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Supported transceivers
The VDX 6740 provides up to 48 ports that support 1, 8, or 10 GbE optical SFP+ Extreme-branded Ethernet SFP+ optical or copper
transceivers. These ports also support SFP+ direct-attached Twinax copper and active and passive optical cables.
VDX 6740 ports also support 10 GbE tunable SFP+ (TSFP+) transceivers. If used, TSFP+ transceivers must be installed in the port at
each end of a link and "tuned" to the same wavelength. If not, the link may come online, but operation may be unpredictable. If
wavelength difference exceeds a specified limit, a RASLOG message occurs and the port is taken offline. You can configure wavelengths
for installed transceivers using channel numbers from 1 to 102 that correspond to wavelengths from 1568.77 to 1528.38 nm using
the tunable-optics sfpp channel channel number command. For details on using this and related commands, refer to the "Tunable SFP+
optics" section of the Extreme Network OS Management Configuration Guide.
The VDX 6740T provides 48 ports with 10G Base-T RJ-45 connectors for copper twisted-pair only.
Both the VDX 6740 and VDX 6740T provide four ports that support 40 GbE QSFP+ transceivers. These ports support SFP breakout
mode (also referred to 4x10 GbE breakout mode) using 4x10 GbE breakout cables. Fibre Channel FlexPort operation is supported only
when ports are in 40 GbE mode using optical 4x16G QSFP+ short wavelength transceivers. On the VDX 6740T, the 40 GbE ports also
support 10 GbE SFP+ transceivers when the QSA Adapter is used.
For details on supported transceivers for all VDX 6940 models, refer to the ExtremeSwitching VDX Transceiver Support Matrix. Access
this matrix on the
www.extremenetworks.com
then select Transceiver Modules. Also contact your Extreme Networks representative for current transceiver support and ordering
information.
•
ExtremeSwitching VDX Transceiver Support Matrix
•
Extreme Fibre Channel Transceiver Support Matrix
DANGER
All fiber-optic interfaces use Class 1 lasers.
DANGER
Laser Radiation. Do Not View Directly with Optical Instruments. Class 1M Laser Products.
Extreme Networks inter-switch link trunks
In VCS mode, unless specifically disabled, inter-switch link (ISL) Extreme Networks trunking between adjacent devices is automatic. All
ports must be in the same port group and must be configured at the same speed. There is a limit of sixteen ports per trunk group. No
separate licensing is required. Refer to the illustrations below for the exact port groups. On the VDX 6740T, ports in groups 3 and 3A, as
well as port groups 4 and 4A, cannot be trunked together. However, these ports can be trunked on the VDX 6740 when the 40 GbE
QSFP ports are configured in breakout mode. VDX 6740T 1GbE ports cannot be trunked.
NOTE
If connections are made to 16 different switches, only eight ports will be trunk ports while the other eight ports will be normal
ISL ports.
For instructions on configuring breakout mode and Extreme Networks trunking, refer to the Extreme Network OS Management
Configuration Guide.
ExtremeSwitching VDX 6740 Hardware Installation Guide
9036108-00
website by selecting Product and Services from the menu, scroll down Transceivers, and
Product features
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