Snmp Versions; Snmp Manager Functions; Table 22-1 Snmp Operations - Cisco ONS 15454 SDH Configuration Manual

Chapter 22 Configuring SNMP

SNMP Versions

Both the ML-Series card and the ONS 15454 SONET/SDH nodes support SNMP Version 1 (SNMPv1)
and SNMP Version 2c (SNMPv2c), defined as:
•
•
SNMPv1 and SNMpv2c have the same security models and levels:
•
•
•
•
You must configure the SNMP agent to use the SNMP version supported by the management station.
Because an agent can communicate with multiple managers, you can configure the software to support
communications using SNMPv1, and SNMPv2c protocols.

SNMP Manager Functions

The SNMP manager uses information in the MIB to perform the operations described in
Table 22-1
Operation
get-request
get-next-request
get-bulk-request
get-response
set-request
trap
1. With this operation, an SNMP manager does not need to know the exact variable name. A sequential search is performed to
2. The get-bulk-request command only works with SNMPv2 or later.
SNMPv1—The Simple Network Management Protocol, a full Internet standard, defined in
RFC 1157.
SNMPv2c replaces the party-based administrative and security framework of SNMPv2 classic with
the community-string-based administrative framework of SNMPv2c while retaining the bulk
retrieval and improved error handling of SNMPv2classic. The bulk retrieval mechanism retrieves
tables and large quantities of information, minimizing the number of round-trips required. The
SNMPv2c improved error-handling includes expanded error codes that distinguish different kinds
of error conditions; these conditions are reported through a single error code in SNMPv1. Error
return codes in SNMPv2c report the error type.
Level—noAuthNoPriv
Authentication—community string
Encryption—none
Result—Uses a community string match for authentication.
SNMP Operations
Description
Retrieves a value from a specific variable.
Retrieves a value from a variable within a table.
2
Retrieves large blocks of data, such as multiple rows in a table, that would
otherwise require the transmission of many small blocks of data.
Replies to a get-request, get-next-request, or set-request sent by an NMS.
Stores a value in a specific variable.
An unsolicited message sent by an SNMP agent to an SNMP manager when some
event has occurred.
find the needed variable from within a table.
Cisco ONS 15454 and Cisco ONS 15454 SDH Ethernet Card Software Feature and Configuration Guide, R8.0
SNMP Versions
Table 22-1.
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22-3