Installation Guide

Table Of Contents

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.

Table 96 lists cables and transceivers that require the use of V400 alternative-configuration:

Table 96: 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 ExtremeXOS 30.7

Command Reference Guide.

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.

• Recommendations about which switches should be the stack master and backup.

• Information about the supported versions of ExtremeXOS for every combination.

To use the Stacking Tool, follow these steps.

1. Open the Stacking Tool (https://stackingtool.extremenetworks.com/StackingTool/) in a web

browser.

Note

The Stacking Tool is also available in the Support Tools section of the Extreme Portal.

Using the Extreme Stacking Tool Building Stacks

212 ExtremeSwitching Hardware Installation Guide