crashed.
EVENT CODE: 2
Definition: The entity is about to go into test mode.
EVENT CODE: 3
Definition: The entity is about to reset.
EVENT CODE: 4
Definition: The entity is about to reboot.
EVENT CODE: 5
Definition: The entity is about to halt.
EVENT CODE: 6
Definition: The system is close to depleting its packet buffer
space.
Event Status: optional
EVENT CODE: 7
Definition: The system has depleted its packet buffer space.
EVENT CODE: 8
Definition: The system has depleted a non-packet buffer space.
Note: The two trap codes above do not deal neatly with
systems which have multiple buffer pools, each of which
may be depleted separately, with very different effects
on the entity.
The next set of event codes apply to events related to network
interfaces.
EVENT CODE: 1024
Definition: The given interface has just come up.
Related Objects: The InterfaceData structure for the
interface.
EVENT CODE: 1025
Definition: The given interface has just been taken down.
Related Objects: The InterfaceData structure for the
interface.
EVENT CODE: 1026
Definition: The given interface has just gone into test mode.
Related Objects: The InterfaceData structure for the
interface.
The next set of event codes are used to report IP-level errors.
EVENT CODE: 2048
Definition: Unable to route IP packet.
EVENT CODE: 2049
Definition: Bad IP checksum.
EVENT CODE: 2050
Definition: An IP packet with a bad header was received (for
example, with a broadcast or multicast IP address as the
source, or the wrong IP version number, or a header length
which is too short).
Related Objects: Should return the IP header of the packet.
Note that an IP header type has not yet been defined.
EVENT CODE: 2051
Definition: Packet for unsupported IP transport protocol.
Related Objects: Should return the IP header of the packet.
Note that an IP header type has not yet been defined.
EVENT CODE: 2052
Definition: A stunted IP packet was received (smaller than
the IP length says it should be).
Related Objects: Should return the IP header of the packet.
Note that an IP header type has not yet been defined.
EVENT CODE: 2053
Definition: An oversize IP packet was received (larger than
the IP length says it should be).
Related Objects: Should return the IP header of the packet.
Note that an IP header type has not yet been defined.
EVENT CODE: 2054
Definition: A good IP packet was discarded (usually to free
up buffer space).
Related Objects: Should return the IP header of the packet.
Note that an IP header type has not yet been defined.
EVENT CODE: 2055
Definition: An IP packet's time-to-live as expired.
Related Objects: Should return the IP header of the packet.
Note that an IP header type has not yet been defined.
EVENT CODE: 2056
Definition: This IP fragment has timed out.
Related Objects: Should return the header of the fragment.
Note that an IP header type has not yet been defined.
AREAS FOR FURTHER STUDY
There are several parts of this document that could use additional
study. Comments from readers are welcome.
The whole event system needs thorough examination. It is not clear
that the event control mechanism strikes the proper balance between
sufficient flexibility to allow monitoring centers to customize
their event stream, and keeping the basic mechanism simple.
Further, the problem of defining generic events for all entities is
an immense task. Finally, the system of appending required values
after traps, followed by optional values read from the data tree
feels a bit cumbersome. It would be nice if all values were in the
same data space.
Several readers have suggested it might make more sense to keep TCP
connection parameters on a per-connection basis rather than
globally.
The method for specifying the TCP round-trip time algorithm needs
to be refined. The expression syntax should be sufficiently
general that all round-trip-time-related algorithms (e.g., those
for time or routing protocols) can be expressed in it.
Much more research could be done into what information needs to be
gathered to effectively monitor a network.