Installation of plugins and dependencies for monitoring netw

I have installed nagios 3.0RC3 on Linux (ubuntu 7.10) and everythings working fine except for monitoring a single switch (Netgear GSM7224 - (snmp compliant) ) however It reports that I have missing plugins:

Netgear-GSM7224

Port 1 Link Status CRITICAL 03-05-2008 15:11:44 0d 2h 58m 56s 3/3 (Return code of 127 is out of bounds - plugin may be missing)

Uptime CRITICAL 03-05-2008 15:12:57 0d 2h 57m 43s 3/3 (Return code of 127 is out of bounds - plugin may be missing)

I have found an rpm package for mtgtraf but when I try to install it it faills on dependencies. Is there a plugin for ubuntu which does not fail on dependencies?

root@linuxdev:/home/wokingadmin/Desktop# rpm -i mrtgtraf.rpm
warning: mrtgtraf.rpm: Header V3 DSA signature: NOKEY, key ID 1ac70ce6
error: Failed dependencies:
libc.so.6 is needed by nagios-plugins-mrtgtraf-1.4.8-9.fc6.i386
libc.so.6(GLIBC_2.0) is needed by nagios-plugins-mrtgtraf-1.4.8-9.fc6.i386
libc.so.6(GLIBC_2.1) is needed by nagios-plugins-mrtgtraf-1.4.8-9.fc6.i386
libc.so.6(GLIBC_2.3.4) is needed by nagios-plugins-mrtgtraf-1.4.8-9.fc6.i386
libc.so.6(GLIBC_2.4) is needed by nagios-plugins-mrtgtraf-1.4.8-9.fc6.i386
nagios-plugins = 1.4.8-9.fc6 is needed by nagios-plugins-mrtgtraf-1.4.8-9.fc6.i386
rtld(GNU_HASH) is needed by nagios-plugins-mrtgtraf-1.4.8-9.fc6.i386

Can any1 help me?