46Simple Network Management Protocol (SNMP)Simple network management protocol (SNMP) is supported on Dell Networking OS.NOTE: On Dell Networking routers, standard and private SNMP management information bases (MIBs) are supported,including allGet and a limited number ofSet operations (such as set vlan and copy cmd).Protocol OverviewNetwork management stations use SNMP to retrieve or alter management data from network elements.A datum of management information is called a managed object; the value of a managed object can be static or variable. Networkelements store managed objects in a database called a management information base (MIB).MIBs are hierarchically structured and use object identifiers to address managed objects, but managed objects also have a textualname called an object descriptor.Implementation InformationThe following describes SNMP implementation information.• Dell Networking OS supports SNMP version 1 as defined by RFC 1155, 1157, and 1212, SNMP version 2c as defined by RFC 1901,and SNMP version 3 as defined by RFC 2571.• Dell Networking OS supports up to 16 trap receivers.• Dell Networking OS implementation of the sFlow MIB supports sFlow configuration via SNMP sets.• SNMP traps for the spanning tree protocol (STP) and multiple spanning tree protocol (MSTP) state changes are based onBRIDGE MIB (RFC 1483) for STP and IEEE 802.1 draft ruzin-mstp-mib-02 for MSTP.SNMPv3 Compliance With FIPSThis functionality is supported on the Z9000 platform.SNMPv3 is compliant with the Federal information processing standard (FIPS) cryptography standard. The Advanced EncryptionStandard (AES) Cipher Feedback (CFB) 128-bit encryption algorithm is in compliance with RFC 3826. SNMPv3 provides multipleauthentication and privacy options for user configuration. A subset of these options are the FIPS-approved algorithms: HMAC-SHA1-96 for authentication and AES128-CFB for privacy. The other options are not FIPS-approved algorithms because of knownsecurity weaknesses. The AES128-CFB privacy option is supported and is compliant with RFC 3826.The SNMPv3 feature also uses a FIPS-validated cryptographic module for all of its cryptographic operations when the system isconfigured with the fips mode enable command in Global Configuration mode. When the FIPS mode is enabled on the system,SNMPv3 operates in a FIPS-compliant manner, and only the FIPS-approved algorithm options are available for SNMPv3 userconfiguration. When the FIPS mode is disabled on the system, all options are available for SNMPv3 user configuration.The following table describes the authentication and privacy options that can be configured when the FIPS mode is enabled ordisabled:688 Simple Network Management Protocol (SNMP)
