Chapter 27 Access Control

27.3.1 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.

27.3.2 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

27.3.3SNMP Traps

The Switch sends traps to an SNMP manager when an event occurs. The following tables outline the SNMP traps by category.

An OID (Object ID) that begins with “1.3.6.1.4.1.890.1.5.8.16” (ES-2024A) or

“1.3.6.1.4.1.890.1.5.8.27” (ES-2024PWR) is defined in private MIBs. Otherwise, it is a standard MIB OID.

Table 76 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.

 

 

 

 

fanspeed

FanSpeedEventOn

1.3.6.1.4.1.890.1.5.8.16.27.2.1

This trap is sent when the fan speed

 

 

 

goes above or below the normal

 

 

 

operating range.

 

 

 

 

 

FanSpeedEventClear

1.3.6.1.4.1.890.1.5.8.27.27.2.2

This trap is sent when the fan speed

 

 

 

returns to the normal operating

 

 

 

range.

 

 

 

 

temperature

TemperatureEventOn

1.3.6.1.4.1.890.1.5.8.16.27.2.1

This trap is sent when the

 

 

 

temperature goes above or below

 

 

 

the normal operating range.

 

 

 

 

 

TemperatureEventClear

1.3.6.1.4.1.890.1.5.8.27.27.2.2

This trap is sent when the

 

 

 

temperature returns to the normal

 

 

 

operating range.

 

 

 

 

 

199

ES-2024 Series User’s Guide