Deployment Guide

Fabric OS Command Reference 533
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islShow
2
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.
NOTES The execution of this command is subject to Virtual Fabric or Admin Domain restrictions that may be in
place. Refer to Chapter 1, "Using Fabric OS Commands" and Appendix A, "Command Availability" for
details.
OPERANDS None
EXAMPLES To execute islshow in a base fabric:
switch:user> islshow
1: 2->300 10:00:00:05:1e:43:00:00 100 DCX \
sp: 8.000G bw: 32.000G TRUNK QOS
2: 8-> 3 10:00:00:05:1e:41:8a:d5 30 B5300\
sp: 4.000G bw: 16.000G TRUNK QOS
3: 19-> 10 10:00:00:05:1e:41:43:ac 50 B300 sp:\
8.000G bw: 64.000G TRUNK