Changes between Version 6 and Version 7 of Tutorials/Optical/Tutorial1
- Timestamp:
- Jun 8, 2019, 11:36:05 PM (5 years ago)
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Tutorials/Optical/Tutorial1
v6 v7 58 58 Fig.1 Logical Topology of Experiment_1 59 59 60 Experiment consist in changning the light path from ToR1<-->ToR2 to ToR1<-->ToR3, representing changing of the light path in C-RAN when “Client” wants to move its baseband processing from “Edge Cloud” to “Central Cloud”.60 Experiment consists in changing the light path from ToR1<-->ToR2 to ToR1<-->ToR3, representing changing of the light path in C-RAN when “Client” wants to move its base-band processing from “Edge Cloud” to “Central Cloud”. 61 61 62 62 Experiment includes 3 servers: … … 103 103 ---- 104 104 = Setting Up Optical Topology = 105 Setting up an optical topology consists in connecting ROADMs accordingly to the needs of experiment. ROADMs need to be connected correctly to each other and to ToR switch. All interconnections are reali sed by Calient S320 Switch.105 Setting up an optical topology consists in connecting ROADMs accordingly to the needs of experiment. ROADMs need to be connected correctly to each other and to ToR switch. All interconnections are realized by Calient S320 Switch. 106 106 107 107 [[Image(COSMOS_Optical.png)]][[Image(32_AoA.png)]] … … 111 111 Calient Switch S320 has ports physically connected to ROADMs, ToR, Prof. Zussman’s lab and 3 loopback connections. All ports are designated in the Fig.2 Physical Optical Interconnections. 112 112 113 In order to support the Experiment_1 logical connections and realise physical distance of Edge Cloud from Central Cloud, one could pass through a loop going to 32 Avenue of the Americas of 22km,and organize Client port Connections as Next:113 In order to support the Experiment_1 logical connections and to realize emulate real distance between Edge Cloud an Central Cloud, one could choose to pass the optical signal through the loop of 22 km passing by 32 Avenue of the Americas, NYC; and organize Client port Connections as Next: 114 114 115 115 ||ID||||Ports Connection||||Devices Connection||||Comment|| 116 116 ||1||||1.1.1-1.4.1||||ROADM1.port_1 to ROADM2.port_1||||Forming pass through connection between ROADM1 and ROADM2|| 117 117 ||2||||1.1.2-5.7.1||||ROADM1.port_2 to ToR.port_29||||Connecting transceiver on ToR on port 29 to ROADM1 add/drop port 2|| 118 ||3||||1.4.8-5.8.1||||ROADM2.line to 32AoA.P1_P2||||Connecti online port or ROADM2 to port P1_P2 of a 22 km fiber loop going through 32 AoA.||118 ||3||||1.4.8-5.8.1||||ROADM2.line to 32AoA.P1_P2||||Connecting line port or ROADM2 to port P1_P2 of a 22 km fiber loop going through 32 AoA.|| 119 119 ||4||||1.7.2-5.7.3||||ROADM3.port_2 to ToR.port_31||||Connecting transceiver on ToR on port 31 to ROADM3 add/drop port 2|| 120 ||5||||1.7.4-5.5.1||||ROADM3.port_4 to Loopback.port_1||||Connecting ROADM3 add/drop port 4 to a loop back connection. Is needed to provide “Snake” connection (cf. Setting “Snake” Connection)||120 ||5||||1.7.4-5.5.1||||ROADM3.port_4 to Loopback.port_1||||Connecting ROADM3 add/drop port 4 to a loop-back connection. Is needed to provide “Snake” connection (cf. Setting “Snake” Connection)|| 121 121 ||6||||2.2.8-1.1.8||||ROADM4.line to ROADM1.line||||Connecting line ports of ROADM1 and ROADM4|| 122 122 ||7||||5.7.4-2.2.2||||ROADM4.port_2 to ToR.port_32||||Connecting transceiver on ToR on port 32 to ROADM4 add/drop port 2.|| … … 128 128 ---- 129 129 = ROADMs Configuration = 130 All of these configurations can be performed by Python scripts developed to work with the COSMOS test bed. The Python commands send NETCONF commands to the ROADM.130 All of these configurations can be performed by Python scripts developed to work with the COSMOS test-bed. The Python commands send NETCONF commands to the ROADM. 131 131 132 132 == Setting “Snake” Connection == 133 In order to correct operation of the ROADMs there always has to be a light passing through Line In port of each ROADMs. That is why there is a dedicated transceiver (tengigabitethernet 1/33/1 on ToR) that sends light through all ROADMs passes through loopback connection on Calient S320 (port 5.5.1) and is redirected back to be received on the same transceiver. Essentially that means that transceiver send and receive the same light emitted. 134 133 Correct ROADM operation requires Line In port of a ROADM to always receive a light. That is why there is a dedicated transceiver (tengigabitethernet 1/33/1 on ToR) that sends light through all ROADMs by passing through loop-back connection on Calient S320 (port 5.5.1) and redirecting back, so the light is received on the same transceiver. 135 134 This kind of connection is called “Snake”. 136 135
