Reference Guide

∙ There is no HA support for D_Port test options and results. Any information from a previous test is lost following a failover or
reboot.
∙ During an HA failover reboot on one side of the link, the link is reinitialized and may restart the test. However, the test cannot
proceed if the remote port is not ready to proceed further (the remote port may already be done with the D_Port test and in the
final state). In such a case, the test will eventually fail with a “Remote port not ready” message. Restarting the test from either
side will recover the port.
8-Gbps LWL and ELWL SFP transceiver limitations for D_Ports
Consider the following 8-Gbps LWL and ELWL SFP transceiver limitations when using D_Ports:
∙ On these transceivers, only link traffic tests can be run. Electrical and optical loopback tests are not available on 8-Gbps SFP
transceivers.
∙ On these transceivers, if the cable length is less than or equal to 100 meters, the length is displayed as “unknown”. If the cable
length is greater than 100 meters, the length is displayed accurately.
Topology 1: ISLs
The following figure illustrates inter-switch links (ISLs) that connect multiple switches through a pair of chassis. The letter E represents
E_Ports to be configured as D_Ports.
FIGURE 59 ISLs connecting multiple switches and chassis
Note the following:
∙ Static-static, static-dynamic, and on-demand-dynamic D_Port modes are supported on the ISLs.
∙ For configuration details, refer to "Using_D_Port_without_HBAs" in this chapter.
Diagnostic Port
Brocade Fabric OS Administration Guide, 8.0.1
53-1004111-02 421