The CISCO-NETREG-DHCPV6-MIB contains the counters and
notification structures which carry the identity and status
information of the managed object as analyzed by an event
processor. The DHCPv6 counters can be queried using the mib
objects. The design of this MIB is limited to platforms that
can not fully support structures normally supported by device
as follows.
-- Platform can not support object within tables and are
limited to scalar objects.
-- Platform can not support setting or retrieval of
configuration data. Therefore, data in notification must
be provided by objects defined with MAX-ACCESS of
accessible-for-notify.
Descriptions of acronyms and definitions:
address An IP layer identifier for an
interface or a set of interfaces.
host Any node that is not a router.
IP Internet Protocol Version 6 (IPv6).
The terms IPv4 and IPv6 are used
only in contexts where it is
necessary to avoid ambiguity.
interface A node's attachment to a link.
link A communication facility or medium
over which nodes can communicate at
the link layer, i.e., the layer
immediately below IP. Examples are
Ethernet (simple or bridged); Token
Ring; PPP links, X.25, Frame Relay,
or ATM networks; and Internet (or
higher) layer tunnels, such as
tunnels over IPv4 or IPv6 itself.
link-layer identifier A link-layer identifier for an
interface. Examples include IEEE 802
addresses for Ethernet or Token Ring
network interfaces, and E.164
addresses for ISDN links.
node A device that implements IP.
packet An IP header plus payload.
prefix The initial bits of an address, or a
set of IP addresses that share the
same initial bits.
prefix length The number of bits in a prefix.
router A node that forwards IP packets not
explicitly addressed to itself.
DHCP relay agent A node that acts as an
intermediary to deliver DHCP messages
between clients and servers, and is
on the same link as the client.
DHCP server (or server) A node that responds to requests from
clients, and may or may not be on the
same link as the client(s).
DUID A DHCP Unique IDentifier for a DHCP
participant; each DHCP client and
server has exactly one DUID.
Scope A DHCP Scope object. A scope defines
a set of dynamic address pools on a
subnet that share its configuration
attributes. A scope can also contain
reserved addresses on the specified
subnet that should use the
configuration.
client-class A client-class defines the selection
criteria and configuration for a
group of clients.
selection-tag A selection-tag refers to a named
entity that is used to control
matching client and client-class
entries with candidate scopes.
grouping A grouping defines the aggregation of
the free address levels of scopes.
ication signifies that the number
of available IPv6 addresses for a particular prefix or link
has fallen below the value of cnrdhcpv6Threshold.
This notification signals a shortage of addresses.
The shortage will continue until the number of free
addresses has reached or exceeded the threshold specified by
cnrdhcpv6Threshold. This notification will only be generated
when the shortages of IPv6 addresses is first encountered.
When ciscoNetRegDhcpv6AddressShortageStop is generated, it
enables this notification to trigger again the next time
the number of free addresses for that prefix or link falls
below the value indicated by cnrdhcpv6Threshold.
At the time this event is triggered, cnrdhcpv6LinkName
indicates the name of the link or prefix,
cnrdhcpv6FreeAddressValue provides the count of the addresses,
cnrdhcpv6Threshold indicates the configured percentage that
was crossed. In case cnrdhcpv6ThresholdType is of type 'prefix'
then cnrdhcpv6PrefixAddress and cnrdhcpv6PrefixLength indicate
the address and length of the prefix and cnrdhcpv6TypeDesc
indicates extra grouping information on the prefix or link that
triggered this event.
ciscoNetRegDhcpv6AddressShortageStop
.1.3.6.1.4.1.9.10.139.0.2
ication signifies that the shortage of
available IPv6 addresses for a particular prefix or link is
over and is generated when the number of free addresses for
that prefix or link reaches or exceed value specified by
cnrdhcpv6Threshold.
This notification will only be generated when exceeding the
threshold specified by cnrdhcpv6Threshold for the first time.
When ciscoNetRegDhcpv6AddressShortageStart is generated, it
enables this notification to trigger again the next time the
number of free addresses for that prefix or link reaches or
exceed value specified by cnrdhcpv6Threshold.
At the time this event is triggered, cnrdhcpv6LinkName
indicates the name of the link or prefix,
cnrdhcpv6FreeAddressValue provides the count of the addresses,
cnrdhcpv6Threshold specifies the configured percentage that
was crossed. In case cnrdhcpv6ThresholdType is of type 'prefix'
then cnrdhcpv6PrefixAddress and cnrdhcpv6PrefixLength indicate
the address and length of the prefix and cnrdhcpv6TypeDesc
indicates extra grouping information on the prefix or link that
triggered this event.
ciscoNetRegDhcpv6DuplicateAddress
.1.3.6.1.4.1.9.10.139.0.3
ication is triggered when a duplicate IPv6
address assignment is detected. This notification is
generated if a client sends a Decline message. The DHCPv6
client is required to do Duplicate Address Detection (DAD)
before using the address and therefore would send the
Decline message if it found that the address was in use.
The DHCP server marks the IP address as unavailable for
leasing to clients. cnrdhcpv6DupIpv6Address indicates the
IPv6 address that triggered this event, cnrdhcpv6ClientId
and cnrdhcpv6ClientLookupKey indicate the client identifier
option and lookup key for the client that triggered this
event and cnrdhcpv6DupIpv6AddressDetectedBy object
indicates whether the client or server detected this
condition.
ciscoNetRegDhcpv6DuplicatePrefix
.1.3.6.1.4.1.9.10.139.0.4
ication is triggered when a duplicate IPv6 prefix
assignment is detected. This notification is generated if a
client sends a Decline message. The DHCPv6 client is required
to do Duplicate Address Detection (DAD) before using the
prefix and therefore would send the Decline message if it
found that the address was in use.
The DHCP server marks the prefix as unavailable for leasing
to clients. cnrdhcpv6DupPrefix and cnrdhcpv6DupPrefixLength
indicate the duplicate prefix and length that triggered this
event, cnrdhcpv6ClientId and cnrdhcpv6ClientLookupKey indicate
the client identifier option and lookup key for the client
that triggered this event and cnrdhcpv6DupIpv6AddressDetectedBy
object indicates whether the client or server detected this
condition.
ciscoNetRegDhcpv6AddressConflict
.1.3.6.1.4.1.9.10.139.0.5
ication indicates that the DHCP server on this host,
and a DHCP server on another host, have claimed ownership for
the same IPv6 address. The cnrdhcpv6ContestedIpv6Address object
indicates which address is under contention. The
cnrdhcpv6PartnerServerAddr or cnrdhcpv6PartnerServerIpv6Addr
object indicates with which other server a conflict was
detected. The cnrdhcpv6FailoverPairName object indicates
failover pair name.
ciscoNetRegDhcpv6PrefixConflict
.1.3.6.1.4.1.9.10.139.0.6
ication indicates that the DHCP server on this host,
and a DHCP server on another host, have claimed ownership for
the same IPv6 prefix. The cnrdhcpv6ContestedIpv6Prefix object
indicates which prefix is under contention.
cnrdhcpv6ContestedIpv6PrefixLength indicates the length of the
prefix. The cnrdhcpv6PartnerServerAddr or
cnrdhcpv6PartnerServerIpv6Addr object indicates with which other
server a conflict was detected. The cnrdhcpv6FailoverPairName
object indicates failover pair name.
ciscoNetRegDhcpv6MIB 
cnrdhcpv6LinkName 
ciscoNetRegDhcpv6AddressShortageStart