Appendix – What Just Happened® Reasons

Category

Name

Description

Severity

Ethernet

Ingress Packet Reserved DMAC

Destination MAC is Reserved (DMAC=01-80-C2-00-00-0x)

Notice

Ethernet

Ingress Switch Vtag Allow

VLAN tagging mismatch

Notice

Ethernet

Ingress Switch VLAN

VLAN filtering

Notice

Ethernet

Ingress Switch STP

Ingress spanning tree filter

Notice

Ethernet

Lookup Switch UC

Unicast FDB discard

Notice

Ethernet

Lookup Switch MC Null

Multicast list is empty

Notice

Ethernet

Lookup Switch LB

Port loopback filter

Notice

Ethernet

Ingress Packet SMAC is MC

Source MAC is multicast

Notice

Ethernet

Ingress Packet SMAC Equals DMAC

Source MAC equals destination MAC

Notice

IP

Ingress Router No HDR

Non IP packet

Notice

IP

Ingress Router UC DIP MC DMAC

Unicast destination IP but non-unicast destination MAC

Notice

IP

Ingress Router DIP LB

Destination IP is loopback address

Notice

IP

Ingress Router SIP MC

Source IP is multicast

Notice

IP

Ingress Router SIP Class E

Source IP is in class E

Notice

IP

Ingress Router SIP LB

Source IP is loopback

Notice

IP

Ingress Router SIP Unspecified

Source IP is not specified

Notice

IP

Ingress Router IP HDR

Checksum or IPver or IPv4 IHL too short

Notice

IP

Ingress Router MC DMAC

Multicast MAC mismatch

Notice

IP

Ingress Router SIP Equals DIP

Source IP equals to destination IP

Notice

IP

Ingress Router SIP BC

IPv4 source IP is limited broadcast

Notice

IP

Ingress Router DIP Local Network

IPv4 destination IP is local network

Notice

IP

Ingress Router DIP Link Local

IPv4 destination IP is link local

Notice

IP

Router IRIF Disabled

Ingress IP interface is disabled

Notice

IP

Router ERIF Disabled

Egress IP interface is disabled

Notice

IP

Router LPM4

IPv4 LPM unicast miss

Notice

IP

Router LPM6

IPv6 LPM unicast miss

Notice

IP

MC Scope IPv6 0

IPv6 destination in multicast scope FFx0:/16

Notice

IP

MC Scope IPv6 1

IPv6 destination in multicast scope FFx1:/16

Notice

Tunnel

Decapsulation Packet

Remained packet is too short

Notice

Tunnel

Decapsulation Error

Decapsulation error

Notice

Tunnel

Overlay Switch SMAC Multicast

Overlay: source MAC is multicast

Notice

Tunnel

Overlay Switch SMAC Equals DMAC

Overlay: source MAC equals destination MAC

Notice

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