ifDescr output as HEX??

[guerra6880]

I am having an interesting problem with a Win32 Servers and querying for the interface Description. In the Device page I get the following when issuing a verbose query.


+ Located input field 'ifDescr' [walk]
+ Executing SNMP walk for data @ '.1.3.6.1.2.1.2.2.1.2'
+ Found item [ifDescr='HEX-00:4D:53:20:54:43:50:20:4C:6F:6F:70:62:61:63:6B:20'] index: 1 [from value]
+ Found item [ifDescr='69:6E:74:65:72:66:61:63:65:00'] index: 69 6E 74 65 72 66 61 63 65 00 [from value]
+ Found item [ifDescr='HEX-00:49:6E:74:65:6C:28:52:29:20:50:52:4F:2F:31:30:30'] index: 16777219 [from value]
+ Found item [ifDescr='30:20:58:54:20:4E:65:74:77:6F:72:6B:20:43:6F:6E'] index: 30 20 58 54 20 4E 65 74 77 6F 72 6B 20 43 6F 6E [from value]
+ Found item [ifDescr='6E:65:63:74:69:6F:6E:00'] index: 6E 65 63 74 69 6F 6E 00 [from value]


But I get the following if issuing the same snmpwalk manually from a command line

snmpwalk -c <community> -v 1 <servername> .1.3.6.1.2.1.2.2.1.2
IF-MIB::ifDescr.1 = STRING: MS TCP Loopback interface
IF-MIB::ifDescr.16777219 = STRING: Intel(R) PRO/1000 XT Network Connection

I get the same results with 0.8.6, 0.8.6a & 0.8.6b.

NET-SNMP version: 5.1.2
PHP 4.3.9 (cgi-fcgi) (built: Sep 21 2004 14:04:26)
Copyright (c) 1997-2004 The PHP Group
Zend Engine v1.3.0, Copyright (c) 1998-2004 Zend Technologies
with Zend Extension Manager v1.0.4, Copyright (c) 2003-2004, by Zend Technologies
with Zend Optimizer v2.5.5, Copyright (c) 1998-2004, by Zend Technologies

[TheWitness]

I have the same problem polling my Windows boxes only though. Don't really know. It may have something to do with the Microsoft MIB. There should be some form of workaround.

TheWitness

[raX]

Looks like the problem may be specific to the PHP-SNMP module. If you have the snmpwalk/snmpget binaries lying around (looks like you do), you can force Cacti to use them. First make sure both paths are specified under Settings -> Paths. Then open up include/config.php and change line 40 from:

Code: Select all

$config["php_snmp_support"] = function_exists("snmpget");

to:

Code: Select all

$config["php_snmp_support"] = false;

-Ian

[TheWitness]

The problem existed in PHP 5.0.1 and is corrected in PHP 5.0.2. I also believe that it may have been in existance with PHP 4.3.9. Not too sure since I have not tested that version. However, after I upgraded to PHP 5.0.2, the problem went away.

I am still seeing the problem with SNMP v2 however.

TheWitness

[TheWitness]

Ok,

Don't say that I'm an idiot, this is after all a part time job. However, what I have discovered is that the Hex information is caused by either net-snmp or php not properly loading the MIB's associated with the particular OID. Without the help of the definitions in the MIBS, in some cases, it interprets the string data as hex.

There was a user post that recommended a fix to speed up polling, which if implemented, will cause this issue. Also, you need to verify that both net-snmp and php know the verification of the MIBS.

I have sent an e-mail to raX for comment. Hopefully we can get the best of both worlds (speed and accuracy).

http://forums.cacti.net/viewtopic.php?t=4737

TheWitness