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Table Of Contents  The TCP/IP Guide
 9  TCP/IP Application Layer Protocols, Services and Applications (OSI Layers 5, 6 and 7)
      9  TCP/IP Network Configuration and Management Protocols (BOOTP, DHCP, SNMP and RMON)
           9  TCP/IP Network Management Framework and Protocols (SNMP and RMON)
                9  TCP/IP Simple Network Management Protocol (SNMP) Protocol
                     9  SNMP Protocol Messaging and Message Formats

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SNMP Version 1 (SNMPv1) Message Format
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 SNMP Version 3 (SNMPv3) Message Format
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SNMP Version 2 (SNMPv2) Message Formats
(Page 3 of 6)

Community-Based SNMP Version 2 (SNMPv2c) Message Format

This version of SNMPv2 was intended to keep the new protocol enhancements introduced by SNMPv2p but go back to the simple SNMPv1 security model. As such, the defining document for SNMPv2c, RFC 1901, specifies that its overall message format is the same as that of SNMPv1, except that the version number is changed. This is shown in Table 216 and Figure 281.


Table 216: Community-Based SNMP Version 2 (SNMPv2c) General Message Format

Field Name

Syntax

Size (bytes)

Description

Version

Integer

4

Version Number: Describes the SNMP version number of this message; used for ensuring compatibility between versions. For SNMPv2c, this value is 1.

Community

Octet String

Variable

Community String: Identifies the SNMP community in which the sender and recipient of this message are located.

PDU

—

Variable

Protocol Data Unit: The PDU being communicated as the body of the message.


Figure 281: Community-Based SNMP Version 2 (SNMPv2c) General Message Format

 

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