Rate of ESCON services

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The rate of ESCON services is 200 Mbit/s.

Other related questions:
Wavelength recommendations for low-rate and high-rate services
For optical-layer ASON, shorter wavelengths are recommended for low-rate services, and longer wavelengths are recommended for high-rate services. This ensures better performance for optical-layer services.

Introduction to ESCON and FICON and their differences
Fibre Connection (FICON) is a high-performance I/O interface standard. It is mainly used for high-speed access and storage access services. FICON devices use ANSI-based fiber channels �?physical and signaling interfaces (FCPH). FCPH interfaces define the physical layer signaling, media, and transmission rates of optical fiber channels. Each FICON channel supports more than 4000 I/O operations per second, and the rate of each channel can reach the capacity of eight ESCON channels. The link rate of FICON channels is 100 Mbit/s, and the link rate of ESCON links is 17 Mbit/s. Generally, the FICON direct transmission distance can reach 10 km, and even can reach 20 km in some cases. Enterprise Systems Connection (ESCON) is an IBM standard. It is used for interconnection between S/390 computers, and interconnection between S/390 computers, auxiliary storage devices, local workstations, other devices that use optical fiber technologies, and switches that are called ESCON directors with dynamic changes. In IBM server systems, the interconnections of local hardware units are called channel connections, which are used to distinguish from remote connections. ESCON fibers can extend the connections between local workstations and servers to 60 km (about 37.3 nautical miles). The data transmission rate of links can reach 200 Mbit/s. In some cases, the data transmission rate is lower than 200 Mbit/s for adaptation to channel interfaces. ESCON, FibreChannel, and SCSI are three technologies for SANs.

Service rate limit for GE services on the TOM board
The TOM board does not support port bandwidth limit. All OTN boards do not support this function. The function is supported only by the service boards that support the L2 processing capability, such as TEM28 and LEM24.

PPPoE dialup service is unavailable and the network access rate is low
Root cause: 1. The AR router is tested. The test result shows that the router can normally forward packets, and the forwarding bottleneck is reached sometimes. 2. According to analysis of obtained packets, the TCP connection has been established and enters the data obtaining phase. However, the device receives RST packets (No. 15136 and No. 15137) from the Internet. As a result, the TCP connection is torn down. Procedure: 1. The networking where the PC is connected to the Internet through the router is tested and services are also abnormal. 2. The networking where the PC is connected to the Internet is tested and no fault occurs. Therefore, the PC works properly. 3. Run the tcp adjust-mss command to set the TCP MSS of the dialup interface to 1400, 1200, or 900. The fault persists. 4. In the networking where the PC is connected to the Internet through the router, services are still abnormal. Run the display health and display interface commands. The command outputs show that the CPU usage and uplink bandwidth usage of the interface are normal, and the interface works in full-duplex mode through negotiation. 5. Run the display fe slot 0 fe-id 0 fwd-status all command to check the packet forwarding status of the device. No severe packet loss occurs. 6. Run the display session number command to check the number of session entries on the device. In peak hours, the number of session entries reaches 16K. 7. Optimize NAT deployment on the intranet interface so that the number of session entries is smaller than the maximum value and users can normally access the Internet.

Lowest and highest rates of services that can be received at the client side of a TOM board
The client side of the TOM board supports the following services and rates: FE: Ethernet service at a rate of 125 Mbit/s GE: Ethernet service at a rate of 1.25 Gbit/s, supporting GE optical signals and electrical signals OTU1: OTN service at a rate of 2.67 Gbit/s STM-1/OC-3: SDH/SONET service at a rate of 155.52 Mbit/s STM-4/OC-12: SDH/SONET service at a rate of 622.08 Mbit/s STM-16/OC-48: SDH/SONET service at a rate of 2.5 Gbit/s FC100: SAN service at a rate of 1.06 Gbit/s FC200: SAN service at a rate of 2.12 Gbit/s FICON: SAN service at a rate of 1.06 Gbit/s FICON Express: SAN service at a rate of 2.12 Gbit/s HD-SDI: high-definition digital TV service at a rate of 1.49 Gbit/s DVB-ASI: digital TV service at a rate of 270 Mbit/s SDI: digital TV service at a rate of 270 Mbit/s ESCON: SAN service at a rate of 200 Mbit/s FDDI: SAN service at a rate of 125 Mbit/s

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