# Before You Configure SNMP

Before you configure SNMP, make sure that at least one IP address is configured on your router. See Accessing ERX Routers in the ERX Hardware Guide or Accessing E Series Routers in the E120 and E320 Hardware Guide.

Also make sure that you have the necessary configuration information for:

- Communities and their assigned privileges
- IP addresses of SNMP clients and trap recipients
- SNMPv3 users