Menu
▾
▴
Re: [Devmon] create new template question
|
From: W.J.M. N. <ne...@nl...> - 2010-03-03 07:27:31
|
Hello,
> I am trying to develop a new template for Cisco Wireless Controllers, and running into a snag with devmon's features. Here is a quick snippet of the SNMP conversations I am trying to analyze:
>
> (names of wireless access points connected to controller)
> snmpwalk -v2c -cpublic 10.13.1.4 .1.3.6.1.4.1.14179.2.2.1.1.3
> SNMPv2-SMI::enterprises.14179.2.2.1.1.3.0.35.235.10.79.64 = STRING: "wap-1st-2"
> SNMPv2-SMI::enterprises.14179.2.2.1.1.3.0.37.132.253.194.144 = STRING: "wap-2nd-5"
> SNMPv2-SMI::enterprises.14179.2.2.1.1.3.0.37.132.253.200.192 = STRING: "wap-2nd-4"
>
> (number of clients connected to each WAP - by radio)
> snmpwalk -v2c -cpublic 10.13.1.4 .1.3.6.1.4.1.14179.2.2.2.1.15
> SNMPv2-SMI::enterprises.14179.2.2.2.1.15.0.35.235.10.79.64.0 = Counter32: 4
> SNMPv2-SMI::enterprises.14179.2.2.2.1.15.0.35.235.10.79.64.1 = Counter32: 1
> SNMPv2-SMI::enterprises.14179.2.2.2.1.15.0.37.132.253.194.144.0 = Counter32: 7
> SNMPv2-SMI::enterprises.14179.2.2.2.1.15.0.37.132.253.194.144.1 = Counter32: 3
> SNMPv2-SMI::enterprises.14179.2.2.2.1.15.0.37.132.253.200.192.0 = Counter32: 1
> SNMPv2-SMI::enterprises.14179.2.2.2.1.15.0.37.132.253.200.192.1 = Counter32: 1
>
> In the above examples, 0.35.235.10.79.64 resents a single WAP (the repeater part of the oid identifies the MAC address in decimal). In the above example, the WAP labeled as wap-1st-2 has a "repeater OID" of 0.35.235.10.79.64.0, which corresponds to a MAC address of 00:23:eb:0a:4f:40 (not particularly germane to this question, but I thought I would include the example).
>
> Each WAP has two radios, which lead to two different results (.0 and .1).
>
> What I would *like* to have is a nice devmon table similar to "regular" switches, with the WAP name in the 1st column, the .0 client count in column 2, and .1 count in column 3:
>
> WAP Name 2.4GHz clients 5 GHz clients
> wap-1st-2 4 1
> wap-2nd-5 7 3
> wap-2nd-4 1 1
>
> But I believe I have found a limitation with the devmon template capabilities. I can easily get the names of the WAPs, and even the repeater section of the OID (via a transform of INDEX). But I have tried the CHAIN, INDEX, and REGSUB transform, and nothing is able to produce the results I seek.
>
> I need to have a "devmon transforms" that can give me a new oid like follows:
>
> wapClients24 = {.1.3.6.1.4.1.14179.2.2.2.1.15.}{wapRepeaterOid}.0
> wapClients24 = {.1.3.6.1.4.1.14179.2.2.2.1.15.}{wapRepeaterOid}.1
>
> In all my reading of the devmon documentation, I cannot think of any scheme to do this type of operation.
>
AFAIK, that is not possible in Devmon. However, the intended result can
be obtained using a server-side script on Xymon. The following perl
script may do what you want:
#!/usr/bin/perl
#
# WAP-usage: determine the number of users per radio of the Wireless Access
# Points (WAPs) as well as the number of users per (Cisco)
# Wireless LAN Controller.
#
use strict ;
use POSIX qw/ strftime / ; # Format time
#
# Installation constants.
#
my $XyDisp= $ENV{BBSERVERHOSTNAME} ; # Name of monitor server
my $XySend= $ENV{BB} ; # Monitor interface program
my $FmtDate= "%Y.%m.%d %H:%M:%S" ; # Default date format
$FmtDate= $ENV{BBDATEFORMAT} if defined $ENV{BBDATEFORMAT} ;
#
my $WLC= 'wlc00' ; # Name of Wireless LAN Controller
my $TestName= 'wap-user' ; # Xymon test name
#
# Define the commands to retrieve the information, using SNMP, to determine
# the number of users. One command is used to retrieve the names of the
# access points, the other to retrieve the number of users per access point
# and per radio.
#
my $SnmpCmd0= "snmpwalk -c public -v 2c $WLC .1.3.6.1.4.1.14179.2.2.1.1.3" ;
my $SnmpCmd1= "snmpwalk -c public -v 2c $WLC
.1.3.6.1.4.1.14179.2.2.2.1.15" ;
#
# Variable allocation.
#
my $Now= strftime( $FmtDate, localtime ) ; # Timestamp of tests
my $Cmd ; # Full blown snmpwalk command
my $Color= "green" ; # Test status
my %Map = () ; # Mapping of code to name
my %Users= () ; # Number of users per wap per radio
my @Lines ; # Command output
my $Result= "" ; # Test result
#
# Determine the names and the associated codes of the wireless access
points.
#
@Lines= `$SnmpCmd0` ;
foreach ( @Lines ) {
if ( m/2\.2\.1\.1\.3\.([\.\d]+) = STRING: \"(nlrwap\d\d)\"/ ) {
$Map{$1}= $2 ;
} # of if
} # of foreach
#
# Determine the number of users per access point and per radio.
#
@Lines= `$SnmpCmd1` ; # Retrieve user counts
foreach ( @Lines ) {
if ( m/2\.2\.2\.1\.15\.([\.\d]+)\.(\d) = Counter32: (\d+)/ ) {
next unless defined $Map{$1} ;
$Users{$Map{$1}}{$2}= $3 ; # Save user count
} # of if
} # of foreach
#
# Report the number of users for each WAP to Xymon.
#
foreach my $wap ( sort keys %Users ) {
$Result= "<!--\n" ;
foreach my $radio ( sort keys %{$Users{$wap}} ) {
$Result.= "Radio$radio : $Users{$wap}{$radio}\n" ;
} # of foreach
$Result.= "-->" ;
$Result= "\"status $wap.$TestName green $Now\n" .
"Number of WAP users\n\n$Result\"\n" ;
`$XySend $XyDisp $Result` ; # Inform Xymon
} # of foreach
#
# Report the total number of users of the WLC to Xymon.
#
@Lines= ( 0, 0 ) ; # Preset total number of users
$Result= sprintf( "%-9s %7s %7s\n", 'AP', '2.4 GHz', '5.0 GHz' ) ;
foreach my $wap ( sort keys %Users ) {
$Users{$wap}{1}= 0 unless defined $Users{$wap}{1} ;
$Result.= sprintf( "%-9s %7d %7d\n", $wap,
$Users{$wap}{0}, $Users{$wap}{1} ) ;
$Lines[0]+= $Users{$wap}{0} ;
$Lines[1]+= $Users{$wap}{1} ;
} # of foreach
$Result= "\"status $WLC.$TestName green $Now\n" .
"Number of WAP users\n\n$Result<!--\n" .
"Radio0 : $Lines[0]\n" .
"Radio1 : $Lines[1]\n" .
"-->\"\n" ;
`$XySend $XyDisp $Result` ; # Inform Xymon
Kind regards,
Wim Nelis.
*******************************************************************************************************
The NLR disclaimer (http://www.nlr.nl/emaildisclaimer) is valid for NLR e-mail messages.
*******************************************************************************************************
|
