Routing Echo; Upgrade And Downgrade Considerations - HP AA979A - StorageWorks SAN Switch 2/8V Administrator's Manual

Routing ECHO

The FC-FC Routing Service enables you to route the ECHO generated when an fcPing command is
issued on a switch, providing fcPing capability between two devices in different fabrics across the 400
MP Router or 4/256 SAN Director with a B-Series MP Router blade.
To check for Fibre Channel connectivity problems
On the edge Fabric OS switch
1.
configured in the LSAN zone before entering the fcPing command, which:
• Checks the zoning configuration for the two ports specified.
• Generates an ELS (Extended Link Service frame) 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_06> 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
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 Manual.

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. HP recommends that you enter the configUpload command to save
your FC-FC routing configuration before performing any downgrades.
If you have a 4/256 SAN Director with a B-Series MP Router blade configured using chassis option 5 with
the blade powered on and you attempt to downgrade to an earlier version of the Fabric OS, the
downgrade will not occur until after you power off and remove the B-Series MP Router blade. If you attempt
to swap out the FR4- 1 8i blade with another (for example, the FC4- 1 6 or FC4-32), the port's configuration
will be cleared; however, all other port configurations are retained.
226 Using the FC-FC routing service
, make sure that the source and destination devices are properly
0x60f00
0x5f001
Zoned