snmpwalk works, but check_snmp does not

[Roger]

I have an interesting issue when using the Nagios plugin to make an SNMP
query to a Netscreen 208.

I have two Nagios servers -- Gentoo and CentOS -- and one of the check_snmp
commands are not working on CentOS server (Nagios03) when I run it *exactly*
from the command line like I do in Gentoo (Nagios01)

e.g.

>From CentOS (does not work)

[root at nagios03 plugins]# pwd
/usr/lib/nagios/plugins
[root at nagios03 plugins]# ./check_snmp -C myPublicString -o
nsVpnMonP2State.0-l DC_VPN_Status -c 1: -H
10.0.11.9
DC_VPN_Status problem - No data received from host
CMD: /usr/bin/snmpget -t 1 -r 5 -m ALL -v 1 -c myPublicString 10.0.11.9:161
nsVpnMonP2State.0

>From Gentoo (works)

nagios01 libexec # pwd
/usr/nagios/libexec
nagios01 libexec # ./check_snmp -C myPublicString -o nsVpnMonP2State.0 -l
DC_VPN_Status -c 1: -H 10.0.11.9
DC_VPN_Status OK - 1 | NETSCREEN-VPN-MON-MIB::nsVpnMonP2State.0=1;;;;

Normally, I'd think that it is an issue with the polled device not being
configured properly, but since I can 'snmpwalk' it from the CentOS
box in question, I'm not sure what to do.

Any suggestions?
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