Cisco Systems DSC9148D8G48PK9 manual SFP Transmitter Types, SFP Transmitter Acronym Definitions

Chapter 2 Configuring Interfaces

Information About Interfaces

The bit errors can occur for the following reasons:

•Faulty or bad cable.

•Faulty or bad GBIC or SFP.

•GBIC or SFP is specified to operate at 1 Gbps but is used at 2 Gbps.

•GBIC or SFP is specified to operate at 2 Gbps but is used at 4 Gbps.

•Short haul cable is used for long haul or long haul cable is used for short haul.

•Momentary sync loss.

•Loose cable connection at one or both ends.

•Improper GBIC or SFP connection at one or both ends.

A bit error rate threshold is detected when 15 error bursts occur in a 5-minute period. By default, the switch disables the interface when the threshold is reached. You can enter a shutdown and no shutdown command sequence to re-enable the interface.

You can configure the switch to not disable an interface when the threshold is crossed. By default, the threshold disables the interface.

SFP Transmitter Types

The small form-factor pluggable (SFP) hardware transmitters are identified by their acronyms when displayed. Table 2-5defines the acronyms used for SFPs.

The small form-factor pluggable (SFP) hardware transmitters are identified by their acronyms when displayed in the show interface brief command. If the related SFP has a Cisco-assigned extended ID, then the show interface and show interface brief commands display the ID instead of the transmitter type. The show interface transceiver command and the show interface fc slot/port transceiver command display both values for Cisco-supported SFPs. Table 2-5defines the acronyms used in the command output (see the “Displaying Interface Information” section on page 2-42).

		Table 2-5	SFP Transmitter Acronym Definitions
		Definition		Acronym
		Standard transmitters defined in the GBIC specifications
		short wave laser		swl
		long wave laser		lwl
		long wave laser cost reduced		lwcr
		electrical		elec
		Extended transmitters assigned to Cisco-supported SFPs
		CWDM-1470		c1470
		CWDM-1490		c1490
		CWDM-1510		c1510
		CWDM-1530		c1530
		CWDM-1550		c1550
		CWDM-1570		c1570
	Cisco MDS 9000 Family NX-OS Interfaces Configuration Guide
2-12				OL-29284-01, Release 6.x