Enterasys N Standalone (NSA) Series Configuration Manual page 366

SNMP Configuration Summary
Using SNMP Contexts to Access Specific MIBs or Routing Modules
All SNMP contexts known to the device can be displayed using the show snmp context command
as described in Section
Examples
This example permits the "powergroup" to manage all MIBs via SNMPv3:
Matrix(rw)->set snmp access powergroup security-model usm
This example grants the "powergroup" SNMPv3 management access from all router modules when
operating in router mode:
Matrix(rw)->set snmp access powergroup security-model usm context router prefix
This example grants the "powergroup" SNMPv3 management access from the router running on
module 1 when operating in router mode:
Matrix(rw)->set snmp access powergroup security-model usm context router1 exact
For information on preparing the device for router mode, refer back to
5-4 Matrix NSA Series Configuration Guide
5.3.4.2.
Section 2.3.