The software allows the use of transceivers and direct attach cables from any vendor, which means that the switch will bring up the port operationally when using any transceiver. Extreme Networks does not provide support for operational issues related to the use of non-Extreme Networks branded transceivers and direct attached cables used in the switches.
Extreme Networks supports SFP transceivers with the following part numbers: AA1419013–E5, AA1419014–E5, AA1419015–E5, and AA1419025–E5 to AA1419040–E5. However, Extreme Networks strongly recommends using the newer DDI versions of these SFP transceivers.
Note
Although VSP 8000 Series and VSP 7200 Series support 10 Gigabit and 40 Gigabit DAC cables in forgiving mode, in releases earlier than VOSS 4.2.1, the command output for show pluggable-optical-modules basic displays the corresponding vendor name rather than leaving the vendor name field blank.
The following table indicates where to find more information about optical transceivers and components.
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Compatibility for Extreme Networks SFP, SFP+, QSFP+, and QSFP28 transceiver modules with the VOSS-capable switches |
Extreme Optics website |
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Descriptions of Extreme Networks optical transceivers and components |
Use auto-negotiation to enable the device to automatically negotiate the best common data rate and duplex mode to use between two auto-negotiation-capable Ethernet devices.
When you use a 1 Gb SFP transceiver on a 10 Gb SFP+ port, ensure that auto-negotiation is enabled. Note, however, the following special considerations:
If you use 1 Gb SFP transceivers on a VSP 4450 Series switch that is connected to third-party switches, you must have auto-negotiation enabled at all times. This applies to SFP transceivers installed in either 1 Gb SFP ports or 10 Gb SFP+ ports.
Auto-negotiation is not supported for the VSP 7254XSQ. On the VSP 7254XSQ, if you are using a 1 Gb SFP module, the link can be established only when auto-negotiation is disabled at the remote device. Also note that, because the SFP+ ports on the VSP 7254XSQ support only 1 Gb and 10 Gb speeds, the 1000BASE-T SFP module (part no. AA1419043-E6 or 10070H) can operate only at 1 Gb.
For 1000BASE-T SFP transceivers, the best practice is to perform custom auto-negotiation at the remote native copper port. This can prevent connections from failing if the speed or duplex negotiation changes.
Forward Error Correction (FEC) is a method of obtaining error control in data transmission over an unreliable or noisy channel in which the source (transmitter) encodes the data in a redundant way by using an error correcting code (ECC). This redundancy enables a destination (receiver) to detect a limited number of errors and correct them without requiring a re-transmission.
For more information about FEC, see VOSS User Guide.