Troubleshooting guide

1-3
Cisco Wide Area Application Services Configuration Guide
OL-26579-01
Chapter 1 Configuring SNMP Monitoring
About SNMP
Figure 1-1 SNMP Components in a WAAS Network
Supported SNMP Versions
The WAAS software supports the following versions of SNMP:
• Version 1 (SNMPv1)—This is the initial implementation of SNMP. See the RFC 1157 for a full
description of its functionality.
• Version 2 (SNMPv2c)—This is the second release of SNMP, described in RFC 1902. It provides
additions to data types, counter size, and protocol operations.
• Version 3 (SNMPv3)—This is the most recent version of SNMP, defined in RFC 2271 through
RFC 2275.
Each Cisco device running WAAS software contains the software necessary to communicate information
about device configuration and activity using the SNMP protocol.
SNMP Security Models and Security Levels
SNMPv1 and SNMPv2c do not have any security (that is, authentication or privacy) features to keep
SNMP packet traffic confidential. As a result, packets on the wire can be detected and SNMP community
strings compromised.
To solve the security shortcomings of SNMPv1 and SNMPv2c, SNMPv3 provides secure access to
WAAS devices by authenticating and encrypting packets over the network. The SNMP agent in the
WAAS software supports SNMPv3 as well as SNMPv1 and SNMPv2c.
The following security features are provided in SNMPv3:
• Message integrity—Ensures that nothing has interfered with a packet during transmission.
• Authentication—Determines that the message is from a valid source.
• Encryption—Scrambles the contents of a packet to prevent it from being seen by an
unauthorized source.
SNMP agent
Local management database
247103
WAE
WAAS CLI
WAAS
Central Manger GUI
SNMP management station
(SNMP trap host)
SNMP traps
and statistics
SNMP
requests