snmpwalk command not show appropriate output.

gardenair · 09-17-2012, 03:07 AM

hi,
I am going to configure MRTG on my system. To install it I use

Code:

# yum install mrtg net-snmp net-snmp-utils

To determine if snmp server is running or not

Quote:

# ps -aux | grep snmp
Warning: bad syntax, perhaps a bogus '-'? See /usr/share/doc/procps-3.2.7/FAQ
root 15903 0.3 0.1 26628 5284 ? Sl 12:47 0:00 /usr/sbin/snmpd -Lsd -Lf /dev/null -p /var/run/snmpd.pid -a
root 15908 0.0 0.0 4012 684 pts/1 S+ 12:48 0:00 grep snmp

Alternate I use

Code:

# lsof -i :199
COMMAND   PID USER   FD   TYPE DEVICE SIZE NODE NAME
snmpd   15903 root    9u  IPv4  47423       TCP 127.0.0.1:smux (LISTEN)

The problem is wheh I use "snmpwalk" command it show me the following error.

Code:

[root@pdc-proxy ~]# snmpwalk -v 1 -c public localhost IP-MIB::ipAdEntIfIndex

getaddrinfo: localhost Name or service not known
snmpwalk: Unknown host (localhost)
[root@pdc-proxy ~]#

I ven change local host with pdc-proxy but no success.

Code:

[root@pdc-proxy ~]# snmpwalk -v 1 -c public pdc-proxy IP-MIB::ipAdEntIfIndex
Timeout: No Response from pdc-proxy
[root@pdc-proxy ~]#

Please guide me how can I fix the issues.

thanks
gardenair

jlinkels · 09-17-2012, 03:29 AM

Quote:

Originally Posted by gardenair

getaddrinfo: localhost Name or service not known

This raises my suspicion something is wrong with your IP resolving. First try to ping localhost.
When that fails, try to resolve that problem. In any case, try to use 127.0.0.1 as host in snmpwalk and see what happens.

jlinkels

gardenair · 09-17-2012, 04:15 AM

thanks "jlinkels" for your kind reply. Well I have tried

Code:

[root@pdc-proxy ~]# snmpwalk -v 1 -c public 192.168.1.10 IP-MIB::ipAdEntIfIndex
[root@pdc-proxy ~]#

as well

Code:

[root@pdc-proxy ~]# snmpwalk -v 1 -c public 127.0.0.1 IP-MIB::ipAdEntIfIndex
[root@pdc-proxy ~]#

No output.I am not sure it is a DNS issue which is not resolving.Ok if we assume that it is a DNS issue then at least it should show any output when i use 127.0.0.1 in localhost.

I have you jet edit snmpd.conf file. Is thers need to 1st make some nessary changes and then use snmpwalk command ?

gards
gardenair

TB0ne · 09-17-2012, 06:19 AM

Quote:

Originally Posted by gardenair

thanks "jlinkels" for your kind reply. Well I have tried

Code:

[root@pdc-proxy ~]# snmpwalk -v 1 -c public 192.168.1.10 IP-MIB::ipAdEntIfIndex
[root@pdc-proxy ~]#

as well

Code:

[root@pdc-proxy ~]# snmpwalk -v 1 -c public 127.0.0.1 IP-MIB::ipAdEntIfIndex
[root@pdc-proxy ~]#

No output.I am not sure it is a DNS issue which is not resolving.Ok if we assume that it is a DNS issue then at least it should show any output when i use 127.0.0.1 in localhost.

I have you jet edit snmpd.conf file. Is thers need to 1st make some nessary changes and then use snmpwalk command ?

Instead of running all those commands in your first post, have you just run "/etc/init.d/snmpd status"?? Have you tried running "/etc/init.d/snmpd restart", to see if you have any configuration errors? You don't say what version/distro of Linux you're using, but was SNMP ever working on this system? Has it been configured, and if so, are you sure the RO string you specified is correct?? Did you check the snmpd.conf file?

gardenair · 09-17-2012, 12:33 PM

well every thing is correct only snmpd.conf is not configured.One thing is confusing me that
my full computer name is

Code:

srv1.test.local

Code:

and my system IP is 192.168.1.10
and subnetmask is 255.255.255.0

In

[root@srv1 ~]# vi /etc/snmp/snmpd.conf

Here under the line

Code:

com2sec local localhost public
com2sec srv1.test.local 192.168.1.0/24 public

please guide me that is it correct.I have to remove the line
com2sec local localhost public
and write
com2sec srv1.test.local 192.168.1.0/24 public

Please guide me which one is correct ?

gardenair

Habitual · 09-17-2012, 12:48 PM

Code:

cat /etc/hosts

output please.

gardenair · 09-17-2012, 12:57 PM

# cat /etc/hosts

127.0.0.1 localhost.localdomain localhost
192.168.1.10 srv1.test.local srv1
::1 localhost6.localdomain localhost6

But it is not the answer of my problem.

thanks