warning	Packet received with action equal to discard
Unresolved next hop	Warning	The next hop in the route is unknown
Blackhole ARP/neighbor	Warning	Packet received with blackhole adjacency
IPv6 destination in multicast scope FFx0:/16	Notice	Packet received with multicast destination address in FFx0:/16 address range
IPv6 destination in multicast scope FFx1:/16	Notice	Packet received with multicast destination address in FFx1:/16 address range
Non-IP packet	Notice	Cannot read packet header because it is not an IP packet
Unicast destination IP but non-unicast destination MAC	Error	Cannot read packet with IP unicast address when destination MAC address is not unicast (FF:FF:FF:FF:FF:FF)
Destination IP is loopback address	Error	Cannot read packet as destination IP address is a loopback address (dip=>127.0.0.0/8)
Source IP is multicast	Error	Cannot read packet as source IP address is a multicast address (ipv4 SIP => 224.0.0.0/4)
Source IP is in class E	Error	Cannot read packet as source IP address is a Class E address
Source IP is loopback address	Error	Cannot read packet as source IP address is a loopback address (ipv4 => 127.0.0.0/8 for ipv6 => ::1/128)
Source IP is unspecified	Error	Cannot read packet as source IP address is unspecified (ipv4 = 0.0.0.0/32; for ipv6 = ::0)
Checksum or IP ver or IPv4 IHL too short	Error	Cannot read packet due to header checksum error, IP version mismatch, or IPv4 header length is too short
Multicast MAC mismatch	Error	For IPv4, destination MAC address is not equal to {0x01-00-5E-0 (25 bits), DIP[22:0]} and DIP is multicast. For IPv6, destination MAC address is not equal to {0x3333, DIP[31:0]} and DIP is multicast
Source IP equals destination IP	Error	Packet has a source IP address equal to the destination IP address
IPv4 source IP is limited broadcast	Error	Packet has broadcast source IP address
IPv4 destination IP is local network (destination = 0.0.0.0/8)	Error	Packet has IPv4 destination address that is a local network (destination=0.0.0.0/8)
IPv4 destination IP is link-local (destination in 169.254.0.0/16)	Error	Packet has IPv4 destination address that is a local link
Ingress router interface is disabled	Warning	Packet destined to a different subnet cannot be routed because ingress router interface is disabled
Egress router interface is disabled	Warning	Packet destined to a different subnet cannot be routed because egress router interface is disabled
IPv4 routing table (LPM) unicast miss	Warning	No route available in routing table for packet
IPv6 routing table (LPM) unicast miss	Warning	No route available in routing table for packet
Router interface loopback	Warning	Packet has destination IP address that is local. For example, SIP = 1.1.1.1, DIP = 1.1.1.128.
Packet size is larger than MTU	Warning	Packet has larger MTU configured than the VLAN
TTL value is too small	Warning	Packet has TTL value of 1

Tunnel Drops

Describes why a tunnel is down.

Reason	Severity	Description
Overlay switch - source MAC is multicast	Error	Overlay packet’s source MAC address is multicast
Overlay switch - source MAC equals destination MAC	Error	Overlay packet’s source MAC address is the same as the destination MAC address
Decapsulation error	Error	De-capsulation produced incorrect format of packet. For example, encapsulation of packet with many VLANs or IP options on the underlay can cause de-capsulation to result in a short packet.
Tunnel interface is disabled	Error	Packet cannot de-capsulate because the tunnel interface is disabled

Buffer Drops

Describes why the server buffer has dropped packets.

Reason	Severity	Description
Tail drop	Warning	Tail drop is enabled, and buffer queue is filled to maximum capacity
WRED	Warning	Weighted Random Early Detection is enabled, and buffer queue is filled to maximum capacity or the RED engine dropped the packet as of random congestion prevention
Port TC Congestion Threshold Crossed	Warning	Percentage of the occupancy buffer exceeded or dropped below the specified high or low threshold
Packet Latency Threshold Crossed	Warning	Time a packet spent within the switch exceeded or dropped below the specified high or low threshold

ACL Drops

Describes why an ACL has dropped packets.

Reason	Severity	Description
Ingress port ACL	Notice	ACL action set to deny on the physical ingress port or bond
Ingress router ACL	Notice	ACL action set to deny on the ingress switch virtual interfaces (SVIs)
Egress port ACL	Notice	ACL action set to deny on the physical egress port or bond
Egress router ACL	Notice	ACL action set to deny on the egress SVIs