Edit (Add/Remove/Modify) ARP Tables

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Introduction

This is a tool to display and modify IP-to-Physical address translation tables used by ARP (Address Resolution Protocol), like the Windows command-line arp.exe. This tool will do two things: it displays ARP table entries and it adds/modifies/removes ARP entries. These are done by requesting the SNMP (Simple Network Management Protocol) extension library.

Access IP and MAC addresses through SNMP

You can read and modify ARP tables through SNMP, by requesting SNMP to get/set object information. SNMP requests and responses through MIB (Management Information Base). MIB is like a tree, and has all the manageable objects we will use. For more information, check the RFC1213. Also check the files at %SystemRoot%\system32\*.mib. The file that has entries we will use is %SystemRoot%\system32\mib_ii.mib. You can open and see it using Notepad.

Here is an MIB ipNetToMediaEntry entry:

ipNetToMediaEntry OBJECT-TYPE
              SYNTAX  IpNetToMediaEntry
              ACCESS  not-accessible
              STATUS  mandatory
              DESCRIPTION
                      "Each entry contains one IpAddress to 'physical'
                      address equivalence."
              INDEX   { ipNetToMediaIfIndex,
                        ipNetToMediaNetAddress }
              ::= { ipNetToMediaTable 1 }

MIB accesses objects by the OID (Object Identifier) number. Every object has a number, and child objects have the both parent object number and their own number. The numbers are separated by a dot ".". For example, if the parent object has the number "1" and the child object has the number "3", then the child object OID number will be "1.3", and a child of the child may be "1.3.6", … "1.3.6.1.2.1", and so on.

Here is a simple sketch of the objects tree:

Initialize the class

I used the function SnmpExtensionQuery to resolve the SNMP requests, but before using it, you must call the SnmpExtensionInit function to initialize the SNMP extension agent DLL. The two functions exist in the Microsoft library inetmib1.dll, so at the class construction, I load this library and get the addresses of these functions, and then call SnmpExtensionInit to initialize the SNMP extension agent DLL.

Here is the construction of the CARP class:

//////////////////////////////////////////////////////////////////////
// Construction/Destruction
//////////////////////////////////////////////////////////////////////

CARP::CARP()
{
    // Load dynamic library: inetmib1.dll
    hMIBLibrary    = LoadLibrary(TEXT("inetmib1.dll"));

    // If library loaded, get addresses of (SnmpExtensionInit,
    // pfnSnmpExtensionQuery) functions
    if (hMIBLibrary)
    {
        pfnSnmpExtensionInit    = (PFNSNMPEXTENSIONINIT)  GetProcAddress(hMIBLibrary, 
                                   "SnmpExtensionInit");
        pfnSnmpExtensionQuery   = (PFNSNMPEXTENSIONQUERY) GetProcAddress(hMIBLibrary, 
                                   "SnmpExtensionQuery");

        // If success get addresses and initialize SNMP, bInitialized = true
        if (pfnSnmpExtensionInit && pfnSnmpExtensionQuery)
        {
            HANDLE              hPollForTrapEvent;
            AsnObjectIdentifier aoiSupportedView;

            bInitialized        = pfnSnmpExtensionInit(0, &hPollForTrapEvent, 
                                                       &aoiSupportedView);
        }
    }
    else
    {
        // If fail to get addresses, bInitialized = false
        bInitialized            = FALSE;
        AfxMessageBox(_T("Load library fail"));
    }
}

Get ARP entries

The function GetEntries gets the ARP entries like arp.exe -a. It takes three parameters: pTable, the pointer to an array of arpTable structs that will be filled by the IP and MAC addresses; TableLength, the length of the array; AdapterIndex, the NIC adapter index number. I've used three OIDs to get the ARP table entries. OID[0] = "1.3.6.1.2.1.4.22.1.1" to get the interface index of the entry and compare it with the AdapterIndex parameter; OID[1] = "1.3.6.1.2.1.4.22.1.2" to get the IP and MAC addresses; OID[2] = "1.3.6.1.2.1.4.22.1.4" to get the entry type (static or dynamic).

//-----------------------------------------------------------------------
// Function:          GetEntries: Read ARP table for specific NIC interface.
//
// Parameters:
//    pTable          Pointer to array of arpTable struct
//    TableLength     Length of the array
//    AdapterIndex    NIC Adapter index number
//
// Returns:
//                    Number of read ARP entries
//-----------------------------------------------------------------------
int CARP::GetEntries(arpTable* pTable, int TableLength, int AdapterIndex)
{
    // Be sure initialize SNMP true
    if (!bInitialized)
        return 0;

    SnmpVarBindList        SVBList[3];
    SnmpVarBind            SVBVars[3];
    UINT                   OID[3][10];
    AsnInteger32           aiErrorStatus[3], aiErrorIndex[3];
    AsnObjectIdentifier    AsnOID0 = {sizeof(OID[0])/sizeof(UINT), OID[0]};
    AsnObjectIdentifier    AsnOID1 = {sizeof(OID[1])/sizeof(UINT), OID[1]};
    AsnObjectIdentifier    AsnOID2 = {sizeof(OID[2])/sizeof(UINT), OID[2]};
    unsigned long          pIPAddress;
    unsigned long          pMACAddress;
    int                    iEntries;

    
    //-----------------------------------------------------------------------
    //    Fill array of 3 OIDs
    //    
    //    OID[0]    : "1.3.6.1.2.1.4.22.1.1", ipNetToMediaIfIndex
    //                The interface on which this entry's equivalence is effective
    //
    //    OID[1]    : "1.3.6.1.2.1.4.22.1.2", ipNetToMediaPhysAddress
    //                The media-dependent 'physical' address
    //
    //    OID[2]    : "1.3.6.1.2.1.4.22.1.4", ipNetToMediaType
    //                Entry type: 1:Other, 2:Invalid(Remove), 3:Dynamic, 4:Static
    //
    for (int count=0; count<3; count++)
    {
        OID[count][0]        = 1;
        OID[count][1]        = 3;
        OID[count][2]        = 6;
        OID[count][3]        = 1;
        OID[count][4]        = 2;
        OID[count][5]        = 1;
        OID[count][6]        = 4;
        OID[count][7]        = 22;
        OID[count][8]        = 1;

        switch(count)
        {
        case 0:
            // Adapter interface
            OID[count][9]    = 1;
            break;

        case 1:
            // MAC address
            OID[count][9]    = 2;
            break;

        case 2:
            // Entry Type
            OID[count][9]    = 4;
            break;
        }
    }

    ZeroMemory(pTable, sizeof(arpTable)*TableLength);

    SVBList[0].len  = 1;
    SVBList[0].list = &SVBVars[0];
    SnmpUtilOidCpy(&SVBVars[0].name, &AsnOID0);

    SVBList[1].len  = 1;
    SVBList[1].list = &SVBVars[1];
    SnmpUtilOidCpy(&SVBVars[1].name, &AsnOID1);

    SVBList[2].len  = 1;
    SVBList[2].list = &SVBVars[2];
    SnmpUtilOidCpy(&SVBVars[2].name, &AsnOID2);

    iEntries        = 0;
    do
    {
        aiErrorStatus[0]    = 0;
        aiErrorIndex[0]     = 0;
        aiErrorStatus[1]    = 0;
        aiErrorIndex[1]     = 0;
        aiErrorStatus[2]    = 0;
        aiErrorIndex[2]     = 0;

        // Query information of 3 OIDs
        if (pfnSnmpExtensionQuery(SNMP_PDU_GETNEXT, &SVBList[0], 
                                  &aiErrorStatus[0], &aiErrorIndex[0]))
            if (pfnSnmpExtensionQuery(SNMP_PDU_GETNEXT, &SVBList[1], 
                                      &aiErrorStatus[1], &aiErrorIndex[1]))
                if (pfnSnmpExtensionQuery(SNMP_PDU_GETNEXT, &SVBList[2], 
                                          &aiErrorStatus[2], &aiErrorIndex[2]))
                    if (aiErrorStatus[0] == SNMP_ERRORSTATUS_NOERROR &&
                        aiErrorStatus[1] == SNMP_ERRORSTATUS_NOERROR &&
                        aiErrorStatus[2] == SNMP_ERRORSTATUS_NOERROR)
                        // Check for error
                    {
                        //----------------------------------------------------------
                        // From MSDN Help:
                        //   http://msdn2.microsoft.com/en-us/library/aa378021.aspx
                        // 
                        // If the extension agent cannot resolve
                        // the variable bindings on a Get Next request, 
                        // it must change the name field of the SnmpVarBind
                        // structure to the value of the object 
                        // identifier immediately following that
                        // of the currently supported MIB subtree view. 
                        // For example, if the extension agent supports
                        // view ".1.3.6.1.4.1.77.1", a Get Next 
                        // request on ".1.3.6.1.4.1.77.1.5.1"
                        // would result in a modified name
                        // field of ".1.3.6.1.4.1.77.2". 
                        // This signals the SNMP service to continue
                        // the attempt to resolve the variable
                        // bindings with other extension agents
                        //----------------------------------------------------------

                        if(SnmpUtilOidNCmp(&SVBVars[0].name, 
                                &AsnOID0, AsnOID0.idLength)) 
                            break;
                        if(SnmpUtilOidNCmp(&SVBVars[1].name, 
                                &AsnOID1, AsnOID1.idLength)) 
                            break;
                        if(SnmpUtilOidNCmp(&SVBVars[2].name, 
                                &AsnOID2, AsnOID2.idLength)) 
                            break;

                        // Verify selected Adapter interface
                        if (AdapterIndex == SVBList[0].list->value.asnValue.number)
                        {
                            // pIPAddress get pointer ro IP Address
                            pIPAddress        = (unsigned long)SVBList[1].list->name.ids;
                            pTable[iEntries].IPAddress[0] = 
                                   *(unsigned char *)(pIPAddress + 44);
                            pTable[iEntries].IPAddress[1] = 
                                   *(unsigned char *)(pIPAddress + 48);
                            pTable[iEntries].IPAddress[2] = 
                                   *(unsigned char *)(pIPAddress + 52);
                            pTable[iEntries].IPAddress[3] = 
                                   *(unsigned char *)(pIPAddress + 56);

                            // pIPAddress get pointer ro MAC Address
                            pMACAddress        = 
                              (unsigned long)SVBList[1].list->value.asnValue.string.stream;
                            if (pMACAddress)
                            {
                                pTable[iEntries].MACAddress[0] = 
                                       *(unsigned char *)(pMACAddress + 0);
                                pTable[iEntries].MACAddress[1] = 
                                       *(unsigned char *)(pMACAddress + 1);
                                pTable[iEntries].MACAddress[2] = 
                                       *(unsigned char *)(pMACAddress + 2);
                                pTable[iEntries].MACAddress[3] = 
                                       *(unsigned char *)(pMACAddress + 3);
                                pTable[iEntries].MACAddress[4] = 
                                       *(unsigned char *)(pMACAddress + 4);
                                pTable[iEntries].MACAddress[5] = 
                                       *(unsigned char *)(pMACAddress + 5);
                            }

                            // Entry Type
                            pTable[iEntries].Type    = 
                             (unsigned long)SVBList[2].list->value.asnValue.number;

                            // Type must be one of (1, 2, 3, 4)
                            if (pTable[iEntries].Type>=1 && pTable[iEntries].Type<=4)
                                iEntries++;        // Move to next array position
                        }
                    }
                    else
                        break;    // If error exit do-while
    }
    while(iEntries < TableLength);

    // Frees the memory allocated for the specified object identifiers
    SnmpUtilOidFree(&SVBVars[2].name);
    SnmpUtilOidFree(&SVBVars[1].name);
    SnmpUtilOidFree(&SVBVars[0].name);

    return iEntries;    // Return number of Entries
}

Edit ARP entries

The function EditEntry adds/modifies/removes ARP entries. It adds dynamic entries like arp.exe 1.2.3.4 11-22-33-44-55-66, static entries like arp.exe –s 1.2.3.4 11-22-33-44-55-66, or removes entry like arp.exe –d 1.2.3.4. When you add a new entry, if the entry IP address does not exist in the ARP table, the entry will be added to the table. Else, if the entry IP address already exists in the ARP table, the entry will be updated. To remove an entry, you need only the IP address to identify the entry on the NIC interface. The MAC address is not needed in the remove operation. The function takes four parameters: the IPAddress array of 4 BYTEs, 4 octs of IP Address, MACAddress array of 4 BYTEs, 6 octs of the MAC Address Type Entry type (2:Remove, 3:Dynamic, 4:Static) AdapterIndex - NIC Adapter index number. I've used four OIDs to set the ARP table entries: OID[0] = "1.3.6.1.2.1.4.22.1.1", to set the interface index of the entry OID[1] = "1.3.6.1.2.1.4.22.1.2", to set MAC address OID[3] = "1.3.6.1.2.1.4.22.1.3", to set IP address OID[2] = "1.3.6.1.2.1.4.22.1.4", to set the entry type (Static or Dynamic), or Remove entry.

//-----------------------------------------------------------------------
// Function:    EditEntry: Add/Modify/Remove ARP entry for specific NIC interface.
//
// Parameters:
//    IPAddress       Array of 4 BYTES, 4 octs of IP Address
//    MACAddress      Array of 4 BYTES, 6 octs of MAC Address
//    Type            Entry type (2:Remove, 3:Dynamic, 4:Static)
//    AdapterIndex    NIC Adapter index number
//
// Returns:
//                    TRUE if set successfully, FALSE otherwise.
//-----------------------------------------------------------------------
BOOL CARP::EditEntry(unsigned char IPAddress[4], unsigned char MACAddress[6], 
                     unsigned long Type, int AdapterIndex)
{
    if (!bInitialized)
        return 0;

    SnmpVarBindList     SVBList;
    SnmpVarBind         SVBVars[4];
    UINT                OID[4][10];
    AsnInteger32        aiErrorStatus, aiErrorIndex;
    BOOL                bReturn    = FALSE;

    //-----------------------------------------------------------------------
    //    Fill array of 4 OIDs
    //    
    //    OID[0]    : "1.3.6.1.2.1.4.22.1.1", ipNetToMediaIfIndex
    //                The interface on which this entry's equivalence is effective
    //
    //    OID[1]    : "1.3.6.1.2.1.4.22.1.2", ipNetToMediaPhysAddress
    //                The media-dependent 'physical' address
    //
    //    OID[2]    : "1.3.6.1.2.1.4.22.1.3", ipNetToMediaNetAddress
    //                The IpAddress corresponding to the media-dependent 'physical' address
    //
    //    OID[3]    : "1.3.6.1.2.1.4.22.1.4", ipNetToMediaType
    //                Entry type: 1:Other, 2:Invalid(Remove), 3:Dynamic, 4:Static
    //-----------------------------------------------------------------------
    for (int count=0; count<4; count++)
    {
        OID[count][0]        = 1;
        OID[count][1]        = 3;
        OID[count][2]        = 6;
        OID[count][3]        = 1;
        OID[count][4]        = 2;
        OID[count][5]        = 1;
        OID[count][6]        = 4;
        OID[count][7]        = 22;
        OID[count][8]        = 1;
        OID[count][9]        = 1 + count;

        switch(count)
        {
        case 0:
            //    OID[0]    : "1.3.6.1.2.1.4.22.1.1", ipNetToMediaIfIndex
            //                The interface on which this entry's equivalence is effective
            SVBVars[count].value.asnType                = ASN_INTEGER;
            SVBVars[count].value.asnValue.number        = AdapterIndex;
            break;

        case 1:
            //    OID[1]    : "1.3.6.1.2.1.4.22.1.2", ipNetToMediaPhysAddress
            //                The media-dependent 'physical' address
            SVBVars[count].value.asnType                = ASN_OCTETSTRING;
            SVBVars[count].value.asnValue.string.stream = MACAddress;
            SVBVars[count].value.asnValue.string.length = 6;    // MAC Address length
            SVBVars[count].value.asnValue.string.dynamic= FALSE;
            break;

        case 2:
            //    OID[2]    : "1.3.6.1.2.1.4.22.1.3", ipNetToMediaNetAddress
            //                The IpAddress corresponding
            //                to the media-dependent 'physical' address
            SVBVars[count].value.asnType                = ASN_IPADDRESS;
            SVBVars[count].value.asnValue.string.stream = IPAddress;
            SVBVars[count].value.asnValue.string.length = 4;    // IP Address length
            SVBVars[count].value.asnValue.string.dynamic= FALSE;
            break;

        case 3:
            //    OID[3]    : "1.3.6.1.2.1.4.22.1.4", ipNetToMediaType
            //                Entry type: 2:Remove, 3:Dynamic, 4:Static
            SVBVars[count].value.asnType                = ASN_INTEGER;
            SVBVars[count].value.asnValue.number        = Type;
            break;
        }
        AsnObjectIdentifier    AsnOID = {sizeof(OID[count])/sizeof(UINT), OID[count]};
        SnmpUtilOidCpy(&SVBVars[count].name, &AsnOID);
    }

    SVBList.len     = 4;
    SVBList.list    = SVBVars;

    aiErrorStatus   = 0;
    aiErrorIndex    = 0;

    // Set information of entry (4 OIDs)
    if (pfnSnmpExtensionQuery(SNMP_PDU_SET, &SVBList, &aiErrorStatus, &aiErrorIndex))
        if (aiErrorStatus == SNMP_ERRORSTATUS_NOERROR)
            bReturn = TRUE; // If success set bReturn = true

    // Frees the memory allocated for the specified object identifiers
    SnmpUtilOidFree(&SVBVars[3].name);
    SnmpUtilOidFree(&SVBVars[2].name);
    SnmpUtilOidFree(&SVBVars[1].name);
    SnmpUtilOidFree(&SVBVars[0].name);

    return bReturn;        // TRUE if set successfully, FALSE otherwise.
}

Also, you can use the same way with suitable OIDs to add/modify/remove route table information, see some of the RFC1213 identifiers:

mib-2                   node         1.3.6.1.2.1
system                  node         1.3.6.1.2.1.1
sysDescr                scalar       1.3.6.1.2.1.1.1
sysObjectID             scalar       1.3.6.1.2.1.1.2
sysUpTime               scalar       1.3.6.1.2.1.1.3
sysContact              scalar       1.3.6.1.2.1.1.4
sysName                 scalar       1.3.6.1.2.1.1.5
sysLocation             scalar       1.3.6.1.2.1.1.6
sysServices             scalar       1.3.6.1.2.1.1.7
interfaces              node         1.3.6.1.2.1.2
ifNumber                scalar       1.3.6.1.2.1.2.1
ifTable                 table        1.3.6.1.2.1.2.2
ifEntry                 row          1.3.6.1.2.1.2.2.1
ifIndex                 column       1.3.6.1.2.1.2.2.1.1
ifDescr                 column       1.3.6.1.2.1.2.2.1.2
ifType                  column       1.3.6.1.2.1.2.2.1.3
ifMtu                   column       1.3.6.1.2.1.2.2.1.4
ifSpeed                 column       1.3.6.1.2.1.2.2.1.5
ifPhysAddress           column       1.3.6.1.2.1.2.2.1.6
ifAdminStatus           column       1.3.6.1.2.1.2.2.1.7
ifOperStatus            column       1.3.6.1.2.1.2.2.1.8
ifLastChange            column       1.3.6.1.2.1.2.2.1.9
ifInOctets              column       1.3.6.1.2.1.2.2.1.10
ifInUcastPkts           column       1.3.6.1.2.1.2.2.1.11
ifInNUcastPkts          column       1.3.6.1.2.1.2.2.1.12
ifInDiscards            column       1.3.6.1.2.1.2.2.1.13
ifInErrors              column       1.3.6.1.2.1.2.2.1.14
ifInUnknownProtos       column       1.3.6.1.2.1.2.2.1.15
ifOutOctets             column       1.3.6.1.2.1.2.2.1.16
ifOutUcastPkts          column       1.3.6.1.2.1.2.2.1.17
ifOutNUcastPkts         column       1.3.6.1.2.1.2.2.1.18
ifOutDiscards           column       1.3.6.1.2.1.2.2.1.19
ifOutErrors             column       1.3.6.1.2.1.2.2.1.20
ifOutQLen               column       1.3.6.1.2.1.2.2.1.21
ifSpecific              column       1.3.6.1.2.1.2.2.1.22
at                      node         1.3.6.1.2.1.3
atTable                 table        1.3.6.1.2.1.3.1
atEntry                 row          1.3.6.1.2.1.3.1.1
atIfIndex               column       1.3.6.1.2.1.3.1.1.1
atPhysAddress           column       1.3.6.1.2.1.3.1.1.2
atNetAddress            column       1.3.6.1.2.1.3.1.1.3
ip                      node         1.3.6.1.2.1.4
ipForwarding            scalar       1.3.6.1.2.1.4.1
ipDefaultTTL            scalar       1.3.6.1.2.1.4.2
ipInReceives            scalar       1.3.6.1.2.1.4.3
ipInHdrErrors           scalar       1.3.6.1.2.1.4.4
ipInAddrErrors          scalar       1.3.6.1.2.1.4.5
ipForwDatagrams         scalar       1.3.6.1.2.1.4.6
ipInUnknownProtos       scalar       1.3.6.1.2.1.4.7
ipInDiscards            scalar       1.3.6.1.2.1.4.8
ipInDelivers            scalar       1.3.6.1.2.1.4.9
ipOutRequests           scalar       1.3.6.1.2.1.4.10
ipOutDiscards           scalar       1.3.6.1.2.1.4.11
ipOutNoRoutes           scalar       1.3.6.1.2.1.4.12
ipReasmTimeout          scalar       1.3.6.1.2.1.4.13
ipReasmReqds            scalar       1.3.6.1.2.1.4.14
ipReasmOKs              scalar       1.3.6.1.2.1.4.15
ipReasmFails            scalar       1.3.6.1.2.1.4.16
ipFragOKs               scalar       1.3.6.1.2.1.4.17
ipFragFails             scalar       1.3.6.1.2.1.4.18
ipFragCreates           scalar       1.3.6.1.2.1.4.19
ipAddrTable             table        1.3.6.1.2.1.4.20
ipAddrEntry             row          1.3.6.1.2.1.4.20.1
ipAdEntAddr             column       1.3.6.1.2.1.4.20.1.1
ipAdEntIfIndex          column       1.3.6.1.2.1.4.20.1.2
ipAdEntNetMask          column       1.3.6.1.2.1.4.20.1.3
ipAdEntBcastAddr        column       1.3.6.1.2.1.4.20.1.4
ipAdEntReasmMaxSize     column       1.3.6.1.2.1.4.20.1.5
ipRouteTable            table        1.3.6.1.2.1.4.21
ipRouteEntry            row          1.3.6.1.2.1.4.21.1
ipRouteDest             column       1.3.6.1.2.1.4.21.1.1
ipRouteIfIndex          column       1.3.6.1.2.1.4.21.1.2
ipRouteMetric1          column       1.3.6.1.2.1.4.21.1.3
ipRouteMetric2          column       1.3.6.1.2.1.4.21.1.4
ipRouteMetric3          column       1.3.6.1.2.1.4.21.1.5
ipRouteMetric4          column       1.3.6.1.2.1.4.21.1.6
ipRouteNextHop          column       1.3.6.1.2.1.4.21.1.7
ipRouteType             column       1.3.6.1.2.1.4.21.1.8
ipRouteProto            column       1.3.6.1.2.1.4.21.1.9
ipRouteAge              column       1.3.6.1.2.1.4.21.1.10
ipRouteMask             column       1.3.6.1.2.1.4.21.1.11
ipRouteMetric5          column       1.3.6.1.2.1.4.21.1.12
ipRouteInfo             column       1.3.6.1.2.1.4.21.1.13
ipNetToMediaTable       table        1.3.6.1.2.1.4.22
ipNetToMediaEntry       row          1.3.6.1.2.1.4.22.1
ipNetToMediaIfIndex     column       1.3.6.1.2.1.4.22.1.1
ipNetToMediaPhysAddress column       1.3.6.1.2.1.4.22.1.2
ipNetToMediaNetAddress  column       1.3.6.1.2.1.4.22.1.3
ipNetToMediaType        column       1.3.6.1.2.1.4.22.1.4
ipRoutingDiscards       scalar       1.3.6.1.2.1.4.23
icmp                    node         1.3.6.1.2.1.5
icmpInMsgs              scalar       1.3.6.1.2.1.5.1
icmpInErrors            scalar       1.3.6.1.2.1.5.2
icmpInDestUnreachs      scalar       1.3.6.1.2.1.5.3
icmpInTimeExcds         scalar       1.3.6.1.2.1.5.4
icmpInParmProbs         scalar       1.3.6.1.2.1.5.5
icmpInSrcQuenchs        scalar       1.3.6.1.2.1.5.6
icmpInRedirects         scalar       1.3.6.1.2.1.5.7
icmpInEchos             scalar       1.3.6.1.2.1.5.8
icmpInEchoReps          scalar       1.3.6.1.2.1.5.9
icmpInTimestamps        scalar       1.3.6.1.2.1.5.10
icmpInTimestampReps     scalar       1.3.6.1.2.1.5.11
icmpInAddrMasks         scalar       1.3.6.1.2.1.5.12
icmpInAddrMaskReps      scalar       1.3.6.1.2.1.5.13
icmpOutMsgs             scalar       1.3.6.1.2.1.5.14
icmpOutErrors           scalar       1.3.6.1.2.1.5.15
icmpOutDestUnreachs     scalar       1.3.6.1.2.1.5.16
icmpOutTimeExcds        scalar       1.3.6.1.2.1.5.17
icmpOutParmProbs        scalar       1.3.6.1.2.1.5.18
icmpOutSrcQuenchs       scalar       1.3.6.1.2.1.5.19
icmpOutRedirects        scalar       1.3.6.1.2.1.5.20
icmpOutEchos            scalar       1.3.6.1.2.1.5.21
icmpOutEchoReps         scalar       1.3.6.1.2.1.5.22
icmpOutTimestamps       scalar       1.3.6.1.2.1.5.23
icmpOutTimestampReps    scalar       1.3.6.1.2.1.5.24
icmpOutAddrMasks        scalar       1.3.6.1.2.1.5.25
icmpOutAddrMaskReps     scalar       1.3.6.1.2.1.5.26
tcp                     node         1.3.6.1.2.1.6
tcpRtoAlgorithm         scalar       1.3.6.1.2.1.6.1
tcpRtoMin               scalar       1.3.6.1.2.1.6.2
tcpRtoMax               scalar       1.3.6.1.2.1.6.3
tcpMaxConn              scalar       1.3.6.1.2.1.6.4
tcpActiveOpens          scalar       1.3.6.1.2.1.6.5
tcpPassiveOpens         scalar       1.3.6.1.2.1.6.6
tcpAttemptFails         scalar       1.3.6.1.2.1.6.7
tcpEstabResets          scalar       1.3.6.1.2.1.6.8
tcpCurrEstab            scalar       1.3.6.1.2.1.6.9
tcpInSegs               scalar       1.3.6.1.2.1.6.10
tcpOutSegs              scalar       1.3.6.1.2.1.6.11
tcpRetransSegs          scalar       1.3.6.1.2.1.6.12
tcpConnTable            table        1.3.6.1.2.1.6.13
tcpConnEntry            row          1.3.6.1.2.1.6.13.1
tcpConnState            column       1.3.6.1.2.1.6.13.1.1
tcpConnLocalAddress     column       1.3.6.1.2.1.6.13.1.2
tcpConnLocalPort        column       1.3.6.1.2.1.6.13.1.3
tcpConnRemAddress       column       1.3.6.1.2.1.6.13.1.4
tcpConnRemPort          column       1.3.6.1.2.1.6.13.1.5
tcpInErrs               scalar       1.3.6.1.2.1.6.14
tcpOutRsts              scalar       1.3.6.1.2.1.6.15
udp                     node         1.3.6.1.2.1.7
udpInDatagrams          scalar       1.3.6.1.2.1.7.1
udpNoPorts              scalar       1.3.6.1.2.1.7.2
udpInErrors             scalar       1.3.6.1.2.1.7.3
udpOutDatagrams         scalar       1.3.6.1.2.1.7.4
udpTable                table        1.3.6.1.2.1.7.5
udpEntry                row          1.3.6.1.2.1.7.5.1
udpLocalAddress         column       1.3.6.1.2.1.7.5.1.1
udpLocalPort            column       1.3.6.1.2.1.7.5.1.2
egp                     node         1.3.6.1.2.1.8
egpInMsgs               scalar       1.3.6.1.2.1.8.1
egpInErrors             scalar       1.3.6.1.2.1.8.2
egpOutMsgs              scalar       1.3.6.1.2.1.8.3
egpOutErrors            scalar       1.3.6.1.2.1.8.4
egpNeighTable           table        1.3.6.1.2.1.8.5
egpNeighEntry           row          1.3.6.1.2.1.8.5.1
egpNeighState           column       1.3.6.1.2.1.8.5.1.1
egpNeighAddr            column       1.3.6.1.2.1.8.5.1.2
egpNeighAs              column       1.3.6.1.2.1.8.5.1.3
egpNeighInMsgs          column       1.3.6.1.2.1.8.5.1.4
egpNeighInErrs          column       1.3.6.1.2.1.8.5.1.5
egpNeighOutMsgs         column       1.3.6.1.2.1.8.5.1.6
egpNeighOutErrs         column       1.3.6.1.2.1.8.5.1.7
egpNeighInErrMsgs       column       1.3.6.1.2.1.8.5.1.8
egpNeighOutErrMsgs      column       1.3.6.1.2.1.8.5.1.9
egpNeighStateUps        column       1.3.6.1.2.1.8.5.1.10
egpNeighStateDowns      column       1.3.6.1.2.1.8.5.1.11
egpNeighIntervalHello   column       1.3.6.1.2.1.8.5.1.12
egpNeighIntervalPoll    column       1.3.6.1.2.1.8.5.1.13
egpNeighMode            column       1.3.6.1.2.1.8.5.1.14
egpNeighEventTrigger    column       1.3.6.1.2.1.8.5.1.15
egpAs                   scalar       1.3.6.1.2.1.8.6
transmission            node         1.3.6.1.2.1.10
snmp                    node         1.3.6.1.2.1.11
snmpInPkts              scalar       1.3.6.1.2.1.11.1
snmpOutPkts             scalar       1.3.6.1.2.1.11.2
snmpInBadVersions       scalar       1.3.6.1.2.1.11.3
snmpInBadCommunityNames scalar       1.3.6.1.2.1.11.4
snmpInBadCommunityUses  scalar       1.3.6.1.2.1.11.5
snmpInASNParseErrs      scalar       1.3.6.1.2.1.11.6
snmpInTooBigs           scalar       1.3.6.1.2.1.11.8
snmpInNoSuchNames       scalar       1.3.6.1.2.1.11.9
snmpInBadValues         scalar       1.3.6.1.2.1.11.10
snmpInReadOnlys         scalar       1.3.6.1.2.1.11.11
snmpInGenErrs           scalar       1.3.6.1.2.1.11.12
snmpInTotalReqVars      scalar       1.3.6.1.2.1.11.13
snmpInTotalSetVars      scalar       1.3.6.1.2.1.11.14
snmpInGetRequests       scalar       1.3.6.1.2.1.11.15
snmpInGetNexts          scalar       1.3.6.1.2.1.11.16
snmpInSetRequests       scalar       1.3.6.1.2.1.11.17
snmpInGetResponses      scalar       1.3.6.1.2.1.11.18
snmpInTraps             scalar       1.3.6.1.2.1.11.19
snmpOutTooBigs          scalar       1.3.6.1.2.1.11.20
snmpOutNoSuchNames      scalar       1.3.6.1.2.1.11.21
snmpOutBadValues        scalar       1.3.6.1.2.1.11.22
snmpOutGenErrs          scalar       1.3.6.1.2.1.11.24
snmpOutGetRequests      scalar       1.3.6.1.2.1.11.25
snmpOutGetNexts         scalar       1.3.6.1.2.1.11.26
snmpOutSetRequests      scalar       1.3.6.1.2.1.11.27
snmpOutGetResponses     scalar       1.3.6.1.2.1.11.28
snmpOutTraps            scalar       1.3.6.1.2.1.11.29
snmpEnableAuthenTraps   scalar       1.3.6.1.2.1.11.30