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Nagios - find interface name

PostPosted: Fri Dec 10, 2021 3:21 am
by hausrocker
Hi

I have basically 2 questions:

1. How can I manually issue a certain command via console to manually start a check? Right now I am always downloading a .cfg file, change settings in switch.cfg for example, upload the file again, run pre-flight check, reload nagios service, issue new check, wait some minutes, see the result.
Is there a way to start this command via console:
Code: Select all
define service{
   use         generic-service   ; Inherit values from a template
   host_name      N8-TWB
   service_description   Uplink   
   check_command      check_snmp_int!ethernetg11!400000!600000!0!800000
   }


2. This particular switch does not let me use the default cisco cli to find out about the interface name. I always have an error "ERROR : Unknown interface ethernet " in the check on the nagios webinterface.
I have SNMP running and already used a SNMP tester with "scan interfaces".

There is a list of interfaces the SNMP Tester gives me:
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Found standard interfaces:
1:Ethernet Interface: (001) Ethernet Interface Traffic,Not Connected,1 GBit/s,Ethernet,Ethernet Interface
2:Ethernet Interface: (002) Ethernet Interface Traffic,Not Connected,1 GBit/s,Ethernet,Ethernet Interface
3:Ethernet Interface: (003) Ethernet Interface Traffic,Not Connected,1 GBit/s,Ethernet,Ethernet Interface
4:Ethernet Interface: (004) Ethernet Interface Traffic,Not Connected,1 GBit/s,Ethernet,Ethernet Interface
5:Ethernet Interface: (005) Ethernet Interface Traffic,Not Connected,1 GBit/s,Ethernet,Ethernet Interface
6:Ethernet Interface: (006) Ethernet Interface Traffic,Not Connected,1 GBit/s,Ethernet,Ethernet Interface
7:Ethernet Interface: (007) Ethernet Interface Traffic,Not Connected,1 GBit/s,Ethernet,Ethernet Interface
8:Ethernet Interface: (008) Ethernet Interface Traffic,Not Connected,1 GBit/s,Ethernet,Ethernet Interface
9:Ethernet Interface: (009) Ethernet Interface Traffic,Not Connected,1 GBit/s,Ethernet,Ethernet Interface
10:Ethernet Interface: (010) Ethernet Interface Traffic,Not Connected,1 GBit/s,Ethernet,Ethernet Interface
11:Uplink SX350: (011) Uplink SX350 Traffic,Connected,1 GBit/s,Ethernet,Uplink SX350
12:Uplink Unifi: (012) Uplink Unifi Traffic,Connected,1 GBit/s,Ethernet,Uplink Unifi
13:Ethernet Interface: (013) Ethernet Interface Traffic,Not Connected,1 GBit/s,Ethernet,Ethernet Interface
14:Ethernet Interface: (014) Ethernet Interface Traffic,Not Connected,1 GBit/s,Ethernet,Ethernet Interface
15:Ethernet Interface: (015) Ethernet Interface Traffic,Not Connected,1 GBit/s,Ethernet,Ethernet Interface
16:Ethernet Interface: (016) Ethernet Interface Traffic,Not Connected,1 GBit/s,Ethernet,Ethernet Interface
17:Ethernet Interface: (017) Ethernet Interface Traffic,Not Connected,1 GBit/s,Ethernet,Ethernet Interface
18:Ethernet Interface: (018) Ethernet Interface Traffic,Connected,1 GBit/s,Ethernet,Ethernet Interface
19:Ethernet Interface: (019) Ethernet Interface Traffic,Not Connected,1 GBit/s,Ethernet,Ethernet Interface
20:Ethernet Interface: (020) Ethernet Interface Traffic,Not Connected,1 GBit/s,Ethernet,Ethernet Interface
21:Ethernet Interface: (021) Ethernet Interface Traffic,Not Connected,1 GBit/s,Ethernet,Ethernet Interface
22:Ethernet Interface: (022) Ethernet Interface Traffic,Not Connected,1 GBit/s,Ethernet,Ethernet Interface
23:Ethernet Interface: (023) Ethernet Interface Traffic,Not Connected,1 GBit/s,Ethernet,Ethernet Interface
24:Ethernet Interface: (024) Ethernet Interface Traffic,Not Connected,1 GBit/s,Ethernet,Ethernet Interface
1000:Ethernet Interface: (1000) Ethernet Interface Traffic,Not Present,,Ethernet,Ethernet Interface
1001:Ethernet Interface: (1001) Ethernet Interface Traffic,Not Present,,Ethernet,Ethernet Interface
1002:Ethernet Interface: (1002) Ethernet Interface Traffic,Not Present,,Ethernet,Ethernet Interface
1003:Ethernet Interface: (1003) Ethernet Interface Traffic,Not Present,,Ethernet,Ethernet Interface
1004:Ethernet Interface: (1004) Ethernet Interface Traffic,Not Present,,Ethernet,Ethernet Interface
1005:Ethernet Interface: (1005) Ethernet Interface Traffic,Not Present,,Ethernet,Ethernet Interface
1006:Ethernet Interface: (1006) Ethernet Interface Traffic,Not Present,,Ethernet,Ethernet Interface
1007:Ethernet Interface: (1007) Ethernet Interface Traffic,Not Present,,Ethernet,Ethernet Interface
100000:vlan: (100000) vlan Traffic,Not Connected,,proprietary virtual/internal interface,vlan
100049:vlan: (100049) vlan Traffic,Connected,,proprietary virtual/internal interface,vlan
100081:vlan: (100081) vlan Traffic,Connected,,proprietary virtual/internal interface,vlan
100098:vlan: (100098) vlan Traffic,Connected,,proprietary virtual/internal interface,vlan
100100:vlan: (100100) vlan Traffic,Connected,,proprietary virtual/internal interface,vlan


But I can not test for Interface number 11: Tried ge11, GigabitEthernet11, Ethernet11, 11, Uplink SX-350- how do I find the right name?
Also anything with a space in the name, it only checks for the first part.
So if I use "check_snmp_int!Uplink SX350!400000!600000!0!800000" it gives me "ERROR : Unknown interface Uplink" - it ignores the 350. Or do I need to remove the space and rename the interface to Uplink-SX350 and then check for Uplink-SX350?

Thank you for help.

Re: Nagios - find interface name

PostPosted: Tue Jan 11, 2022 2:19 am
by hausrocker
no support at all on this topic? or too difficult?

Re: Nagios - find interface name

PostPosted: Tue Jan 11, 2022 2:19 pm
by gormank
For question #1 my system has the following for the check_snmp_int command.
For #2 have you tried double or single quoting the I/F name?

Command Name Command Line
check_snmp_int $USER1$/check_snmp_int.pl -H $HOSTADDRESS$ -C $ARG1$ -2 -n $ARG2$ -f -k -w $ARG3$ -c $ARG4$ $ARG5$

So

check_command check_snmp_int!ethernetg11!400000!600000!0!800000

Translates to something like this

/usr/local/nagios/libexec/check_snmp_int.pl -H put_your_switch_address_here -C ethernetg11 -2 -n 400000 -f -k -w 600000 -c 0 800000

You may want to run the script with -h to get a list of possible arguments since that looks a bit odd.

Re: Nagios - find interface name

PostPosted: Wed Jan 26, 2022 2:15 am
by hausrocker
Code: Select all
[root@deghmo02 libexec]# ./check_snmp_int.pl -H put_your_switch_address_here -C ethernetg11 -2 -n 400000 -f -k -w 600000 -c 0 800000
2 warning levels for bandwidth checks

Usage: ./check_snmp_int.pl [-v] -H <host> -C <snmp_community> [-2] | (-l login -x passwd [-X pass -L <authp>,<privp>)  [-p <port>] -n <name in desc_oid> [-i] [-a] [-r] [-f[eSyY]] [-k[qBMGu] -g -w<warn levels> -c<crit levels> -d<delta>] [-o <octet_length>] [-t <timeout>] [-s] --label [-V]


And regarding quoting:
You mean I should use
Code: Select all
check_snmp_int!"Uplink SX350"!400000!600000!0!800000
instead of
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check_snmp_int!Uplink SX350!400000!600000!0!800000
?

How can I find rhe right interface name with SNMP Walk when I use "scan interfaces"? That gives me a ton of possible names.