Selecting Stacking Cables
Stacking connections using the native stacking ports require stacking cables that are specific to the
type of stacking port. These cables are available from Extreme Networks in lengths from 0.5 meter to
100 meters.
Note
For the most recent information about available cables, contact your Extreme Networks sales
representative or refer to the
website.
Caution
Use of non-recommended cables or optics could cause stack instability.
Alternative Configuration for Optics on X590, X690, X695, and X870 Switches
To use certain fiber cables and optical transceivers for stacking on X590, X690, X695, and X870
switches, you must use the
V400 alternative-configuration
option on the
configure
stacking-support
command. This option sets the stacking ports to 100 Gb, enables pre-emphasis,
and enables error correction using IEEE 802.3bj Clause 91 RS-FEC.
lists cables and transceivers that require the use of
V400 alternative-configuration
:
Table 16: Cables and Transceivers that Require Alternative Configuration
Part Number
Cable or Transceiver
10401
100Gb SR4 QSFP28 MMF transceiver
10403
100Gb LR4 QSFP28 transceiver
10404
100Gb CWDM4 QSFP28 SMF transceiver
10405
100Gb PSM4 QSFP28 SMF transceiver
10441
QSFP28 x 4SFP28 (4x25Gb) active optical breakout cable - 5 meters
10442
QSFP28 x 4SFP28 (4x25Gb) active optical breakout cable - 7 meters
10443
QSFP28 x 4SFP28 (4x25Gb) active optical breakout cable - 10 meters
10444
QSFP28 x 4SFP28 (4x25Gb) active optical breakout cable - 20 meters
For details about the
configure stacking-support
command, see the
Using the Extreme Stacking Tool
The Extreme Stacking Tool provides an easy way to plan your stack. As you select various switch
models and stacking methods, the tool shows you:
•
What switch models can be stacked together and which cannot.
•
Whether switching methods – for example, SummitStack-V and SummitStack-V80 (supported in
EXOS 30.1 and prior releases only) – are compatible with the selected switches.
•
Statistics showing the routing options that are available with every stack combination.
Selecting Stacking Cables
Building Stacks
64
ExtremeSwitching 5420 Series Hardware Installation Guide