Chapter 37 Access Control
GS1920 Series User’s Guide
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SNMP v3 and Security
SNMP v3 enhances security for SNMP management. SNMP managers can be required to
authenticate with agents before conducting SNMP management sessions.
Security can be further enhanced by encrypting the SNMP messages sent from the managers.
Encryption protects the contents of the SNMP messages. When the contents of the SNMP messages
are encrypted, only the intended recipients can read them.
Supported MIBs
MIBs let administrators collect statistics and monitor status and performance.
The Switch supports the following MIBs:
• SNMP MIB II (RFC 1213)
• RFC 1157 SNMP v1
• RFC 1493 Bridge MIBs
• RFC 1643 Ethernet MIBs
• RFC 1155 SMI
• RFC 2674 SNMPv2, SNMPv2c
• RFC 1757 RMON
• SNMPv2, SNMPv2c or later version, compliant with RFC 2011 SNMPv2 MIB for IP, RFC 2012
SNMPv2 MIB for TCP, RFC 2013 SNMPv2 MIB for UDP
SNMP Traps
The Switch sends traps to an SNMP manager when an event occurs. The following tables outline the
SNMP traps by category.
Table 150 SNMP System Traps
OPTION OBJECT LABEL OBJECT ID DESCRIPTION
coldstart coldStart 1.3.6.1.6.3.1.1.5.1 This trap is sent when the Switch is
turned on.
warmstart warmStart 1.3.6.1.6.3.1.1.5.2 This trap is sent when the Switch
restarts.
linkup linkUp 1.3.6.1.6.3.1.1.5.4 This trap is sent when the Ethernet
link is up.
linkdown linkDown 1.3.6.1.6.3.1.1.5.3 This trap is sent when the Ethernet
link is down.
lldp lldpRemTablesChange 1.0.8802.1.1.2.0.0.1 The trap is sent when entries in the
remote database have any updates.
Link Layer Discovery Protocol
(LLDP), defined as IEEE 802.1ab,
enables LAN devices that support
LLDP to exchange their configured
settings. This helps eliminate
configuration mismatch issues.
