HP StorageWorks 8/80 HP StorageWorks Fabric OS 6.1.x administrator guide (5697 - Page 325

To check for Fibre Channel connectivity problems: 1. On the edge Fabric OS switch, make sure that the source and destination devices are properly configured in the LSAN zone before entering the fcPing command. This command performs the following functions: • Checks the zoning configuration for the two ports specified. • Generates an ELS (extended link service) ECHO request to the source port specified and validates the response. • Generates an ELS ECHO request to the destination port specified and validates the response. switch:admin> fcping 0x060f00 0x05f001 Source: 0x60f00 Destination: 0x5f001 Zone Check: Zoned Pinging 0x60f00 with 12 bytes of data: received reply from 0x60f00: 12 bytes time:501 usec received reply from 0x60f00: 12 bytes time:437 usec received reply from 0x60f00: 12 bytes time:506 usec received reply from 0x60f00: 12 bytes time:430 usec received reply from 0x60f00: 12 bytes time:462 usec 5 frames sent, 5 frames received, 0 frames rejected, 0 frames timeout Round-trip min/avg/max = 430/467/506 usec Pinging 0x5f001 with 12 bytes of data: received reply from 0x5f001: 12 bytes time:2803 usec received reply from 0x5f001: 12 bytes time:2701 usec received reply from 0x5f001: 12 bytes time:3193 usec received reply from 0x5f001: 12 bytes time:2738 usec received reply from 0x5f001: 12 bytes time:2746 usec 5 frames sent, 5 frames received, 0 frames rejected, 0 frames timeout Round-trip min/avg/max = 2701/2836/3193 usec 2. Regardless of the device's zoning configuration, the fcPing command sends the ELS frame to the destination port. A destination device can take any one of the following actions: • Send an ELS Accept to the ELS request. • Send an ELS Reject to the ELS request. • Ignore the ELS request. There are some devices that do not support the ELS ECHO request. In these cases, the device will either not respond to the request or send an ELS reject. When a device does not respond to the ELS request, further debugging is required; however, do not assume that the device is not connected. For details about the fcPing command, see the Fabric OS Command Reference. Upgrade and downgrade considerations If you downgrade to a version of Fabric OS that does not support FC-FC Routing Services, then your FC-FC routing configuration will be lost. Brocade recommends that you enter the configUpload command to save your FC-FC routing configuration before performing any downgrades. For further instructions on downgrading, refer to "Installing and maintaining firmware" on page 23. Interoperability with legacy FCR switches The following interoperability considerations apply when administering legacy FCR switches in the same BB fabric as switches supporting Fabric OS v5.2.0 or later: • When a legacy switch is connected to the backbone fabric, a RASLog message is issued indicating that the capability of the BB fabric is lower as legacy FCR switches (those with XPath OS and Fabric OS 5.1) support lower capability limits. • If an XPath OS switch joins the BB fabric, a RASLog message is issued indicating that the backbone-to-edge fabric is not supported with the XPath OS switch. Fabric OS 6.1.x administrator guide 325