Brocade Communications Systems 8 Troubleshooting And Diagnostics Manual page 30

2
FC-FC routing connectivity
The fcPing command sends a Fibre Channel ELS ECHO request to a pair of ports. It performs a
zone check between the source and destination. In addition, two Fibre Channel Extended Link
Service (ELS) requests will be generated. The first ELS request is from the domain controller to the
source port identifier. The second ELS request is from the domain controller to the destination port
identifiers. The ELS ECHO request will elicit an ELS ECHO response from a port identifier in the
fabric and validates link connectivity.
Use the fcPing command to validate link connectivity to a single device or between a pair of
devices.
ATTENTION
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.
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:
•
•
•
switch:admin> fcping 0x060f00 0x05f001
Source:
Destination:
Zone Check:
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
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:
•
•
•
For details about the fcPing command, see the Fabric OS Command Reference.
16
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.
0x60f00
0x5f001
Zoned
Send an ELS Accept to the ELS request.
Send an ELS Reject to the ELS request.
Ignore the ELS request.
Fabric OS Troubleshooting and Diagnostics Guide
53-1001769-01