Why can't I get SNMP information from a device?
Intermapper requires that SNMP be available and configured to display traffic
information. The most common cause of not being able to see traffic is that you
haven't entered the SNMP Read-only community string. (This is like a password that
controls whether another computer can retrieve SNMP information.)
In order of simplest to most complex, here is a list of reasons that Intermapper
might not get SNMP information from a device:
l Wrong DNS name/IP address - (not likely, but we have to mention it)
l No connectivity - Can you ping the device from Intermapper?
l No SNMP agent on the device - Many devices or computers have optional
SNMP capabilities that must be installed separately.
l Is the SNMP agent disabled? - Many devices allow you to disable the
SNMP capability totally, or from certain ports.
l If the SNMP agent is based on net-snmp or UCD-snmp package - be
sure that the configuration file specifically lists Intermapper's IP address/subnet
as an allowed client
l In a custom probe, have you specified the OID properly? - (See the
OID Format FAQ (Pg 769) for details.)
l Wrong Community string - (have you tried 'public' ?)
l Access lists: does the equipment only allow SNMP access from certain
addresses?
l Firewalls: does a firewall block the SNMP port between your Mac
and the equipment?
l Bugs in the SNMP agent on the equipment - Intermapper uses SNMP
Get-Next-Requests in several places. We've seen certain equipment that fails
when queried this way.
Copyright © HelpSystems, LLC. Intermapper is a division of HelpSystems.
All trademarks and registered trademarks are the property of their respective owners.
05-01-2017 09:34AM.
- 768 -
SNMP Information
If you're sure that you've checked all these things and you still can't get SNMP
information, please get back to us at support@intermapper.com. We may have
some tricks up our sleeves. (Or we may wind up learning something!)