Process

The proxy forwarder process is as follows:

1. An NMS prepares an SNMPv3 request PDU. This PDU contains the switch security credentials, including the engine ID and context name of the ATM Uplink module.
2. The supervisor modules receives the PDU from the NMS. It verifies that the security information matches the credentials of the switch. When the supervisor detects an engine ID and context name that differ from those of the switch, it checks the snmpProxyTable for a match.
3. The switch uses the information in the snmpProxyTable (and, because the indicated target is an SNMPv1 agent, the snmpCommunityTable) to convert the PDU to an SNMPv1 PDU and then send it to the ATM Uplink module.
4. The ATM Uplink module receives and processes the PDU and sends its response to the supervisor module.
5. The supervisor module matches the response to its pending forwarded requests, converts the SNMPv1 PDU to an SNMPv3 PDU, and forwards it to the NMS.