OSPF neighbors monitoring.

[mschedrin]

I am trying to configure monitoring of ospf peers on several my router via snmp. When session is up I can get all information via snmp:

root@zabbix-main-64:~# snmp ip-addr 1.3.6.1.2.1.14.10.1.6.256.256.144.18.0
iso.3.6.1.2.1.14.10.1.6.256.256.144.18.0 = INTEGER: 8

But when interface goes down:

root@zabbix-main-64:~# snmp ip-addr 1.3.6.1.2.1.14.10.1.6.256.256.144.18.0
iso.3.6.1.2.1.14.10.1.6.256.256.144.18.0 = No Such Instance currently exists at this OID

OID does not exist any more, item becomes unsupported and I cannot trigger anything on this item. Is there any workarounds?

Of course I can use external scripts for this check, but I am looking for more tidy solution.
And yes, I know about https://support.zabbix.com/browse/ZBXNEXT-341

[ktstyle]

It's real problem. And i not understand why zabbix not have a trigger for status "Not supported".

UP.

[mirddin]

Does anybody know any workaround for this issue?

[mschedrin]

Ok guys, 4 years later I will post the solution here, as zabbix still can't handle this issue properly(shame!).
I've made a simple script called snmp-wrapper which returns proper integer value, understandable by zabbix, instead of "No Such Instance currently exists at this OID" like snmpget does. The script has been working for a couple years in my production environment and proved itself to be reliable enough.

Configure zabbix item to use external check, thus the script. See comments in the script for more details.

#!/usr/bin/php
<?php
//This is just a wrapper to snmp get query. If SNMP OID does not exist it returns specified value which will indicate a failure.
//arguments: snmp version= 1 or 2, snmp community, IP, OID, what to return on failure
// call from zabbix as external check: snmp-wrapper.php[snmp_version,{$SNMP_COMMUNITY},{HOST.CONN},'.1.3.6.1.4.1.8059.1.2.2.1.1.1.2.1.2.{#SNMPINDEX}',0]
// example call from CLI: ./snmp-wrapper.php 1 community 172.27.252.60 .1.3.6.1.4.1.8059.1.2.2.1.1.1.2.1.2.1 0
if (count($argv) < 6) exit("not enough command line arguments!\n"); 
$snmp_ver = $argv[1];
$snmp_comm = $argv[2];
$ip = $argv[3];
$snmp_oid = $argv[4];
$return_on_fail = $argv[5];

/*//this debug will appear in zabbix log:
$STDERR = fopen('php://stderr', 'w+');
fwrite($STDERR, "DEBUG:$snmp_oid\n");
echo '1';
die;*/

if ($snmp_ver == 1) {$ret=@snmpget($ip, $snmp_comm, $snmp_oid, 30*1000000, 5);}
else if ($snmp_ver == 2) {$ret=@snmp2_get($ip, $snmp_comm, $snmp_oid, 30*1000000, 5);}
else die("unsupported snmp version $snmp_ver\n");
if (!$ret || strlen($ret)<9) {echo $return_on_fail;}
else {
        $ret = substr($ret, 9);
        echo $ret;
}
//var_dump($ret);
?>

[mschedrin]

P.S. Go and vote for https://support.zabbix.com/browse/ZBXNEXT-1791
if you wish to have zabbix to handle this type of checks natively, without any kludges.

[grmnrvs]

Ok guys, 4 years later I will post the solution here, as zabbix still can't handle this issue properly(shame!).
I've made a simple script called snmp-wrapper which returns proper integer value, understandable by zabbix, instead of "No Such Instance currently exists at this OID" like snmpget does. The script has been working for a couple years in my production environment and proved itself to be reliable enough.

Configure zabbix item to use external check, thus the script. See comments in the script for more details.

#!/usr/bin/php
<?php
//This is just a wrapper to snmp get query. If SNMP OID does not exist it returns specified value which will indicate a failure.
//arguments: snmp version= 1 or 2, snmp community, IP, OID, what to return on failure
// call from zabbix as external check: snmp-wrapper.php[snmp_version,{$SNMP_COMMUNITY},{HOST.CONN},'.1.3.6.1.4.1.8059.1.2.2.1.1.1.2.1.2.{#SNMPINDEX}',0]
// example call from CLI: ./snmp-wrapper.php 1 community 172.27.252.60 .1.3.6.1.4.1.8059.1.2.2.1.1.1.2.1.2.1 0
if (count($argv) < 6) exit("not enough command line arguments!\n");
$snmp_ver = $argv[1];
$snmp_comm = $argv[2];
$ip = $argv[3];
$snmp_oid = $argv[4];
$return_on_fail = $argv[5];

/*//this debug will appear in zabbix log:
$STDERR = fopen('php://stderr', 'w+');
fwrite($STDERR, "DEBUG:$snmp_oid\n");
echo '1';
die;*/

if ($snmp_ver == 1) {$ret=@snmpget($ip, $snmp_comm, $snmp_oid, 30*1000000, 5);}
else if ($snmp_ver == 2) {$ret=@snmp2_get($ip, $snmp_comm, $snmp_oid, 30*1000000, 5);}
else die("unsupported snmp version $snmp_ver\n");
if (!$ret || strlen($ret)<9) {echo $return_on_fail;}
else {
$ret = substr($ret, 9);
echo $ret;
}
//var_dump($ret);
?>

Hi can you resolve it? Because i've a similar problem with OSPF protocol over HP Switch.

I will like to monitor when the adjacent routes are down but i can't get results... i'm using the Stephen Fritz template version 2.0 available on the next link

These is when OSPF Neighbor State its ok.


These is when OSPF Neighbor State its down.


And these are the mistakes that I get (Items)
The red letters says:
SNMP error: (genError) A general failure occured


And these are the mistakes that I get (Triggers)
The red letters says: Cannot evaluate expression: "Cannot evaluate function "Jocoli: ospfNbrState[10.0.15.1].last()": item is not supported.".
Cannot evaluate expression: "Cannot evaluate function "Jocoli: ospfIfAdminStat[10.0.15.2].last()": item is not supported.".



Any ideas about these errors?

Thank you very much for your attention