Communication of SNMPv2 and SNMPv3 Commands over OSC Between an Optical ILA and NMS
Each Ioptical LA device has two bidirectional optical interfaces carrying the optical supervisory channel (OSC). The OSC signal (OC3) from two OSC ports is sent to the OSC field-programmable gate array (FPGA). The OSC FPGA creates Ethernet packets and sends them to a BCM or internal Gigabit Ethernet interface. The OSC traffic from two SFP 0/1 ports is multiplexed to processor Gigbait Ethernet interface (for example, port 3). The software uses the Gigabit Ethernet interface driver to transmit and receive OSC packets. The front panel RJ45 is also connected to the BCM switch. This interface can also be used for management. Both OSC and front panel RJ45 can be used simultaneously. The management packets from RJ45 interface are separated from OSC management packets. These can be sent over separate CPU GbE interface (for example, port 2 of BCM switch) by maintaining port 1 and port 2 in a VLAN.
Each optical ILA is connected to other ILAs and IPLC using optical ports. There are two optical ports for each optical ILA, designated as OSC A and OSC B. For IP connectivity over OSC, IPLC is used as a gateway. There is no direct IP connectivity between the optical ILA and external servers. The NMS server, such as Connectivity Services Director, sends the SNMP commands meant for an optical ILA to the Routing Engine of the PTX3000 router, with community string indicating the destination optical ILA. The mapping of optical ILA and SNMP community string is configured using the Junos OS CLI interface.