CISCO-CEF-MIB

Cisco Express Forwarding (CEF) describes a high speed 
        switching mechanism that a router uses to forward packets
        from the inbound to the outbound interface. 
        
        CEF uses two sets of data structures
        or tables, which it stores in router memory:
        
        Forwarding information base (FIB) - Describes a database
        of information used to make forwarding decisions. It is 
        conceptually similar to a routing table or route-cache, 
        although its implementation is different.
        
        Adjacency - Two nodes in the network are said to be 
        adjacent if they can reach each other via a single hop 
        across a link layer.           
        
        CEF path is a valid route to reach to a destination 
        IP prefix. Multiple paths may exist out of a router to the 
        same destination prefix. CEF Load balancing capability 
        share the traffic to the destination IP prefix over all 
        the active paths. 
        
        After obtaining the prefix in the CEF table with the
        longest match, output forwarding follows the chain of 
        forwarding elements. 
        
        Forwarding element (FE) may process the packet, forward 
        the packet, drop or punt the packet or it may also
        pass the packet to the next forwarding element in the 
        chain for further processing.
        
        Forwarding Elements are of various types
        but this MIB only represents the forwarding elements of
        adjacency and label types. Hence a forwarding element 
        chain will be represented as a list of labels and
        adjacency. The adjacency may point to a forwarding element
        list again, if it is not the last forwarding element in this
        chain. 
        
        For the simplest IP forwarding case, the prefix entry will 
        point at an adjacency forwarding element.
        The IP adjacency processing function will apply the output
        features, add the encapsulation (performing any required 
        fixups), and may send the packet out.
        
        If loadbalancing is configured, the prefix entry will point 
        to lists of forwarding elements. One of these lists will be 
        selected to forward the packet. 
        
        Each forwarding element list dictates which of a set of 
        possible packet transformations to apply on the way to 
        the same neighbour. 
        
        The following diagram represents relationship
        between three of the core tables in this MIB module.
        
         cefPrefixTable             cefFESelectionTable
        
         +---------------+  points           +--------------+   
         |   |     |     |  a set     +----> |   |   |   |  | 
         |---------------|  of FE     |      |--------------|   
         |   |     |     |  Selection |      |   |   |   |  |
         |---------------|  Entries   |      |--------------|    
         |   |     |     |------------+      |              |<----+ 
         |---------------|                   |--------------|     |
         |               |    +--------------|   |   |   |  |     |
         +---------------+    |              +--------------+     |
                              |                                   |
                        points to an                              |
                        adjacency entry                           |
                              |                                   |
                              |   cefAdjTable                     |
                              |  +---------------+  may point     |
                              +->|   |     |     |  to a set      |
                                 |---------------|  of FE         |
                                 |   |     |     |  Selection     |
                                 |---------------|  Entries       | 
                                 |   |     |     |----------------+
                                 |---------------| 
                                 |               | 
                                 +---------------+ 
        
        Some of the Cisco series routers (e.g. 7500 & 12000) 
        support distributed CEF (dCEF), in which the line cards 
        (LCs) make the packet forwarding decisions using locally 
        stored copies of the same Forwarding information base (FIB)
        and adjacency tables as the Routing Processor (RP).
                  
        Inter-Process Communication (IPC) is the protocol used 
        by routers that support distributed packet forwarding. 
        CEF updates are encoded as external Data Representation 
        (XDR) information elements inside IPC messages. 
                 
        This MIB reflects the distributed nature of CEF, e.g. CEF
        has different instances running on the RP and the line cards.
        
        There may be instances of inconsistency between the
        CEF forwarding databases(i.e between CEF forwarding 
        database on line cards and the CEF forwarding database
        on the RP). CEF consistency checkers (CC) detects 
        this inconsistency.
        
        When two databases are compared by a consistency checker, 
        a set of records from the first (master) database is 
        looked up in the second (slave).
        
        There are two types of consistency checkers, 
        active and passive. Active consistency checkers 
        are invoked in response to some stimulus, i.e. 
        when a packet cannot be forwarded because the 
        prefix is not in the forwarding table or 
        in response to a Management Station request.
        
        Passive consistency checkers operate in the background, 
        scanning portions of the databases on a periodic basis.
        
        The full-scan checkers are active consistency checkers
        which are invoked in response to a Management Station
        Request.
        
        If 64-bit counter objects in this MIB are supported,
        then their associated 32-bit counter objects 
        must also be supported. The 32-bit counters will
        report the low 32-bits of the associated 64-bit 
        counter count (e.g., cefPrefixPkts will report the 
        least significant 32 bits of cefPrefixHCPkts).
        The same rule should be applied for the 64-bit gauge
        objects and their assocaited 32-bit gauge objects.
        
        If 64-bit counters in this MIB are not supported,
        then an agent MUST NOT instantiate the corresponding
        objects with an incorrect value; rather, it MUST 
        respond with the appropriate error/exception 
        condition (e.g., noSuchInstance or noSuchName). 
        
        Counters related to CEF accounting (e.g.,
        cefPrefixPkts) MUST NOT be instantiated if the
        corresponding accounting method has been disabled.  
         
        This MIB allows configuration and monitoring of CEF 
        related objects.

Imported Objects

CefIpVersion, CefAdjLinkType, CefAdjacencySource, CefPathType, CefPrefixSearchState, CefForwardingElementSpecialType, CefMplsLabelList, CefAdminStatus, CefOperStatus, CefFailureReason, CefCCType, CefCCAction, CefCCStatusCISCO-CEF-TC
ciscoMgmtCISCO-SMI
EntPhysicalIndexOrZeroCISCO-TC
entPhysicalIndex, PhysicalIndexENTITY-MIB
CounterBasedGauge64HCNUM-TC
ifIndex, InterfaceIndexOrZeroIF-MIB
InetAddressType, InetAddress, InetAddressPrefixLengthINET-ADDRESS-MIB
MplsVpnIdMPLS-VPN-MIB
SnmpAdminStringSNMP-FRAMEWORK-MIB
MODULE-COMPLIANCE, OBJECT-GROUP, NOTIFICATION-GROUPSNMPv2-CONF
MODULE-IDENTITY, OBJECT-TYPE, NOTIFICATION-TYPE, Counter64, Counter32, Integer32, Gauge32, Unsigned32SNMPv2-SMI
TimeStamp, RowStatus, TruthValue, TestAndIncrSNMPv2-TC
ciscoCefMIB .1.3.6.1.4.1.9.9.492
ciscoCefMIBNotifs .1.3.6.1.4.1.9.9.492.0
cefResourceFailure .1.3.6.1.4.1.9.9.492.0.1
cefPeerStateChange .1.3.6.1.4.1.9.9.492.0.2
cefPeerFIBStateChange .1.3.6.1.4.1.9.9.492.0.3
cefInconsistencyDetection .1.3.6.1.4.1.9.9.492.0.4
ciscoCefMIBObjects .1.3.6.1.4.1.9.9.492.1
cefFIB .1.3.6.1.4.1.9.9.492.1.1
cefFIBSummary .1.3.6.1.4.1.9.9.492.1.1.1
cefFIBSummaryTable .1.3.6.1.4.1.9.9.492.1.1.1.1
cefFIBSummaryEntry .1.3.6.1.4.1.9.9.492.1.1.1.1.1
cefFIBIpVersion .1.3.6.1.4.1.9.9.492.1.1.1.1.1.1
cefFIBSummaryFwdPrefixes .1.3.6.1.4.1.9.9.492.1.1.1.1.1.2
cefPrefixTable .1.3.6.1.4.1.9.9.492.1.1.2
cefPrefixEntry .1.3.6.1.4.1.9.9.492.1.1.2.1
cefPrefixType .1.3.6.1.4.1.9.9.492.1.1.2.1.1
cefPrefixInternalNRHCPkts .1.3.6.1.4.1.9.9.492.1.1.2.1.10
cefPrefixInternalNRBytes .1.3.6.1.4.1.9.9.492.1.1.2.1.11
cefPrefixInternalNRHCBytes .1.3.6.1.4.1.9.9.492.1.1.2.1.12
cefPrefixExternalNRPkts .1.3.6.1.4.1.9.9.492.1.1.2.1.13
cefPrefixExternalNRHCPkts .1.3.6.1.4.1.9.9.492.1.1.2.1.14
cefPrefixExternalNRBytes .1.3.6.1.4.1.9.9.492.1.1.2.1.15
cefPrefixExternalNRHCBytes .1.3.6.1.4.1.9.9.492.1.1.2.1.16
cefPrefixAddr .1.3.6.1.4.1.9.9.492.1.1.2.1.2
cefPrefixLen .1.3.6.1.4.1.9.9.492.1.1.2.1.3
cefPrefixForwardingInfo .1.3.6.1.4.1.9.9.492.1.1.2.1.4
cefPrefixPkts .1.3.6.1.4.1.9.9.492.1.1.2.1.5
cefPrefixHCPkts .1.3.6.1.4.1.9.9.492.1.1.2.1.6
cefPrefixBytes .1.3.6.1.4.1.9.9.492.1.1.2.1.7
cefPrefixHCBytes .1.3.6.1.4.1.9.9.492.1.1.2.1.8
cefPrefixInternalNRPkts .1.3.6.1.4.1.9.9.492.1.1.2.1.9
cefLMPrefixSpinLock .1.3.6.1.4.1.9.9.492.1.1.3
cefLMPrefixTable .1.3.6.1.4.1.9.9.492.1.1.4
cefLMPrefixEntry .1.3.6.1.4.1.9.9.492.1.1.4.1
cefLMPrefixDestAddrType .1.3.6.1.4.1.9.9.492.1.1.4.1.1
cefLMPrefixDestAddr .1.3.6.1.4.1.9.9.492.1.1.4.1.2
cefLMPrefixState .1.3.6.1.4.1.9.9.492.1.1.4.1.3
cefLMPrefixAddr .1.3.6.1.4.1.9.9.492.1.1.4.1.4
cefLMPrefixLen .1.3.6.1.4.1.9.9.492.1.1.4.1.5
cefLMPrefixRowStatus .1.3.6.1.4.1.9.9.492.1.1.4.1.6
cefPathTable .1.3.6.1.4.1.9.9.492.1.1.5
cefPathEntry .1.3.6.1.4.1.9.9.492.1.1.5.1
cefPathId .1.3.6.1.4.1.9.9.492.1.1.5.1.1
cefPathType .1.3.6.1.4.1.9.9.492.1.1.5.1.2
cefPathInterface .1.3.6.1.4.1.9.9.492.1.1.5.1.3
cefPathNextHopAddr .1.3.6.1.4.1.9.9.492.1.1.5.1.4
cefPathRecurseVrfName .1.3.6.1.4.1.9.9.492.1.1.5.1.5
cefAdj .1.3.6.1.4.1.9.9.492.1.2
cefAdjSummary .1.3.6.1.4.1.9.9.492.1.2.1
cefAdjSummaryTable .1.3.6.1.4.1.9.9.492.1.2.1.1
cefAdjSummaryEntry .1.3.6.1.4.1.9.9.492.1.2.1.1.1
cefAdjSummaryLinkType .1.3.6.1.4.1.9.9.492.1.2.1.1.1.1
cefAdjSummaryComplete .1.3.6.1.4.1.9.9.492.1.2.1.1.1.2
cefAdjSummaryIncomplete .1.3.6.1.4.1.9.9.492.1.2.1.1.1.3
cefAdjSummaryFixup .1.3.6.1.4.1.9.9.492.1.2.1.1.1.4
cefAdjSummaryRedirect .1.3.6.1.4.1.9.9.492.1.2.1.1.1.5
cefAdjTable .1.3.6.1.4.1.9.9.492.1.2.2
cefAdjEntry .1.3.6.1.4.1.9.9.492.1.2.2.1
cefAdjNextHopAddrType .1.3.6.1.4.1.9.9.492.1.2.2.1.1
cefAdjHCPkts .1.3.6.1.4.1.9.9.492.1.2.2.1.10
cefAdjBytes .1.3.6.1.4.1.9.9.492.1.2.2.1.11
cefAdjHCBytes .1.3.6.1.4.1.9.9.492.1.2.2.1.12
cefAdjNextHopAddr .1.3.6.1.4.1.9.9.492.1.2.2.1.2
cefAdjConnId .1.3.6.1.4.1.9.9.492.1.2.2.1.3
cefAdjSource .1.3.6.1.4.1.9.9.492.1.2.2.1.4
cefAdjEncap .1.3.6.1.4.1.9.9.492.1.2.2.1.5
cefAdjFixup .1.3.6.1.4.1.9.9.492.1.2.2.1.6
cefAdjMTU .1.3.6.1.4.1.9.9.492.1.2.2.1.7
cefAdjForwardingInfo .1.3.6.1.4.1.9.9.492.1.2.2.1.8
cefAdjPkts .1.3.6.1.4.1.9.9.492.1.2.2.1.9
cefFE .1.3.6.1.4.1.9.9.492.1.3
cefFESelectionTable .1.3.6.1.4.1.9.9.492.1.3.1
cefFESelectionEntry .1.3.6.1.4.1.9.9.492.1.3.1.1
cefFESelectionName .1.3.6.1.4.1.9.9.492.1.3.1.1.1
cefFESelectionVrfName .1.3.6.1.4.1.9.9.492.1.3.1.1.10
cefFESelectionWeight .1.3.6.1.4.1.9.9.492.1.3.1.1.11
cefFESelectionId .1.3.6.1.4.1.9.9.492.1.3.1.1.2
cefFESelectionSpecial .1.3.6.1.4.1.9.9.492.1.3.1.1.3
cefFESelectionLabels .1.3.6.1.4.1.9.9.492.1.3.1.1.4
cefFESelectionAdjLinkType .1.3.6.1.4.1.9.9.492.1.3.1.1.5
cefFESelectionAdjInterface .1.3.6.1.4.1.9.9.492.1.3.1.1.6
cefFESelectionAdjNextHopAddrType .1.3.6.1.4.1.9.9.492.1.3.1.1.7
cefFESelectionAdjNextHopAddr .1.3.6.1.4.1.9.9.492.1.3.1.1.8
cefFESelectionAdjConnId .1.3.6.1.4.1.9.9.492.1.3.1.1.9
cefGlobal .1.3.6.1.4.1.9.9.492.1.4
cefCfgTable .1.3.6.1.4.1.9.9.492.1.4.1
cefCfgEntry .1.3.6.1.4.1.9.9.492.1.4.1.1
cefCfgAdminState .1.3.6.1.4.1.9.9.492.1.4.1.1.1
cefCfgOperState .1.3.6.1.4.1.9.9.492.1.4.1.1.2
cefCfgDistributionAdminState .1.3.6.1.4.1.9.9.492.1.4.1.1.3
cefCfgDistributionOperState .1.3.6.1.4.1.9.9.492.1.4.1.1.4
cefCfgAccountingMap .1.3.6.1.4.1.9.9.492.1.4.1.1.5
cefCfgLoadSharingAlgorithm .1.3.6.1.4.1.9.9.492.1.4.1.1.6
cefCfgLoadSharingID .1.3.6.1.4.1.9.9.492.1.4.1.1.7
cefCfgTrafficStatsLoadInterval .1.3.6.1.4.1.9.9.492.1.4.1.1.8
cefCfgTrafficStatsUpdateRate .1.3.6.1.4.1.9.9.492.1.4.1.1.9
cefResourceTable .1.3.6.1.4.1.9.9.492.1.4.2
cefResourceEntry .1.3.6.1.4.1.9.9.492.1.4.2.1
cefResourceMemoryUsed .1.3.6.1.4.1.9.9.492.1.4.2.1.1
cefResourceFailureReason .1.3.6.1.4.1.9.9.492.1.4.2.1.2
cefInterface .1.3.6.1.4.1.9.9.492.1.5
cefIntTable .1.3.6.1.4.1.9.9.492.1.5.1
cefIntEntry .1.3.6.1.4.1.9.9.492.1.5.1.1
cefIntSwitchingState .1.3.6.1.4.1.9.9.492.1.5.1.1.1
cefIntLoadSharing .1.3.6.1.4.1.9.9.492.1.5.1.1.2
cefIntNonrecursiveAccouting .1.3.6.1.4.1.9.9.492.1.5.1.1.3
cefPeer .1.3.6.1.4.1.9.9.492.1.6
cefPeerTable .1.3.6.1.4.1.9.9.492.1.6.1
cefPeerEntry .1.3.6.1.4.1.9.9.492.1.6.1.1
entPeerPhysicalIndex .1.3.6.1.4.1.9.9.492.1.6.1.1.1
cefPeerOperState .1.3.6.1.4.1.9.9.492.1.6.1.1.2
cefPeerNumberOfResets .1.3.6.1.4.1.9.9.492.1.6.1.1.3
cefPeerFIBTable .1.3.6.1.4.1.9.9.492.1.6.2
cefPeerFIBEntry .1.3.6.1.4.1.9.9.492.1.6.2.1
cefPeerFIBOperState .1.3.6.1.4.1.9.9.492.1.6.2.1.1
cefCC .1.3.6.1.4.1.9.9.492.1.7
cefCCGlobalTable .1.3.6.1.4.1.9.9.492.1.7.1
cefCCGlobalEntry .1.3.6.1.4.1.9.9.492.1.7.1.1
cefCCGlobalAutoRepairEnabled .1.3.6.1.4.1.9.9.492.1.7.1.1.1
cefCCGlobalAutoRepairDelay .1.3.6.1.4.1.9.9.492.1.7.1.1.2
cefCCGlobalAutoRepairHoldDown .1.3.6.1.4.1.9.9.492.1.7.1.1.3
cefCCGlobalErrorMsgEnabled .1.3.6.1.4.1.9.9.492.1.7.1.1.4
cefCCGlobalFullScanAction .1.3.6.1.4.1.9.9.492.1.7.1.1.5
cefCCGlobalFullScanStatus .1.3.6.1.4.1.9.9.492.1.7.1.1.6
cefCCTypeTable .1.3.6.1.4.1.9.9.492.1.7.2
cefCCTypeEntry .1.3.6.1.4.1.9.9.492.1.7.2.1
cefCCType .1.3.6.1.4.1.9.9.492.1.7.2.1.1
cefCCEnabled .1.3.6.1.4.1.9.9.492.1.7.2.1.2
cefCCCount .1.3.6.1.4.1.9.9.492.1.7.2.1.3
cefCCPeriod .1.3.6.1.4.1.9.9.492.1.7.2.1.4
cefCCQueriesSent .1.3.6.1.4.1.9.9.492.1.7.2.1.5
cefCCQueriesIgnored .1.3.6.1.4.1.9.9.492.1.7.2.1.6
cefCCQueriesChecked .1.3.6.1.4.1.9.9.492.1.7.2.1.7
cefCCQueriesIterated .1.3.6.1.4.1.9.9.492.1.7.2.1.8
cefInconsistencyRecordTable .1.3.6.1.4.1.9.9.492.1.7.3
cefInconsistencyRecordEntry .1.3.6.1.4.1.9.9.492.1.7.3.1
cefInconsistencyRecId .1.3.6.1.4.1.9.9.492.1.7.3.1.1
cefInconsistencyPrefixType .1.3.6.1.4.1.9.9.492.1.7.3.1.2
cefInconsistencyPrefixAddr .1.3.6.1.4.1.9.9.492.1.7.3.1.3
cefInconsistencyPrefixLen .1.3.6.1.4.1.9.9.492.1.7.3.1.4
cefInconsistencyVrfName .1.3.6.1.4.1.9.9.492.1.7.3.1.5
cefInconsistencyCCType .1.3.6.1.4.1.9.9.492.1.7.3.1.6
cefInconsistencyEntity .1.3.6.1.4.1.9.9.492.1.7.3.1.7
cefInconsistencyReason .1.3.6.1.4.1.9.9.492.1.7.3.1.8
entLastInconsistencyDetectTime .1.3.6.1.4.1.9.9.492.1.7.4
cefInconsistencyReset .1.3.6.1.4.1.9.9.492.1.7.5
cefInconsistencyResetStatus .1.3.6.1.4.1.9.9.492.1.7.6
cefStats .1.3.6.1.4.1.9.9.492.1.8
cefStatsPrefixLenTable .1.3.6.1.4.1.9.9.492.1.8.1
cefStatsPrefixLenEntry .1.3.6.1.4.1.9.9.492.1.8.1.1
cefStatsPrefixLen .1.3.6.1.4.1.9.9.492.1.8.1.1.1
cefStatsPrefixQueries .1.3.6.1.4.1.9.9.492.1.8.1.1.2
cefStatsPrefixHCQueries .1.3.6.1.4.1.9.9.492.1.8.1.1.3
cefStatsPrefixInserts .1.3.6.1.4.1.9.9.492.1.8.1.1.4
cefStatsPrefixHCInserts .1.3.6.1.4.1.9.9.492.1.8.1.1.5
cefStatsPrefixDeletes .1.3.6.1.4.1.9.9.492.1.8.1.1.6
cefStatsPrefixHCDeletes .1.3.6.1.4.1.9.9.492.1.8.1.1.7
cefStatsPrefixElements .1.3.6.1.4.1.9.9.492.1.8.1.1.8
cefStatsPrefixHCElements .1.3.6.1.4.1.9.9.492.1.8.1.1.9
cefSwitchingStatsTable .1.3.6.1.4.1.9.9.492.1.8.2
cefSwitchingStatsEntry .1.3.6.1.4.1.9.9.492.1.8.2.1
cefSwitchingIndex .1.3.6.1.4.1.9.9.492.1.8.2.1.1
cefSwitchingPath .1.3.6.1.4.1.9.9.492.1.8.2.1.2
cefSwitchingDrop .1.3.6.1.4.1.9.9.492.1.8.2.1.3
cefSwitchingHCDrop .1.3.6.1.4.1.9.9.492.1.8.2.1.4
cefSwitchingPunt .1.3.6.1.4.1.9.9.492.1.8.2.1.5
cefSwitchingHCPunt .1.3.6.1.4.1.9.9.492.1.8.2.1.6
cefSwitchingPunt2Host .1.3.6.1.4.1.9.9.492.1.8.2.1.7
cefSwitchingHCPunt2Host .1.3.6.1.4.1.9.9.492.1.8.2.1.8
cefNotifCntl .1.3.6.1.4.1.9.9.492.1.9
cefResourceFailureNotifEnable .1.3.6.1.4.1.9.9.492.1.9.1
cefPeerStateChangeNotifEnable .1.3.6.1.4.1.9.9.492.1.9.2
cefPeerFIBStateChangeNotifEnable .1.3.6.1.4.1.9.9.492.1.9.3
cefNotifThrottlingInterval .1.3.6.1.4.1.9.9.492.1.9.4
cefInconsistencyNotifEnable .1.3.6.1.4.1.9.9.492.1.9.5
ciscoCefMIBConform .1.3.6.1.4.1.9.9.492.2
cefMIBGroups .1.3.6.1.4.1.9.9.492.2.1
cefMIBCompliances .1.3.6.1.4.1.9.9.492.2.2