Cisco Catalyst 3750-X User Manual

35-3
Catalyst 3750-X and 3560-X Switch Software Configuration Guide
OL-21521-01
Chapter 35 Configuring SNMP
Understanding SNMP
Table 35-1 identifies the characteristics of the different combinations of security models and levels.
You must configure the SNMP agent to use the SNMP version supported by the management station.
Be
cause an agent can communicate with multiple managers, you can configure the software to support
communications using SNMPv1, SNMPv2C, or SNMPv3.
SNMP Manager Functions
The SNMP manager uses information in the MIB to perform the operations described in Table 35-2.
Ta ble 35-1 SNMP Security Models and Levels
Model Level Authentication Encryption Result
SNMPv1 noAuthNoPriv Community string No Uses a community string match for authentication.
SNMPv2C noAuthNoPriv Community string No Uses a community string match for authentication.
SNMPv3 noAuthNoPriv Username No Uses a username match for authentication.
SNMPv3 authNoPriv Message Digest 5
(MD5)
or Secure
Hash Algorithm
(SHA)
No Provides authentication based on the HMAC-MD5
or H
MAC-SHA algorithms.
SNMPv3 authPriv MD5 or SHA Data
Encryp
tion
Standard
(DES) or
Advanced
Encryption
Standard
(AES)
Provides authentication based on the HMAC-MD5
or H
MAC-SHA algorithms.
Allows specifying the User-based Security Model
(USM) with
these encryption algorithms:
• DES 56-bit encryption in addition to
authentication based on the CBC-DES
(DES-56) standard.
• 3DES 168-bit encryption
• AES 128-bit, 192-bit, or 256-bit encryption
Ta ble 35-2 SNMP Operations
Operation Description
get-request Retrieves a value from a specific variable.
get-next-request Retrieves a value from a variable within a table.
1
1. With this operation, an SNMP manager does not need to know the exact variable name. A sequential search is performed to
find the needed variable from within a table.
get-bulk-request
2
2. The get-bulk command only works with SNMPv2 or later.
Retrieves large blocks of data, such as multiple rows in a table, that would
otherwise require the transmission of many small blocks of data.
get-response Replies to a get-request, get-next-request, and set-request sent by an NMS.
set-request Stores a value in a specific variable.
trap An unsolicited message sent by an SNMP a
gent to an SNMP manager when some
event has occurred.

Cisco Catalyst 3750-X Specifications

General

Switching Capacity	160 Gbps
Stacking Bandwidth	64 Gbps
Max Stacking Units	9
Layer Support	Layer 2 and Layer 3
Form Factor	Rack-mountable
DRAM	256 MB
Flash Memory	64 MB
Model	Cisco Catalyst 3750-X Series
Ports	24 or 48 10/100/1000 Ethernet ports
Uplink Interfaces	4 SFP or 2 SFP+
Features	StackWise Plus, EnergyWise
Image	IP Base or IP Services
Operating Temperature	0 to 40°C
Operating Humidity	10 to 85% noncondensing