Reference Guide

Brocade Fabric OS Command Reference 459

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islShow

Displays interswitch link (ISL) information.

Synopsis islshow

Description Use this command to display the current connections and status of the interswitch link (ISL) for each port on a

switch. The command output includes the following information:

• Node world wide name (WWN)

• Domain ID

• Switch name

• ISL connection speed, if applicable

• Bandwidth

• Trunking enabled, if applicable

• QOS - QoS enabled, if applicable

• ENCRYPT - Encryption enabled, if applicable

• COMPRESS - Compression enabled, if applicable

• CR_RECOV - Credit recovery enabled, if applicable

• FEC -Forward Error Correction enabled, if applicable

When issued on a switch that is part of a logical fabric configuration, the islShow command displays logical

interswitch links (LISLs) along with regular ISLs. However, speed (sp) displays N/A for logical ports. The bandwidth

(bw) displayed is the sum of the bandwidth of all extended ISLs (XISLs) that form the LISL. A shared ISL (XISL)

connects the base switches and is shared by different logical fabrics. It allows devices to communicate with each

other within the logical fabric.

Connection speed is not applicable to LE_Ports or VE_Ports. For these port types, speed displays as "sp:-------".

Beginning with Fabric OS 7.1.0, this command will display the neighbor WWN information even when the ISL is

segmented during exchange link parameter (ELP) or post ELP segmentation phase. In a fabric that has switches

running Fabric OS 7.1.0 and pre-7.0.1 firmware, the neighbor information of the segmented links is displayed only

on switches running Fabric OS 7.1.0 firmware. In a rare situation when ELP is not exchanged between two switches,

the neighbor WWN information will be displayed only on the responder side that received ELP.