Configuring the SNMP Server on the JUNOSe Router

Access to the SNMP server on the router by an SNMP client is governed by a proprietary SNMP community table. This table identifies communities that have read-only, read-write, or administrative permission to the SNMP Management Information Base (MIB) stored on a particular server.

When an SNMP server receives a request, the server extracts the client’s IP address and the community name. The SNMP server searches the community table for a matching community.

• If a match is found, its access list name is used to validate the IP address.
  • If the access list name is null, the IP address is accepted.
  • If an invalid IP address results, an SNMP authentication error is sent to the SNMP client.
• If a match is not found, an SNMP authentication error results.

To configure the SNMP agent on the JUNOSe router:

1. Switch to the virtual router for which you want to create an SRC client.

   host1#(config)virtual-router <vrName>

2. Enable the SNMP agent.

   host1:<vrName>#(config)snmp-server

3. Configure at least one authorized SNMP read-write community (SNMPv1/v2c), which provides SNMP client access.

   host1:<vrName>(config)#snmp-server community boston rw

4. (Optional) Configure a read-only community.
5. host1:<vrName>#(config)snmp-server public ro

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