192 Configuring Security using web-based managementItem DescriptionAuthentication ProtocolsSupportedThe registration point for standards-track authenticationprotocols used in SNMP Management Frameworks.The registration points are: None, HMAC MD5, andHMAC SHA.ATTENTIONThe Ethernet Routing Switch 2500 Series supportsonly the MD5 authentication protocol.PrivateProtocolsSupportedThe registration point for standards-track privacyprotocols used in SNMP Management Frameworks.The registration points are: None, CBC-DES, AES or3DES.ATTENTIONThe Ethernet Routing Switch 2500 Series does notsupport privacy protocols.Table 90 "SNMPv3 Counters section fields" (page 192) describesthe fields on the SNMPv3 Counters section of the SNMPv3 SystemInformation page.Table 90SNMPv3 Counters section fieldsItem DescriptionUnavailableContextsThe total number of packets dropped by the SNMPengine because the context contained in the messageis unavailable.UnknownContextsThe total number of packets dropped by the SNMPengine because the context contained in the messageis unknown.UnsupportedSecurityLevelsThe total number of packets dropped by the SNMPengine because they requested a security level that isunknown to the SNMP engine or otherwise unavailable.Not in TimeWindowsThe total number of packets dropped by the SNMPengine because they appeared outside of theauthoritative SNMP window of the engine.Nortel Ethernet Routing Switch 2500 SeriesSecurity — Configuration and ManagementNN47215-505 (323165-B) 02.01 Standard4.1 19 November 2007Copyright © 2007, Nortel Networks.
