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Nortel Networks 5399 and 8000 Access Switch SNMP MIB Reference
1-2 300861-C Rev. 00
SNMP Commands
The SNMP agent software in the RAC supports the SNMP commands get,
get-next, set,andtrap as defined in RFC 1157. Table 1-1 describes these
commands.
Table 1-1. Supported SNMP Commands
When the allow_snmp_sets parameter is enabled, the RAC accepts SNMP set
commands from IP host addresses and communities that have read-write access
permissions. When disabled, the RAC rejects all SNMP set commands; the RAC
SNMP agent returns the error no such name for the first object in the set command
(for more details, see allow_snmp_sets in the Nortel Networks 5399 and 8000
Access Switch Software Reference).
SNMP version 1 is not a secure protocol. SNMP bypasses the RAC’s security
measures. If security is a concern, the administrator should consider taking the
following security measures:
• Define the community strings for specific IP addresses with read-write access.
• Disable all other SNMP access by defining none or read-only access.
• Institute filters on any firewall router to block SNMP traffic from outside the
local network. This is good practice in all cases, not just concerning the RAC.
The specifics of using the SNMP commands depend on the management station
(see your SNMP management station documentation). The MIB definitions in the
files provided in the directory /annex_root/src/snmp must be compiled and
included in your management station database before you can manage the RAC
using SNMP.
Action Description
get Retrieves the value of a specific object from one of the supported
MIBs.
get-next Traverses the MIB tree to retrieve the next object’s management
information.
set Modifies the values of MIB objects. The RAC private enterprise
MIB and several objects in the standard MIBs allow you to
configure the RAC from an SNMP management station on the
network rather than using the na utility or CLI admin command.
trap Asynchronously reports significant events.