Tag :: Transceiver

Groups of front panel ports can be controlled by one power controller module. Power faults can often be detected by the power controller, which causes loss of power for all ports controlled by the power controller. The fault can be triggered by inrush current during insertion or removal of transceivers. A broken transceiver can cause a fault too.

Common Management Interface Specification (CMIS) defines, starting with revision 4.0, a standard mechanism for managing the firmware of compliant transceivers. This mechanism allows for transceivers’ firmware to be updated without having to remove the transceiver from the switch. Firmware updates may be necessary in a testing or production environment to resolve potential firmware bugs. Some transceivers may also support firmware management operations in a hitless manner (without impacting traffic).

The feature allows a simulated transceiver removal, without physically touching the module. This can be used for

Configuration of arbitrary combinations of speeds on subinterfaces is being restricted on 800G CMIS Arista transceivers. This feature restricts configuring only uniform sets of speeds on applicable transceivers. This affects Arista-branded 800G active optical transceivers.

The SFP-10G-RA-1G-LX and SFP-10G-RA-1G-SX transceivers are rate adapting SFP+ transceivers with internal clause 37 auto-negotiation (AN) support. The transceiver host interface is 10G XFI and the module rate adapts in the egress direction from 10G to 1G before transmitting data on the attached fiber. In the ingress direction it rate adapts the received 1G data to 10G before sending to the host switch. This allows 1000BASE-LX and 1000BASE-SX support on switches which do not natively support 1G operation.

This feature introduces support for the SFP-10G-MRA-T SFP transceiver. This is a rate adapting transceiver, meaning it can convert the system side interface to a lower rate on the line side. This module can provide 100M, 1G, 2.5G, and 5G support over BASE-T media for Arista switches that do not natively support these data rates.

This feature introduces the ability to define matching rules to configure transceiver tuning on a switch. This is useful when a particular collection of transceivers are known to require tuning values which differ from EOS defaults.

A secure erase is generally defined as a command (or set of commands) that deliberately, permanently and irreversibly remove/destroy the data stored on a storage device, rendering that data unrecoverable. This feature securely erases the flash and optional SSD storage device(s) within an Arista switch. Specifically, it will secure erase the storage devices whose partitions mount to /mnt/crash, /mnt/drive, and /mnt/flash (as applicable). Then, it repartitions these storage devices and re-creates the filesystems for each of their partitions. In other words, the partition table of each storage device will be the exact same as before this secure erase procedure (MBR gets destroyed during a secure erase); each partition will have the same filesystem type and partition label, and be mounted to the same mount point with the same options. This makes it possible to boot EOS again; simply install a new boot-config and EOS SWI, then reboot (which can be done through Aboot/fullrecover).

This feature adds support for viewing the Digital Optical Monitoring (DOM) parameters for the optics that support

In an optical transceiver, electrical signals leaving the switch are converted to optical signals in the transmit path. Optical signals arriving at the transceiver are converted to electrical signals that enter the switch in the receive path. At the point of conversion, an automatic decision can be made to turn off (squelch) output when the input level drops below a certain threshold of usability (usually, LOS condition.) This is referred to as automatic squelching.