RFC 1850
OSPF Version 2 Management Information Base
ospfVirtIfRetransInterval OBJECT-TYPE
SYNTAX UpToMaxAge
MAX-ACCESS read-create
STATUS current
DESCRIPTION
"The number of seconds between link-state ad-
vertisement retransmissions, for adjacencies
belonging to this interface. This value is
also used when retransmitting database descrip-
tion and link-state request packets. This
value should be well over the expected round-
trip time."
DEFVAL { 5 }
::= { ospfVirtIfEntry 4 }
ospfVirtIfHelloInterval OBJECT-TYPE
SYNTAX HelloRange
MAX-ACCESS read-create
STATUS current
DESCRIPTION
"The length of time, in seconds, between the
Hello packets that the router sends on the in-
terface. This value must be the same for the
virtual neighbor."
DEFVAL { 10 }
::= { ospfVirtIfEntry 5 }
ospfVirtIfRtrDeadInterval OBJECT-TYPE
SYNTAX PositiveInteger
MAX-ACCESS read-create
STATUS current
DESCRIPTION
"The number of seconds that a router's Hello
packets have not been seen before it's neigh-
bors declare the router down. This should be
some multiple of the Hello interval. This
value must be the same for the virtual neigh-
bor."
DEFVAL { 60 }
::= { ospfVirtIfEntry 6 }
ospfVirtIfState OBJECT-TYPE
SYNTAX INTEGER {
down (1), -- these use the same encoding
pointToPoint (4) -- as the ospfIfTable
}
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"OSPF virtual interface states."
DEFVAL { down }
::= { ospfVirtIfEntry 7 }
ospfVirtIfEvents OBJECT-TYPE
SYNTAX Counter32
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The number of state changes or error events on
this Virtual Link"
::= { ospfVirtIfEntry 8 }
ospfVirtIfAuthKey OBJECT-TYPE
SYNTAX OCTET STRING (SIZE(0..256))
MAX-ACCESS read-create
STATUS current
DESCRIPTION
"If Authentication Type is simplePassword, the
device will left adjust and zero fill to 8 oc-
tets.
Note that unauthenticated interfaces need no
authentication key, and simple password authen-
tication cannot use a key of more than 8 oc-
tets. Larger keys are useful only with authen-
tication mechanisms not specified in this docu-
ment.
When read, ospfVifAuthKey always returns a
string of length zero."
REFERENCE
"OSPF Version 2, Section 9 The Interface Data
Structure"
DEFVAL { '0000000000000000'H } -- 0.0.0.0.0.0.0.0
::= { ospfVirtIfEntry 9 }
ospfVirtIfStatus OBJECT-TYPE
SYNTAX RowStatus
MAX-ACCESS read-create
STATUS current
DESCRIPTION
"This variable displays the status of the en-
try. Setting it to 'invalid' has the effect of
rendering it inoperative. The internal effect
(row removal) is implementation dependent."
::= { ospfVirtIfEntry 10 }
ospfVirtIfAuthType OBJECT-TYPE
SYNTAX INTEGER (0..255)
-- none (0),
-- simplePassword (1)
-- md5 (2)
-- reserved for specification by IANA (> 2)
MAX-ACCESS read-create
STATUS current
DESCRIPTION
"The authentication type specified for a virtu-
al interface. Additional authentication types
may be assigned locally."
REFERENCE
"OSPF Version 2, Appendix E Authentication"
DEFVAL { 0 } -- no authentication, by default
::= { ospfVirtIfEntry 11 }
-- OSPF Neighbor Table
-- The OSPF Neighbor Table describes all neighbors in
-- the locality of the subject router.
ospfNbrTable OBJECT-TYPE
SYNTAX SEQUENCE OF OspfNbrEntry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"A table of non-virtual neighbor information."
REFERENCE
"OSPF Version 2, Section 10 The Neighbor Data
Structure"
::= { ospf 10 }
ospfNbrEntry OBJECT-TYPE
SYNTAX OspfNbrEntry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"The information regarding a single neighbor."
REFERENCE
"OSPF Version 2, Section 10 The Neighbor Data
Structure"
INDEX { ospfNbrIpAddr, ospfNbrAddressLessIndex }
::= { ospfNbrTable 1 }
OspfNbrEntry ::=
SEQUENCE {
ospfNbrIpAddr
IpAddress,
ospfNbrAddressLessIndex
InterfaceIndex,
ospfNbrRtrId
RouterID,
ospfNbrOptions
Integer32,
ospfNbrPriority
DesignatedRouterPriority,
ospfNbrState
INTEGER,
ospfNbrEvents
Counter32,
ospfNbrLsRetransQLen
Gauge32,
ospfNbmaNbrStatus
RowStatus,
ospfNbmaNbrPermanence
INTEGER,
ospfNbrHelloSuppressed
TruthValue
}
ospfNbrIpAddr OBJECT-TYPE
SYNTAX IpAddress
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The IP address this neighbor is using in its
IP Source Address. Note that, on addressless
links, this will not be 0.0.0.0, but the ad-
dress of another of the neighbor's interfaces."
::= { ospfNbrEntry 1 }
ospfNbrAddressLessIndex OBJECT-TYPE
SYNTAX InterfaceIndex
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"On an interface having an IP Address, zero.
On addressless interfaces, the corresponding
value of ifIndex in the Internet Standard MIB.
On row creation, this can be derived from the
instance."
::= { ospfNbrEntry 2 }
ospfNbrRtrId OBJECT-TYPE
SYNTAX RouterID
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"A 32-bit integer (represented as a type IpAd-
dress) uniquely identifying the neighboring
router in the Autonomous System."
DEFVAL { '00000000'H } -- 0.0.0.0
::= { ospfNbrEntry 3 }
ospfNbrOptions OBJECT-TYPE
SYNTAX Integer32
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"A Bit Mask corresponding to the neighbor's op-
tions field.
Bit 0, if set, indicates that the system will
operate on Type of Service metrics other than
TOS 0. If zero, the neighbor will ignore all
metrics except the TOS 0 metric.
Bit 1, if set, indicates that the associated
area accepts and operates on external informa-
tion; if zero, it is a stub area.
Bit 2, if set, indicates that the system is ca-
pable of routing IP Multicast datagrams; i.e.,
that it implements the Multicast Extensions to
OSPF.
Bit 3, if set, indicates that the associated
area is an NSSA. These areas are capable of
carrying type 7 external advertisements, which
are translated into type 5 external advertise-
ments at NSSA borders."
REFERENCE
"OSPF Version 2, Section 12.1.2 Options"
DEFVAL { 0 }
::= { ospfNbrEntry 4 }
ospfNbrPriority OBJECT-TYPE
SYNTAX DesignatedRouterPriority
MAX-ACCESS read-create
STATUS current
DESCRIPTION
"The priority of this neighbor in the designat-
ed router election algorithm. The value 0 sig-
nifies that the neighbor is not eligible to be-
come the designated router on this particular
network."
DEFVAL { 1 }
::= { ospfNbrEntry 5 }
ospfNbrState OBJECT-TYPE
SYNTAX INTEGER {
down (1),
attempt (2),
init (3),
twoWay (4),
exchangeStart (5),
exchange (6),
loading (7),
full (8)
}
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The State of the relationship with this Neigh-
bor."
REFERENCE
"OSPF Version 2, Section 10.1 Neighbor States"
DEFVAL { down }
::= { ospfNbrEntry 6 }
ospfNbrEvents OBJECT-TYPE
SYNTAX Counter32
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The number of times this neighbor relationship
has changed state, or an error has occurred."
::= { ospfNbrEntry 7 }
ospfNbrLsRetransQLen OBJECT-TYPE
SYNTAX Gauge32
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The current length of the retransmission
queue."
::= { ospfNbrEntry 8 }
ospfNbmaNbrStatus OBJECT-TYPE
SYNTAX RowStatus
MAX-ACCESS read-create
STATUS current
DESCRIPTION
"This variable displays the status of the en-
try. Setting it to 'invalid' has the effect of
rendering it inoperative. The internal effect
(row removal) is implementation dependent."
::= { ospfNbrEntry 9 }
ospfNbmaNbrPermanence OBJECT-TYPE
SYNTAX INTEGER {
dynamic (1), -- learned through protocol
permanent (2) -- configured address
}
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"This variable displays the status of the en-
try. 'dynamic' and 'permanent' refer to how
the neighbor became known."
DEFVAL { permanent }
::= { ospfNbrEntry 10 }
ospfNbrHelloSuppressed OBJECT-TYPE
SYNTAX TruthValue
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"Indicates whether Hellos are being suppressed
to the neighbor"
::= { ospfNbrEntry 11 }
-- OSPF Virtual Neighbor Table
-- This table describes all virtual neighbors.
-- Since Virtual Links are configured in the
-- virtual interface table, this table is read-only.
ospfVirtNbrTable OBJECT-TYPE
SYNTAX SEQUENCE OF OspfVirtNbrEntry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"A table of virtual neighbor information."
REFERENCE
"OSPF Version 2, Section 15 Virtual Links"
::= { ospf 11 }
ospfVirtNbrEntry OBJECT-TYPE
SYNTAX OspfVirtNbrEntry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"Virtual neighbor information."
INDEX { ospfVirtNbrArea, ospfVirtNbrRtrId }
::= { ospfVirtNbrTable 1 }
OspfVirtNbrEntry ::=
SEQUENCE {
ospfVirtNbrArea
AreaID,
ospfVirtNbrRtrId
RouterID,
ospfVirtNbrIpAddr
IpAddress,
ospfVirtNbrOptions
Integer32,
ospfVirtNbrState
INTEGER,
ospfVirtNbrEvents
Counter32,
ospfVirtNbrLsRetransQLen
Gauge32,
ospfVirtNbrHelloSuppressed
TruthValue
}
ospfVirtNbrArea OBJECT-TYPE
SYNTAX AreaID
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The Transit Area Identifier."
::= { ospfVirtNbrEntry 1 }
ospfVirtNbrRtrId OBJECT-TYPE
SYNTAX RouterID
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"A 32-bit integer uniquely identifying the
neighboring router in the Autonomous System."
::= { ospfVirtNbrEntry 2 }
ospfVirtNbrIpAddr OBJECT-TYPE
SYNTAX IpAddress
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The IP address this Virtual Neighbor is us-
ing."
::= { ospfVirtNbrEntry 3 }
ospfVirtNbrOptions OBJECT-TYPE
SYNTAX Integer32
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"A Bit Mask corresponding to the neighbor's op-
tions field.
Bit 1, if set, indicates that the system will
operate on Type of Service metrics other than
TOS 0. If zero, the neighbor will ignore all
metrics except the TOS 0 metric.
Bit 2, if set, indicates that the system is
Network Multicast capable; ie, that it imple-
ments OSPF Multicast Routing."
::= { ospfVirtNbrEntry 4 }
ospfVirtNbrState OBJECT-TYPE
SYNTAX INTEGER {
down (1),
attempt (2),
init (3),
twoWay (4),
exchangeStart (5),
exchange (6),
loading (7),
full (8)
}
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The state of the Virtual Neighbor Relation-
ship."
::= { ospfVirtNbrEntry 5 }
ospfVirtNbrEvents OBJECT-TYPE
SYNTAX Counter32
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The number of times this virtual link has
changed its state, or an error has occurred."
::= { ospfVirtNbrEntry 6 }
ospfVirtNbrLsRetransQLen OBJECT-TYPE
SYNTAX Gauge32
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The current length of the retransmission
queue."
::= { ospfVirtNbrEntry 7 }
ospfVirtNbrHelloSuppressed OBJECT-TYPE
SYNTAX TruthValue
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"Indicates whether Hellos are being suppressed
to the neighbor"
::= { ospfVirtNbrEntry 8 }
-- OSPF Link State Database, External
-- The Link State Database contains the Link State
-- Advertisements from throughout the areas that the
-- device is attached to.
-- This table is identical to the OSPF LSDB Table in
-- format, but contains only External Link State
-- Advertisements. The purpose is to allow external
-- LSAs to be displayed once for the router rather
-- than once in each non-stub area.
ospfExtLsdbTable OBJECT-TYPE
SYNTAX SEQUENCE OF OspfExtLsdbEntry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"The OSPF Process's Links State Database."
REFERENCE
"OSPF Version 2, Section 12 Link State Adver-
tisements"
::= { ospf 12 }
ospfExtLsdbEntry OBJECT-TYPE
SYNTAX OspfExtLsdbEntry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"A single Link State Advertisement."
INDEX { ospfExtLsdbType, ospfExtLsdbLsid, ospfExtLsdbRouterId }
::= { ospfExtLsdbTable 1 }
OspfExtLsdbEntry ::=
SEQUENCE {
ospfExtLsdbType
INTEGER,
ospfExtLsdbLsid
IpAddress,
ospfExtLsdbRouterId
RouterID,
ospfExtLsdbSequence
Integer32,
ospfExtLsdbAge
Integer32,
ospfExtLsdbChecksum
Integer32,
ospfExtLsdbAdvertisement
OCTET STRING
}
ospfExtLsdbType OBJECT-TYPE
SYNTAX INTEGER {
asExternalLink (5)
}
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The type of the link state advertisement.
Each link state type has a separate advertise-
ment format."
REFERENCE
"OSPF Version 2, Appendix A.4.1 The Link State
Advertisement header"
::= { ospfExtLsdbEntry 1 }
ospfExtLsdbLsid OBJECT-TYPE
SYNTAX IpAddress
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The Link State ID is an LS Type Specific field
containing either a Router ID or an IP Address;
it identifies the piece of the routing domain
that is being described by the advertisement."
REFERENCE
"OSPF Version 2, Section 12.1.4 Link State ID"
::= { ospfExtLsdbEntry 2 }
ospfExtLsdbRouterId OBJECT-TYPE
SYNTAX RouterID
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The 32 bit number that uniquely identifies the
originating router in the Autonomous System."
REFERENCE
"OSPF Version 2, Appendix C.1 Global parameters"
::= { ospfExtLsdbEntry 3 }
-- Note that the OSPF Sequence Number is a 32 bit signed
-- integer. It starts with the value '80000001'h,
-- or -'7FFFFFFF'h, and increments until '7FFFFFFF'h
-- Thus, a typical sequence number will be very negative.
ospfExtLsdbSequence OBJECT-TYPE
SYNTAX Integer32
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The sequence number field is a signed 32-bit
integer. It is used to detect old and dupli-
cate link state advertisements. The space of
sequence numbers is linearly ordered. The
larger the sequence number the more recent the
advertisement."
REFERENCE
"OSPF Version 2, Section 12.1.6 LS sequence
number"
::= { ospfExtLsdbEntry 4 }
ospfExtLsdbAge OBJECT-TYPE
SYNTAX Integer32 -- Should be 0..MaxAge
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"This field is the age of the link state adver-
tisement in seconds."
REFERENCE
"OSPF Version 2, Section 12.1.1 LS age"
::= { ospfExtLsdbEntry 5 }
ospfExtLsdbChecksum OBJECT-TYPE
SYNTAX Integer32
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"This field is the checksum of the complete
contents of the advertisement, excepting the
age field. The age field is excepted so that
an advertisement's age can be incremented
without updating the checksum. The checksum
used is the same that is used for ISO connec-
tionless datagrams; it is commonly referred to
as the Fletcher checksum."
REFERENCE
"OSPF Version 2, Section 12.1.7 LS checksum"
::= { ospfExtLsdbEntry 6 }
ospfExtLsdbAdvertisement OBJECT-TYPE
SYNTAX OCTET STRING (SIZE(36))
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The entire Link State Advertisement, including
its header."
REFERENCE
"OSPF Version 2, Section 12 Link State Adver-
tisements"
::= { ospfExtLsdbEntry 7 }
-- OSPF Use of the CIDR Route Table
ospfRouteGroup OBJECT IDENTIFIER ::= { ospf 13 }
-- The IP Forwarding Table defines a number of objects for use by
-- the routing protocol to externalize its information. Most of
-- the variables (ipForwardDest, ipForwardMask, ipForwardPolicy,
-- ipForwardNextHop, ipForwardIfIndex, ipForwardType,
-- ipForwardProto, ipForwardAge, and ipForwardNextHopAS) are
-- defined there.
-- Those that leave some discretion are defined here.
-- ipCidrRouteProto is, of course, ospf (13).
-- ipCidrRouteAge is the time since the route was first calculated,
-- as opposed to the time since the last SPF run.
-- ipCidrRouteInfo is an OBJECT IDENTIFIER for use by the routing
-- protocol. The following values shall be found there depending
-- on the way the route was calculated.
ospfIntraArea OBJECT IDENTIFIER ::= { ospfRouteGroup 1 }
ospfInterArea OBJECT IDENTIFIER ::= { ospfRouteGroup 2 }
ospfExternalType1 OBJECT IDENTIFIER ::= { ospfRouteGroup 3 }
ospfExternalType2 OBJECT IDENTIFIER ::= { ospfRouteGroup 4 }
-- ipCidrRouteMetric1 is, by definition, the primary routing
-- metric. Therefore, it should be the metric that route
-- selection is based on. For intra-area and inter-area routes,
-- it is an OSPF metric. For External Type 1 (comparable value)
-- routes, it is an OSPF metric plus the External Metric. For
-- external Type 2 (non-comparable value) routes, it is the
-- external metric.
-- ipCidrRouteMetric2 is, by definition, a secondary routing
-- metric. Therefore, it should be the metric that breaks a tie
-- among routes having equal metric1 values and the same
-- calculation rule. For intra-area, inter-area routes, and
-- External Type 1 (comparable value) routes, it is unused. For
-- external Type 2 (non-comparable value) routes, it is the metric
-- to the AS border router.
-- ipCidrRouteMetric3, ipCidrRouteMetric4, and ipCidrRouteMetric5 are
-- unused.
--
-- The OSPF Area Aggregate Table
--
-- This table replaces the OSPF Area Summary Table, being an
-- extension of that for CIDR routers.
ospfAreaAggregateTable OBJECT-TYPE
SYNTAX SEQUENCE OF OspfAreaAggregateEntry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"A range of IP addresses specified by an IP
address/IP network mask pair. For example,
class B address range of X.X.X.X with a network
mask of 255.255.0.0 includes all IP addresses
from X.X.0.0 to X.X.255.255. Note that if
ranges are configured such that one range sub-
sumes another range (e.g., 10.0.0.0 mask
255.0.0.0 and 10.1.0.0 mask 255.255.0.0), the
most specific match is the preferred one."
REFERENCE
"OSPF Version 2, Appendix C.2 Area parameters"
::= { ospf 14 }
ospfAreaAggregateEntry OBJECT-TYPE
SYNTAX OspfAreaAggregateEntry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"A range of IP addresses specified by an IP
address/IP network mask pair. For example,
class B address range of X.X.X.X with a network
mask of 255.255.0.0 includes all IP addresses
from X.X.0.0 to X.X.255.255. Note that if
ranges are range configured such that one range
subsumes another range (e.g., 10.0.0.0 mask
255.0.0.0 and 10.1.0.0 mask 255.255.0.0), the
most specific match is the preferred one."
REFERENCE
"OSPF Version 2, Appendix C.2 Area parameters"
INDEX { ospfAreaAggregateAreaID, ospfAreaAggregateLsdbType,
ospfAreaAggregateNet, ospfAreaAggregateMask }
::= { ospfAreaAggregateTable 1 }
OspfAreaAggregateEntry ::=
SEQUENCE {
ospfAreaAggregateAreaID
AreaID,
ospfAreaAggregateLsdbType
INTEGER,
ospfAreaAggregateNet
IpAddress,
ospfAreaAggregateMask
IpAddress,
ospfAreaAggregateStatus
RowStatus,
ospfAreaAggregateEffect
INTEGER
}
ospfAreaAggregateAreaID OBJECT-TYPE
SYNTAX AreaID
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The Area the Address Aggregate is to be found
within."
REFERENCE
"OSPF Version 2, Appendix C.2 Area parameters"
::= { ospfAreaAggregateEntry 1 }
ospfAreaAggregateLsdbType OBJECT-TYPE
SYNTAX INTEGER {
summaryLink (3),
nssaExternalLink (7)
}
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The type of the Address Aggregate. This field
specifies the Lsdb type that this Address Ag-
gregate applies to."
REFERENCE
"OSPF Version 2, Appendix A.4.1 The Link State
Advertisement header"
::= { ospfAreaAggregateEntry 2 }
ospfAreaAggregateNet OBJECT-TYPE
SYNTAX IpAddress
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The IP Address of the Net or Subnet indicated
by the range."
REFERENCE
"OSPF Version 2, Appendix C.2 Area parameters"
::= { ospfAreaAggregateEntry 3 }
ospfAreaAggregateMask OBJECT-TYPE
SYNTAX IpAddress
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The Subnet Mask that pertains to the Net or
Subnet."
REFERENCE
"OSPF Version 2, Appendix C.2 Area parameters"
::= { ospfAreaAggregateEntry 4 }
ospfAreaAggregateStatus OBJECT-TYPE
SYNTAX RowStatus
MAX-ACCESS read-create
STATUS current
DESCRIPTION
"This variable displays the status of the en-
try. Setting it to 'invalid' has the effect of
rendering it inoperative. The internal effect
(row removal) is implementation dependent."
::= { ospfAreaAggregateEntry 5 }
ospfAreaAggregateEffect OBJECT-TYPE
SYNTAX INTEGER {
advertiseMatching (1),
doNotAdvertiseMatching (2)
}
MAX-ACCESS read-create
STATUS current
DESCRIPTION
"Subnets subsumed by ranges either trigger the
advertisement of the indicated aggregate (ad-
vertiseMatching), or result in the subnet's not
being advertised at all outside the area."
DEFVAL { advertiseMatching }
::= { ospfAreaAggregateEntry 6 }
-- conformance information
ospfConformance OBJECT IDENTIFIER ::= { ospf 15 }
ospfGroups OBJECT IDENTIFIER ::= { ospfConformance 1 }
ospfCompliances OBJECT IDENTIFIER ::= { ospfConformance 2 }
-- compliance statements
ospfCompliance MODULE-COMPLIANCE
STATUS current
DESCRIPTION
"The compliance statement "
MODULE -- this module
MANDATORY-GROUPS {
ospfBasicGroup,
ospfAreaGroup,
ospfStubAreaGroup,
ospfIfGroup,
ospfIfMetricGroup,
ospfVirtIfGroup,
ospfNbrGroup,
ospfVirtNbrGroup,
ospfAreaAggregateGroup
}
::= { ospfCompliances 1 }
-- units of conformance
ospfBasicGroup OBJECT-GROUP
OBJECTS {
ospfRouterId,
ospfAdminStat,
ospfVersionNumber,
ospfAreaBdrRtrStatus,
ospfASBdrRtrStatus,
ospfExternLsaCount,
ospfExternLsaCksumSum,
ospfTOSSupport,
ospfOriginateNewLsas,
ospfRxNewLsas,
ospfExtLsdbLimit,
ospfMulticastExtensions,
ospfExitOverflowInterval,
ospfDemandExtensions
}
STATUS current
DESCRIPTION
"These objects are required for OSPF systems."
::= { ospfGroups 1 }
ospfAreaGroup OBJECT-GROUP
OBJECTS {
ospfAreaId,
ospfImportAsExtern,
ospfSpfRuns,
ospfAreaBdrRtrCount,
ospfAsBdrRtrCount,
ospfAreaLsaCount,
ospfAreaLsaCksumSum,
ospfAreaSummary,
ospfAreaStatus
}
STATUS current
DESCRIPTION
"These objects are required for OSPF systems
supporting areas."
::= { ospfGroups 2 }
ospfStubAreaGroup OBJECT-GROUP
OBJECTS {
ospfStubAreaId,
ospfStubTOS,
ospfStubMetric,
ospfStubStatus,
ospfStubMetricType
}
STATUS current
DESCRIPTION
"These objects are required for OSPF systems
supporting stub areas."
::= { ospfGroups 3 }
ospfLsdbGroup OBJECT-GROUP
OBJECTS {
ospfLsdbAreaId,
ospfLsdbType,
ospfLsdbLsid,
ospfLsdbRouterId,
ospfLsdbSequence,
ospfLsdbAge,
ospfLsdbChecksum,
ospfLsdbAdvertisement
}
STATUS current
DESCRIPTION
"These objects are required for OSPF systems
that display their link state database."
::= { ospfGroups 4 }
ospfAreaRangeGroup OBJECT-GROUP
OBJECTS {
ospfAreaRangeAreaId,
ospfAreaRangeNet,
ospfAreaRangeMask,
ospfAreaRangeStatus,
ospfAreaRangeEffect
}
STATUS obsolete
DESCRIPTION
"These objects are required for non-CIDR OSPF
systems that support multiple areas."
::= { ospfGroups 5 }
ospfHostGroup OBJECT-GROUP
OBJECTS {
ospfHostIpAddress,
ospfHostTOS,
ospfHostMetric,
ospfHostStatus,
ospfHostAreaID
}
STATUS current
DESCRIPTION
"These objects are required for OSPF systems
that support attached hosts."
::= { ospfGroups 6 }
ospfIfGroup OBJECT-GROUP
OBJECTS {
ospfIfIpAddress,
ospfAddressLessIf,
ospfIfAreaId,
ospfIfType,
ospfIfAdminStat,
ospfIfRtrPriority,
ospfIfTransitDelay,
ospfIfRetransInterval,
ospfIfHelloInterval,
ospfIfRtrDeadInterval,
ospfIfPollInterval,
ospfIfState,
ospfIfDesignatedRouter,
ospfIfBackupDesignatedRouter,
ospfIfEvents,
ospfIfAuthType,
ospfIfAuthKey,
ospfIfStatus,
ospfIfMulticastForwarding,
ospfIfDemand
}
STATUS current
DESCRIPTION
"These objects are required for OSPF systems."
::= { ospfGroups 7 }
ospfIfMetricGroup OBJECT-GROUP
OBJECTS {
ospfIfMetricIpAddress,
ospfIfMetricAddressLessIf,
ospfIfMetricTOS,
ospfIfMetricValue,
ospfIfMetricStatus
}
STATUS current
DESCRIPTION
"These objects are required for OSPF systems."
::= { ospfGroups 8 }
ospfVirtIfGroup OBJECT-GROUP
OBJECTS {
ospfVirtIfAreaId,
ospfVirtIfNeighbor,
ospfVirtIfTransitDelay,
ospfVirtIfRetransInterval,
ospfVirtIfHelloInterval,
ospfVirtIfRtrDeadInterval,
ospfVirtIfState,
ospfVirtIfEvents,
ospfVirtIfAuthType,
ospfVirtIfAuthKey,
ospfVirtIfStatus
}
STATUS current
DESCRIPTION
"These objects are required for OSPF systems."
::= { ospfGroups 9 }
ospfNbrGroup OBJECT-GROUP
OBJECTS {
ospfNbrIpAddr,
ospfNbrAddressLessIndex,
ospfNbrRtrId,
ospfNbrOptions,
ospfNbrPriority,
ospfNbrState,
ospfNbrEvents,
ospfNbrLsRetransQLen,
ospfNbmaNbrStatus,
ospfNbmaNbrPermanence,
ospfNbrHelloSuppressed
}
STATUS current
DESCRIPTION
"These objects are required for OSPF systems."
::= { ospfGroups 10 }
ospfVirtNbrGroup OBJECT-GROUP
OBJECTS {
ospfVirtNbrArea,
ospfVirtNbrRtrId,
ospfVirtNbrIpAddr,
ospfVirtNbrOptions,
ospfVirtNbrState,
ospfVirtNbrEvents,
ospfVirtNbrLsRetransQLen,
ospfVirtNbrHelloSuppressed
}
STATUS current
DESCRIPTION
"These objects are required for OSPF systems."
::= { ospfGroups 11 }
ospfExtLsdbGroup OBJECT-GROUP
OBJECTS {
ospfExtLsdbType,
ospfExtLsdbLsid,
ospfExtLsdbRouterId,
ospfExtLsdbSequence,
ospfExtLsdbAge,
ospfExtLsdbChecksum,
ospfExtLsdbAdvertisement
}
STATUS current
DESCRIPTION
"These objects are required for OSPF systems
that display their link state database."
::= { ospfGroups 12 }
ospfAreaAggregateGroup OBJECT-GROUP
OBJECTS {
ospfAreaAggregateAreaID,
ospfAreaAggregateLsdbType,
ospfAreaAggregateNet,
ospfAreaAggregateMask,
ospfAreaAggregateStatus,
ospfAreaAggregateEffect
}
STATUS current
DESCRIPTION
"These objects are required for OSPF systems."
::= { ospfGroups 13 }
END
4. OSPF Traps
OSPF is an event driven routing protocol, where an event can be a
change in an OSPF interface's link-level status, the expiration of an
OSPF timer or the reception of an OSPF protocol packet. Many of the
actions that OSPF takes as a result of these events will result in a
change of the routing topology. As routing topologies become large
and complex it is often difficult to locate the source of a topology
change or unpredicted routing path by polling a large number or
routers. Another approach is to notify a network manager of
potentially critical OSPF events with SNMP traps.
This section defines a set of traps, objects and mechanisms to enhance the ability to manage IP internetworks which use OSPF as its IGP. It is an optional but useful extension to the OSPF MIB. 4.1. Format Of Trap Definitions Section 7 contains contains the trap definitions. 4.2. Approach The mechanism for sending traps is straight-forward. When an exception event occurs, the application notifies the local agent who sends a trap to the appropriate SNMP management stations. The message includes the trap type and may include a list of trap specific variables. A new object is defined in section 3.2 that will allow a network manager to enable or disable particular OSPF traps. Section 5 gives the trap definitions which includes the variable lists. The router ID of the originator of the trap is included in the variable list so that the network manager may easily determine the source of the trap. To limit the frequency of OSPF traps, the following additional mechanisms are suggested. 4.3. Ignoring Initial Activity The majority of critical events occur when OSPF is enabled on a router, at which time the designated router is elected and neighbor adjacencies are formed. During this initial period a potential flood of traps is unnecessary since the events are expected. To avoid unnecessary traps, a router should not originate expected OSPF interface related traps until two of that interface's dead timer intervals have elapsed. The expected OSPF interface traps are ospfIfStateChange, ospfVirtIfStateChange, ospfNbrStateChange, ospfVirtNbrStateChange, ospfTxRetranmit and ospfVirtIfTxRetransmit. Additionally, ospfMaxAgeLsa and ospfOriginateLsa traps should not be originated until two dead timer intervals have elapsed where the dead timer interval used should be the dead timer with the smallest value. 4.4. Throttling Traps The mechanism for throttling the traps is similar to the mechanism explained in RFC 1224 [11], section 5. The basic idea is that there is a sliding window in seconds and an upper bound on the number of traps that may be generated within this window. Unlike RFC 1224, traps are not sent to inform the network manager that the throttling mechanism has kicked in.
A single window should be used to throttle all OSPF traps types except for the ospfLsdbOverflow and the ospfLsdbApproachingOverflow trap which should not be throttled. For example, if the window time is 3, the upper bound is 3 and the events that would cause trap types 1,3,5 and 7 occur within a 3 second period, the type 7 trap should not be generated. Appropriate values are 7 traps with a window time of 10 seconds. 4.5. One Trap Per OSPF Event Several of the traps defined in section 5 are generated as the result of finding an unusual condition while parsing an OSPF packet or a processing a timer event. There may be more than one unusual condition detected while handling the event. For example, a link- state update packet may contain several retransmitted link-state advertisements (LSAs), or a retransmitted database description packet may contain several database description entries. To limit the number of traps and variables, OSPF should generate at most one trap per OSPF event. Only the variables associated with the first unusual condition should be included with the trap. Similarly, if more than one type of unusual condition is encountered while parsing the packet, only the first event will generate a trap. 4.6. Polling Event Counters Many of the tables in the OSPF MIB contain generalized event counters. By enabling the traps defined in this document a network manager can obtain more specific information about these events. A network manager may want to poll these event counters and enable specific OSPF traps when a particular counter starts increasing abnormally. The following table shows the relationship between the event counters defined in the OSPF MIB and the trap types defined in section 5. Counter32 Trap Type ----------------------- ------------------------ ospfOriginateNewLsas ospfOriginateLsa ospfIfEvents ospfIfStateChange ospfConfigError ospfIfAuthFailure ospfRxBadPacket ospfTxRetransmit ospfVirtIfEvents ospfVirtIfStateChange ospfVirtIfConfigError ospfVirtIfAuthFailure
ospfVirtIfRxBadPacket
ospfVirtIfTxRetransmit
ospfNbrEvents ospfNbrStateChange
ospfVirtNbrEvents ospfVirtNbrStateChange
ospfExternLSACount ospfLsdbApproachingOverflow
ospfExternLSACount ospfLsdbOverflow
5. OSPF Trap Definitions
OSPF-TRAP-MIB DEFINITIONS ::= BEGIN
IMPORTS
MODULE-IDENTITY, OBJECT-TYPE, NOTIFICATION-TYPE, IpAddress
FROM SNMPv2-SMI
MODULE-COMPLIANCE, OBJECT-GROUP
FROM SNMPv2-CONF
ospfRouterId, ospfIfIpAddress, ospfAddressLessIf, ospfIfState,
ospfVirtIfAreaId, ospfVirtIfNeighbor, ospfVirtIfState,
ospfNbrIpAddr, ospfNbrAddressLessIndex, ospfNbrRtrId,
ospfNbrState, ospfVirtNbrArea, ospfVirtNbrRtrId, ospfVirtNbrState,
ospfLsdbType, ospfLsdbLsid, ospfLsdbRouterId, ospfLsdbAreaId,
ospfExtLsdbLimit, ospf
FROM OSPF-MIB;
ospfTrap MODULE-IDENTITY
LAST-UPDATED "9501201225Z" -- Fri Jan 20 12:25:50 PST 1995
ORGANIZATION "IETF OSPF Working Group"
CONTACT-INFO
" Fred Baker
Postal: Cisco Systems
519 Lado Drive
Santa Barbara, California 93111
Tel: +1 805 681 0115
E-Mail: fred@cisco.com
Rob Coltun
Postal: RainbowBridge Communications
Tel: (301) 340-9416
E-Mail: rcoltun@rainbow-bridge.com"
DESCRIPTION
"The MIB module to describe traps for the OSPF
Version 2 Protocol."
::= { ospf 16 }
-- Trap Support Objects
-- The following are support objects for the OSPF traps.
ospfTrapControl OBJECT IDENTIFIER ::= { ospfTrap 1 }
ospfTraps OBJECT IDENTIFIER ::= { ospfTrap 2 }
ospfSetTrap OBJECT-TYPE
SYNTAX OCTET STRING (SIZE(4))
MAX-ACCESS read-write
STATUS current
DESCRIPTION
"A four-octet string serving as a bit map for
the trap events defined by the OSPF traps. This
object is used to enable and disable specific
OSPF traps where a 1 in the bit field
represents enabled. The right-most bit (least
significant) represents trap 0."
::= { ospfTrapControl 1 }
ospfConfigErrorType OBJECT-TYPE
SYNTAX INTEGER {
badVersion (1),
areaMismatch (2),
unknownNbmaNbr (3), -- Router is Dr eligible
unknownVirtualNbr (4),
authTypeMismatch(5),
authFailure (6),
netMaskMismatch (7),
helloIntervalMismatch (8),
deadIntervalMismatch (9),
optionMismatch (10) }
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"Potential types of configuration conflicts.
Used by the ospfConfigError and ospfConfigVir-
tError traps."
::= { ospfTrapControl 2 }
ospfPacketType OBJECT-TYPE
SYNTAX INTEGER {
hello (1),
dbDescript (2),
lsReq (3),
lsUpdate (4),
lsAck (5) }
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"OSPF packet types."
::= { ospfTrapControl 3 }
ospfPacketSrc OBJECT-TYPE
SYNTAX IpAddress
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The IP address of an inbound packet that can-
not be identified by a neighbor instance."
::= { ospfTrapControl 4 }
-- Traps
ospfIfStateChange NOTIFICATION-TYPE
OBJECTS {
ospfRouterId, -- The originator of the trap
ospfIfIpAddress,
ospfAddressLessIf,
ospfIfState -- The new state
}
STATUS current
DESCRIPTION
"An ospfIfStateChange trap signifies that there
has been a change in the state of a non-virtual
OSPF interface. This trap should be generated
when the interface state regresses (e.g., goes
from Dr to Down) or progresses to a terminal
state (i.e., Point-to-Point, DR Other, Dr, or
Backup)."
::= { ospfTraps 16 }
ospfVirtIfStateChange NOTIFICATION-TYPE
OBJECTS {
ospfRouterId, -- The originator of the trap
ospfVirtIfAreaId,
ospfVirtIfNeighbor,
ospfVirtIfState -- The new state
}
STATUS current
DESCRIPTION
"An ospfIfStateChange trap signifies that there
has been a change in the state of an OSPF vir-
tual interface.
This trap should be generated when the inter-
face state regresses (e.g., goes from Point-
to-Point to Down) or progresses to a terminal
state (i.e., Point-to-Point)."
::= { ospfTraps 1 }
ospfNbrStateChange NOTIFICATION-TYPE
OBJECTS {
ospfRouterId, -- The originator of the trap
ospfNbrIpAddr,
ospfNbrAddressLessIndex,
ospfNbrRtrId,
ospfNbrState -- The new state
}
STATUS current
DESCRIPTION
"An ospfNbrStateChange trap signifies that
there has been a change in the state of a non-
virtual OSPF neighbor. This trap should be
generated when the neighbor state regresses
(e.g., goes from Attempt or Full to 1-Way or
Down) or progresses to a terminal state (e.g.,
2-Way or Full). When an neighbor transitions
from or to Full on non-broadcast multi-access
and broadcast networks, the trap should be gen-
erated by the designated router. A designated
router transitioning to Down will be noted by
ospfIfStateChange."
::= { ospfTraps 2 }
ospfVirtNbrStateChange NOTIFICATION-TYPE
OBJECTS {
ospfRouterId, -- The originator of the trap
ospfVirtNbrArea,
ospfVirtNbrRtrId,
ospfVirtNbrState -- The new state
}
STATUS current
DESCRIPTION
"An ospfIfStateChange trap signifies that there
has been a change in the state of an OSPF vir-
tual neighbor. This trap should be generated
when the neighbor state regresses (e.g., goes
from Attempt or Full to 1-Way or Down) or
progresses to a terminal state (e.g., Full)."
::= { ospfTraps 3 }
ospfIfConfigError NOTIFICATION-TYPE
OBJECTS {
ospfRouterId, -- The originator of the trap
ospfIfIpAddress,
ospfAddressLessIf,
ospfPacketSrc, -- The source IP address
ospfConfigErrorType, -- Type of error
ospfPacketType
}
STATUS current
DESCRIPTION
"An ospfIfConfigError trap signifies that a
packet has been received on a non-virtual in-
terface from a router whose configuration
parameters conflict with this router's confi-
guration parameters. Note that the event op-
tionMismatch should cause a trap only if it
prevents an adjacency from forming."
::= { ospfTraps 4 }
ospfVirtIfConfigError NOTIFICATION-TYPE
OBJECTS {
ospfRouterId, -- The originator of the trap
ospfVirtIfAreaId,
ospfVirtIfNeighbor,
ospfConfigErrorType, -- Type of error
ospfPacketType
}
STATUS current
DESCRIPTION
"An ospfConfigError trap signifies that a pack-
et has been received on a virtual interface
from a router whose configuration parameters
conflict with this router's configuration
parameters. Note that the event optionMismatch
should cause a trap only if it prevents an ad-
jacency from forming."
::= { ospfTraps 5 }
ospfIfAuthFailure NOTIFICATION-TYPE
OBJECTS {
ospfRouterId, -- The originator of the trap
ospfIfIpAddress,
ospfAddressLessIf,
ospfPacketSrc, -- The source IP address
ospfConfigErrorType, -- authTypeMismatch or
-- authFailure
ospfPacketType
}
STATUS current
DESCRIPTION
"An ospfIfAuthFailure trap signifies that a
packet has been received on a non-virtual in-
terface from a router whose authentication key
or authentication type conflicts with this
router's authentication key or authentication
type."
::= { ospfTraps 6 }
ospfVirtIfAuthFailure NOTIFICATION-TYPE
OBJECTS {
ospfRouterId, -- The originator of the trap
ospfVirtIfAreaId,
ospfVirtIfNeighbor,
ospfConfigErrorType, -- authTypeMismatch or
-- authFailure
ospfPacketType
}
STATUS current
DESCRIPTION
"An ospfVirtIfAuthFailure trap signifies that a
packet has been received on a virtual interface
from a router whose authentication key or au-
thentication type conflicts with this router's
authentication key or authentication type."
::= { ospfTraps 7 }
ospfIfRxBadPacket NOTIFICATION-TYPE
OBJECTS {
ospfRouterId, -- The originator of the trap
ospfIfIpAddress,
ospfAddressLessIf,
ospfPacketSrc, -- The source IP address
ospfPacketType
}
STATUS current
DESCRIPTION
"An ospfIfRxBadPacket trap signifies that an
OSPF packet has been received on a non-virtual
interface that cannot be parsed."
::= { ospfTraps 8 }
ospfVirtIfRxBadPacket NOTIFICATION-TYPE
OBJECTS {
ospfRouterId, -- The originator of the trap
ospfVirtIfAreaId,
ospfVirtIfNeighbor,
ospfPacketType
}
STATUS current
DESCRIPTION
"An ospfRxBadPacket trap signifies that an OSPF
packet has been received on a virtual interface
that cannot be parsed."
::= { ospfTraps 9 }
ospfTxRetransmit NOTIFICATION-TYPE
OBJECTS {
ospfRouterId, -- The originator of the trap
ospfIfIpAddress,
ospfAddressLessIf,
ospfNbrRtrId, -- Destination
ospfPacketType,
ospfLsdbType,
ospfLsdbLsid,
ospfLsdbRouterId
}
STATUS current
DESCRIPTION
"An ospfTxRetransmit trap signifies than an
OSPF packet has been retransmitted on a non-
virtual interface. All packets that may be re-
transmitted are associated with an LSDB entry.
The LS type, LS ID, and Router ID are used to
identify the LSDB entry."
::= { ospfTraps 10 }
ospfVirtIfTxRetransmit NOTIFICATION-TYPE
OBJECTS {
ospfRouterId, -- The originator of the trap
ospfVirtIfAreaId,
ospfVirtIfNeighbor,
ospfPacketType,
ospfLsdbType,
ospfLsdbLsid,
ospfLsdbRouterId
}
STATUS current
DESCRIPTION
"An ospfTxRetransmit trap signifies than an
OSPF packet has been retransmitted on a virtual
interface. All packets that may be retransmit-
ted are associated with an LSDB entry. The LS
type, LS ID, and Router ID are used to identify
the LSDB entry."
::= { ospfTraps 11 }
ospfOriginateLsa NOTIFICATION-TYPE
OBJECTS {
ospfRouterId, -- The originator of the trap
ospfLsdbAreaId, -- 0.0.0.0 for AS Externals
ospfLsdbType,
ospfLsdbLsid,
ospfLsdbRouterId
}
STATUS current
DESCRIPTION
"An ospfOriginateLsa trap signifies that a new
LSA has been originated by this router. This
trap should not be invoked for simple refreshes
of LSAs (which happesn every 30 minutes), but
instead will only be invoked when an LSA is
(re)originated due to a topology change. Addi-
tionally, this trap does not include LSAs that
are being flushed because they have reached
MaxAge."
::= { ospfTraps 12 }
ospfMaxAgeLsa NOTIFICATION-TYPE
OBJECTS {
ospfRouterId, -- The originator of the trap
ospfLsdbAreaId, -- 0.0.0.0 for AS Externals
ospfLsdbType,
ospfLsdbLsid,
ospfLsdbRouterId
}
STATUS current
DESCRIPTION
"An ospfMaxAgeLsa trap signifies that one of
the LSA in the router's link-state database has
aged to MaxAge."
::= { ospfTraps 13 }
ospfLsdbOverflow NOTIFICATION-TYPE
OBJECTS {
ospfRouterId, -- The originator of the trap
ospfExtLsdbLimit
}
STATUS current
DESCRIPTION
"An ospfLsdbOverflow trap signifies that the
number of LSAs in the router's link-state data-
base has exceeded ospfExtLsdbLimit."
::= { ospfTraps 14 }
ospfLsdbApproachingOverflow NOTIFICATION-TYPE
OBJECTS {
ospfRouterId, -- The originator of the trap
ospfExtLsdbLimit
}
STATUS current
DESCRIPTION
"An ospfLsdbApproachingOverflow trap signifies
that the number of LSAs in the router's link-
state database has exceeded ninety percent of
ospfExtLsdbLimit."
::= { ospfTraps 15 }
-- conformance information
ospfTrapConformance OBJECT IDENTIFIER ::= { ospfTrap 3 }
ospfTrapGroups OBJECT IDENTIFIER ::= { ospfTrapConformance 1 }
ospfTrapCompliances OBJECT IDENTIFIER ::= { ospfTrapConformance 2 }
-- compliance statements
ospfTrapCompliance MODULE-COMPLIANCE
STATUS current
DESCRIPTION
"The compliance statement "
MODULE -- this module
MANDATORY-GROUPS { ospfTrapControlGroup }
GROUP ospfTrapControlGroup
DESCRIPTION
"This group is optional but recommended for all
OSPF systems"
::= { ospfTrapCompliances 1 }
-- units of conformance
ospfTrapControlGroup OBJECT-GROUP
OBJECTS {
ospfSetTrap,
ospfConfigErrorType,
ospfPacketType,
ospfPacketSrc
}
STATUS current
DESCRIPTION
"These objects are required to control traps
from OSPF systems."
::= { ospfTrapGroups 1 }
END
6. Acknowledgements
This document was produced by the OSPF Working Group.
7. References
[1] Cerf, V., "IAB Recommendations for the Development of Internet
Network Management Standards", RFC 1052, NRI, April 1988.
[2] Cerf, V., "Report of the Second Ad Hoc Network Management Review
Group", RFC 1109, NRI, August 1989.
[3] Rose M., and K. McCloghrie, "Structure and Identification of
Management Information for TCP/IP-based internets", STD 16, RFC
1155, Performance Systems International, Hughes LAN Systems, May
1990.
[4] McCloghrie K., and M. Rose, "Management Information Base for
Network Management of TCP/IP-based internets", RFC 1156, Hughes
LAN Systems, Performance Systems International, May 1990.
[5] Case, J., Fedor, M., Schoffstall, M., and J. Davin, "Simple
Network Management Protocol", STD 15, RFC 1157, SNMP Research,
Performance Systems International, Performance Systems
International, MIT Laboratory for Computer Science, May 1990.
[6] Rose M., Editor, "Management Information Base for Network Management of TCP/IP-based internets: MIB-II", STD 17, RFC 1213, Performance Systems International, March 1991. [7] Information processing systems - Open Systems Interconnection - Specification of Abstract Syntax Notation One (ASN.1), International Organization for Standardization, International Standard 8824, December 1987. [8] Information processing systems - Open Systems Interconnection - Specification of Basic Encoding Rules for Abstract Notation One (ASN.1), International Organization for Standardization, International Standard 8825, December 1987. [9] Rose, M., and K. McCloghrie, Editors, "Concise MIB Definitions", STD 16, RFC 1212, Performance Systems International, Hughes LAN Systems, March 1991. [10] Rose, M., Editor, "A Convention for Defining Traps for use with the SNMP", RFC 1215, Performance Systems International, March 1991. [11] Steinberg, L., "Techniques for Managing Asynchronously Generated Alerts", RFC 1224, IBM Corporation, May 1991. [12] Moy, J., "Multicast Extensions to OSPF", RFC 1584, Proteon, Inc., September 1993.
8. Security Considerations Security issues are not discussed in this memo. 9. Authors' Addresses Fred Baker cisco Systems, Inc. 519 Lado Drive Santa Barbara, CA 93111 Phone: (805) 681-0115 EMail: fred@cisco.com Rob Coltun RainbowBridge Communications Phone: (301) 340-9416 EMail: rcoltun@rainbow-bridge.com