RE: snmpget and snmpwalk return corrupt string instead of hex string when MAC address starts with non zero

Randall C Grimshaw <[email protected]>
Newsgroups gmane.network.net-snmp.user
Message-ID <D1ED659D5D76664389FB55EE3E3EE506095CE8EF84@suex07-mbx-01.ad.syr.edu> 
Dave:
   Thank you again. I ran the -Dparse-mib command as you suggested. It is interesting that IP-MIB is identified as Module 28 but not parsed for ip.x.x.x  RFC1213-MIB is Module 52 and may have commandeered the association.

# /usr/local/src/net-snmp-5.5/apps/snmpwalk -Dparse-mib -c community router ip.ipNetToMediaTable.ipNetToMediaEntry.ipNetToMediaPhysAddress.index

No log handling enabled - turning on stderr logging
registered debug token parse-mib, 1
parse-mibs: Scanning directory /me/.snmp/mibs
parse-mibs: No index
parse-mibs: cannot open MIB directory /me/.snmp/mibs
parse-mibs: Scanning directory /usr/local/net-snmp/5.5/share/snmp/mibs
parse-mibs: The index is good
parse-mibs:   Module 0 HCNUM-TC is in /usr/local/net-snmp/5.5/share/snmp/mibs/HCNUM-TC.txt
parse-mibs:   Module 1 SNMPv2-SMI is in /usr/local/net-snmp/5.5/share/snmp/mibs/SNMPv2-SMI.txt
parse-mibs:   Module 2 AGENTX-MIB is in /usr/local/net-snmp/5.5/share/snmp/mibs/AGENTX-MIB.txt
parse-mibs:   Module 3 SNMPv2-TC is in /usr/local/net-snmp/5.5/share/snmp/mibs/SNMPv2-TC.txt
parse-mibs:   Module 4 HOST-RESOURCES-TYPES is in /usr/local/net-snmp/5.5/share/snmp/mibs/HOST-RESOURCES-TYPES.txt
parse-mibs:   Module 5 SNMP-NOTIFICATION-MIB is in /usr/local/net-snmp/5.5/share/snmp/mibs/SNMP-NOTIFICATION-MIB.txt
parse-mibs:   Module 6 NOTIFICATION-LOG-MIB is in /usr/local/net-snmp/5.5/share/snmp/mibs/NOTIFICATION-LOG-MIB.txt
parse-mibs:   Module 7 TCP-MIB is in /usr/local/net-snmp/5.5/share/snmp/mibs/TCP-MIB.txt
parse-mibs:   Module 8 SNMP-USER-BASED-SM-MIB is in /usr/local/net-snmp/5.5/share/snmp/mibs/SNMP-USER-BASED-SM-MIB.txt
parse-mibs:   Module 9 DISMAN-SCRIPT-MIB is in /usr/local/net-snmp/5.5/share/snmp/mibs/DISMAN-SCRIPT-MIB.txt
parse-mibs:   Module 10 RFC-1215 is in /usr/local/net-snmp/5.5/share/snmp/mibs/RFC-1215.txt
parse-mibs:   Module 11 EtherLike-MIB is in /usr/local/net-snmp/5.5/share/snmp/mibs/EtherLike-MIB.txt
parse-mibs:   Module 12 SNMP-MPD-MIB is in /usr/local/net-snmp/5.5/share/snmp/mibs/SNMP-MPD-MIB.txt
parse-mibs:   Module 13 SNMPv2-MIB is in /usr/local/net-snmp/5.5/share/snmp/mibs/SNMPv2-MIB.txt
parse-mibs:   Module 14 UCD-DLMOD-MIB is in /usr/local/net-snmp/5.5/share/snmp/mibs/UCD-DLMOD-MIB.txt
parse-mibs:   Module 15 TRANSPORT-ADDRESS-MIB is in /usr/local/net-snmp/5.5/share/snmp/mibs/TRANSPORT-ADDRESS-MIB.txt
parse-mibs:   Module 16 NET-SNMP-PASS-MIB is in /usr/local/net-snmp/5.5/share/snmp/mibs/NET-SNMP-PASS-MIB.txt
parse-mibs:   Module 17 RFC1155-SMI is in /usr/local/net-snmp/5.5/share/snmp/mibs/RFC1155-SMI.txt
parse-mibs:   Module 18 SNMP-PROXY-MIB is in /usr/local/net-snmp/5.5/share/snmp/mibs/SNMP-PROXY-MIB.txt
parse-mibs:   Module 19 SNMPv2-TM is in /usr/local/net-snmp/5.5/share/snmp/mibs/SNMPv2-TM.txt
parse-mibs:   Module 20 NET-SNMP-EXTEND-MIB is in /usr/local/net-snmp/5.5/share/snmp/mibs/NET-SNMP-EXTEND-MIB.txt
parse-mibs:   Module 21 SNMP-COMMUNITY-MIB is in /usr/local/net-snmp/5.5/share/snmp/mibs/SNMP-COMMUNITY-MIB.txt
parse-mibs:   Module 22 UCD-DEMO-MIB is in /usr/local/net-snmp/5.5/share/snmp/mibs/UCD-DEMO-MIB.txt
parse-mibs:   Module 23 HOST-RESOURCES-MIB is in /usr/local/net-snmp/5.5/share/snmp/mibs/HOST-RESOURCES-MIB.txt
parse-mibs:   Module 24 IPV6-TC is in /usr/local/net-snmp/5.5/share/snmp/mibs/IPV6-TC.txt
parse-mibs:   Module 25 SNMP-USM-DH-OBJECTS-MIB is in /usr/local/net-snmp/5.5/share/snmp/mibs/SNMP-USM-DH-OBJECTS-MIB.txt
parse-mibs:   Module 26 UCD-IPFWACC-MIB is in /usr/local/net-snmp/5.5/share/snmp/mibs/UCD-IPFWACC-MIB.txt
parse-mibs:   Module 27 IPV6-MIB is in /usr/local/net-snmp/5.5/share/snmp/mibs/IPV6-MIB.txt
parse-mibs:   Module 28 IP-MIB is in /usr/local/net-snmp/5.5/share/snmp/mibs/IP-MIB.txt
parse-mibs:   Module 29 SNMP-USM-AES-MIB is in /usr/local/net-snmp/5.5/share/snmp/mibs/SNMP-USM-AES-MIB.txt
parse-mibs:   Module 30 IANA-RTPROTO-MIB is in /usr/local/net-snmp/5.5/share/snmp/mibs/IANA-RTPROTO-MIB.txt
parse-mibs:   Module 31 UCD-SNMP-MIB is in /usr/local/net-snmp/5.5/share/snmp/mibs/UCD-SNMP-MIB.txt
parse-mibs:   Module 32 SNMPv2-CONF is in /usr/local/net-snmp/5.5/share/snmp/mibs/SNMPv2-CONF.txt
parse-mibs:   Module 33 IPV6-UDP-MIB is in /usr/local/net-snmp/5.5/share/snmp/mibs/IPV6-UDP-MIB.txt
parse-mibs:   Module 34 SMUX-MIB is in /usr/local/net-snmp/5.5/share/snmp/mibs/SMUX-MIB.txt
parse-mibs:   Module 35 SNMP-VIEW-BASED-ACM-MIB is in /usr/local/net-snmp/5.5/share/snmp/mibs/SNMP-VIEW-BASED-ACM-MIB.txt
parse-mibs:   Module 36 UCD-DISKIO-MIB is in /usr/local/net-snmp/5.5/share/snmp/mibs/UCD-DISKIO-MIB.txt
parse-mibs:   Module 37 IF-MIB is in /usr/local/net-snmp/5.5/share/snmp/mibs/IF-MIB.txt
parse-mibs:   Module 38 SNMP-FRAMEWORK-MIB is in /usr/local/net-snmp/5.5/share/snmp/mibs/SNMP-FRAMEWORK-MIB.txt
parse-mibs:   Module 39 NET-SNMP-TC is in /usr/local/net-snmp/5.5/share/snmp/mibs/NET-SNMP-TC.txt
parse-mibs:   Module 40 RMON-MIB is in /usr/local/net-snmp/5.5/share/snmp/mibs/RMON-MIB.txt
parse-mibs:   Module 41 INET-ADDRESS-MIB is in /usr/local/net-snmp/5.5/share/snmp/mibs/INET-ADDRESS-MIB.txt
parse-mibs:   Module 42 IANAifType-MIB is in /usr/local/net-snmp/5.5/share/snmp/mibs/IANAifType-MIB.txt
parse-mibs:   Module 43 IPV6-ICMP-MIB is in /usr/local/net-snmp/5.5/share/snmp/mibs/IPV6-ICMP-MIB.txt
parse-mibs:   Module 44 DISMAN-EVENT-MIB is in /usr/local/net-snmp/5.5/share/snmp/mibs/DISMAN-EVENT-MIB.txt
parse-mibs:   Module 45 NET-SNMP-AGENT-MIB is in /usr/local/net-snmp/5.5/share/snmp/mibs/NET-SNMP-AGENT-MIB.txt
parse-mibs:   Module 46 NET-SNMP-MIB is in /usr/local/net-snmp/5.5/share/snmp/mibs/NET-SNMP-MIB.txt
parse-mibs:   Module 47 IPV6-TCP-MIB is in /usr/local/net-snmp/5.5/share/snmp/mibs/IPV6-TCP-MIB.txt
parse-mibs:   Module 48 UDP-MIB is in /usr/local/net-snmp/5.5/share/snmp/mibs/UDP-MIB.txt
parse-mibs:   Module 49 IANA-ADDRESS-FAMILY-NUMBERS-MIB is in /usr/local/net-snmp/5.5/share/snmp/mibs/IANA-ADDRESS-FAMILY-NUMBERS-MIB.txt
parse-mibs:   Module 50 NET-SNMP-EXAMPLES-MIB is in /usr/local/net-snmp/5.5/share/snmp/mibs/NET-SNMP-EXAMPLES-MIB.txt
parse-mibs:   Module 51 IANA-LANGUAGE-MIB is in /usr/local/net-snmp/5.5/share/snmp/mibs/IANA-LANGUAGE-MIB.txt
parse-mibs:   Module 52 RFC1213-MIB is in /usr/local/net-snmp/5.5/share/snmp/mibs/RFC1213-MIB.txt
parse-mibs:   Module 53 SNMP-TARGET-MIB is in /usr/local/net-snmp/5.5/share/snmp/mibs/SNMP-TARGET-MIB.txt
parse-mibs:   Module 54 IP-FORWARD-MIB is in /usr/local/net-snmp/5.5/share/snmp/mibs/IP-FORWARD-MIB.txt
parse-mibs:   Module 55 DISMAN-SCHEDULE-MIB is in /usr/local/net-snmp/5.5/share/snmp/mibs/DISMAN-SCHEDULE-MIB.txt
parse-mibs:   Module 56 SCTP-MIB is in /usr/local/net-snmp/5.5/share/snmp/mibs/SCTP-MIB.txt
parse-mibs:   Module 57 IF-INVERTED-STACK-MIB is in /usr/local/net-snmp/5.5/share/snmp/mibs/IF-INVERTED-STACK-MIB.txt
parse-mibs: Parsing MIB: 13 SNMPv2-MIB
parse-mibs: Parsing MIB: 1 SNMPv2-SMI
parse-mibs: Processing IMPORTS for module 1 SNMPv2-SMI
parse-mibs:   Processing import: joint-iso-ccitt
parse-mibs:   Processing import: ccitt
parse-mibs:   Processing import: iso
parse-mibs: Parsing MIB: 3 SNMPv2-TC
parse-mibs: Processing IMPORTS for module 3 SNMPv2-TC
parse-mibs:   Processing import: joint-iso-ccitt
parse-mibs:   Processing import: ccitt
parse-mibs:   Processing import: iso
parse-mibs: #### adding Module 13 'snmpModules' 1
parse-mibs: #### adding Module 13 'mib-2' 1
parse-mibs: #### adding Module 13 'DisplayString' 3
parse-mibs: #### adding Module 13 'TestAndIncr' 3
parse-mibs: #### adding Module 13 'TimeStamp' 3
parse-mibs: Processing IMPORTS for module 13 SNMPv2-MIB
parse-mibs:   Processing import: snmpModules
parse-mibs:   Processing import: mib-2
parse-mibs:   Processing import: DisplayString
parse-mibs:   Processing import: TestAndIncr
parse-mibs:   Processing import: TimeStamp
parse-mibs: Parsing MIB: 52 RFC1213-MIB
parse-mibs: Parsing MIB: 17 RFC1155-SMI
parse-mibs: Processing IMPORTS for module 17 RFC1155-SMI
parse-mibs:   Processing import: joint-iso-ccitt
parse-mibs:   Processing import: ccitt
parse-mibs:   Processing import: iso
parse-mibs: #### adding Module 52 'mgmt' 17
parse-mibs: Processing IMPORTS for module 52 RFC1213-MIB
parse-mibs:   Processing import: mgmt
parse-mibs: Parsing MIB: 35 SNMP-VIEW-BASED-ACM-MIB
parse-mibs: Module SNMPv2-SMI already loaded
parse-mibs: Module SNMPv2-TC already loaded
parse-mibs: Parsing MIB: 38 SNMP-FRAMEWORK-MIB
parse-mibs: Module SNMPv2-SMI already loaded
parse-mibs: #### adding Module 38 'snmpModules' 1
parse-mibs: Processing IMPORTS for module 38 SNMP-FRAMEWORK-MIB
parse-mibs:   Processing import: snmpModules
parse-mibs: #### adding Module 35 'snmpModules' 1
parse-mibs: #### adding Module 35 'TestAndIncr' 3
parse-mibs: #### adding Module 35 'RowStatus' 3
parse-mibs: #### adding Module 35 'StorageType' 3
parse-mibs: #### adding Module 35 'SnmpAdminString' 38
parse-mibs: #### adding Module 35 'SnmpSecurityLevel' 38
parse-mibs: #### adding Module 35 'SnmpSecurityModel' 38
parse-mibs: Processing IMPORTS for module 35 SNMP-VIEW-BASED-ACM-MIB
parse-mibs:   Processing import: snmpModules
parse-mibs:   Processing import: TestAndIncr
parse-mibs:   Processing import: RowStatus
parse-mibs:   Processing import: StorageType
parse-mibs:   Processing import: SnmpAdminString
parse-mibs:   Processing import: SnmpSecurityLevel
parse-mibs:   Processing import: SnmpSecurityModel
parse-mibs: Parsing MIB: 21 SNMP-COMMUNITY-MIB
parse-mibs: Module SNMPv2-SMI already loaded
parse-mibs: Module SNMPv2-TC already loaded
parse-mibs: Module SNMP-FRAMEWORK-MIB already loaded
parse-mibs: Parsing MIB: 53 SNMP-TARGET-MIB
parse-mibs: Module SNMPv2-SMI already loaded
parse-mibs: Module SNMPv2-TC already loaded
parse-mibs: Module SNMP-FRAMEWORK-MIB already loaded
parse-mibs: #### adding Module 53 'snmpModules' 1
parse-mibs: #### adding Module 53 'TDomain' 3
parse-mibs: #### adding Module 53 'TAddress' 3
parse-mibs: #### adding Module 53 'TimeInterval' 3
parse-mibs: #### adding Module 53 'RowStatus' 3
parse-mibs: #### adding Module 53 'StorageType' 3
parse-mibs: #### adding Module 53 'TestAndIncr' 3
parse-mibs: #### adding Module 53 'SnmpSecurityModel' 38
parse-mibs: #### adding Module 53 'SnmpMessageProcessingModel' 38
parse-mibs: #### adding Module 53 'SnmpSecurityLevel' 38
parse-mibs: #### adding Module 53 'SnmpAdminString' 38
parse-mibs: Processing IMPORTS for module 53 SNMP-TARGET-MIB
parse-mibs:   Processing import: snmpModules
parse-mibs:   Processing import: TDomain
parse-mibs:   Processing import: TAddress
parse-mibs:   Processing import: TimeInterval
parse-mibs:   Processing import: RowStatus
parse-mibs:   Processing import: StorageType
parse-mibs:   Processing import: TestAndIncr
parse-mibs:   Processing import: SnmpSecurityModel
parse-mibs:   Processing import: SnmpMessageProcessingModel
parse-mibs:   Processing import: SnmpSecurityLevel
parse-mibs:   Processing import: SnmpAdminString
parse-mibs: #### adding Module 21 'snmpModules' 1
parse-mibs: #### adding Module 21 'RowStatus' 3
parse-mibs: #### adding Module 21 'StorageType' 3
parse-mibs: #### adding Module 21 'SnmpAdminString' 38
parse-mibs: #### adding Module 21 'SnmpEngineID' 38
parse-mibs: #### adding Module 21 'SnmpTagValue' 53
parse-mibs: #### adding Module 21 'snmpTargetAddrEntry' 53
parse-mibs: Processing IMPORTS for module 21 SNMP-COMMUNITY-MIB
parse-mibs:   Processing import: snmpModules
parse-mibs:   Processing import: RowStatus
parse-mibs:   Processing import: StorageType
parse-mibs:   Processing import: SnmpAdminString
parse-mibs:   Processing import: SnmpEngineID
parse-mibs:   Processing import: SnmpTagValue
parse-mibs:   Processing import: snmpTargetAddrEntry
RFC1213-MIB::ipNetToMediaPhysAddress.443.128.230.x.7 = Hex-STRING: 00 A0 A3 AB A0 00 
RFC1213-MIB::ipNetToMediaPhysAddress.443.128.230.x.8 = STRING: "¸¬o(LÉ"
RFC1213-MIB::ipNetToMediaPhysAddress.443.128.230.x.9 = Hex-STRING: 00 BA B0 B1 B8 BB

-----Original Message-----
From: [email protected] [mailto:[email protected]] On Behalf Of Dave Shield
Sent: Thursday, July 15, 2010 3:16 AM
To: Randall C Grimshaw
Cc: Fulko Hew; [email protected]
Subject: Re: snmpget and snmpwalk return corrupt string instead of hex string when MAC address starts with non zero

On 14 July 2010 21:44, Randall C Grimshaw <[email protected]> wrote:
> When I add
>>       PhysAddress
>>             FROM SNMPv2-TC
> To the IMPORTS list in the RFC1213-MIB.txt file - it works..

[shudder]


> Is this safe to adopt in production?

Pragmatically - if it works for you, then fine.
But it's a gross hack, mixing SMIv1 and SMIv2 definitions.
The Net-SNMP tools are relatively easy-going, and won't
mind about this, but it may well break more strict applications.


> I wonder if this is related to my compiling with --enable-old-features

Very unlikely.


If you want to solve this properly, I'd start by removing the RFC1213 MIB
file again, and then running the command with the option -Dparse-mib
This will print out debugging information about the loading and parsing
of MIB files.  That might give some indication about why the IP-MIB
file isn't being read.


Dave

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