This type is not a standard SMI/SNMP base type and is not defined as a documented TEXTUAL-CONVENTION in this MIB.
It was extracted as raw syntax from the source MIB file and could not be resolved to a known type definition.
For devices that allows dynamic determination of whether
a link between two switches should be a trunk or not, this
object allows the operator to mandate the behavior of that
dynamic mechanism.
on(1) dictates that the interface will always be a
trunk. This is the value for static entries (those that
show no dynamic behavior). If the negotiation is supported
on this port, negotiation will take place with the far end
to attempt to bring the far end into trunking state.
off(2) allows an operator to specify that the specified
interface is never to be trunk, regardless of any dynamic
mechanisms to the contrary. This value is useful for
overriding the default behavior of some switches. If the
negotiation is supported on this port, negotiation will take
place with the far end to attempt on the link to bring the
far end into non-trunking state.
desirable(3) is used to indicate that it is desirable for
the interface to become a trunk. The device will initiate
any negotiation necessary to become a trunk but will not
become a trunk unless it receives confirmation from the far
end on the link.
auto(4) is used to indicate that the interface is capable
and willing to become a trunk but will not initiate
trunking negotiations. The far end on the link are
required to either start negotiations or start sending
encapsulated packets, on which event the specified
interface will become a trunk.
onNoNegotiate(5) is used to indicate that the interface is
permanently set to be a trunk, and no negotiation takes
place with the far end on the link to ensure consistent
operation. This is similar to on(1) except no negotiation
takes place with the far end.
If the port does not support negotiation or its
vlanTrunkPortEncapsulationType is set to negotiate(5),
onNoNegotiate(5) is not allowed.
Devices that do no support dynamic determination (for just
a particular interface, encapsulation or for the whole
device) need only support the 'on', and 'off' values.
This OID is also declared by other modules:
CISCO-VTP-MIB