HP StorageWorks SAN Virtualization Services Platform Best Practices Guide (5697-0935, May 2011)

TIP: Test the failover procedure periodically.
Checking the DPM zoning
To ensure that the DPM recognizes all of the devices on its back-end (storage arrays and VSM
servers) and front-end (host HBAs) ports:
1. Open a Telnet session to the DPM.
2. Log in to the DPM as the administrator.
3. Type show debug wwpn and press Enter. The expected output is similar to this example.
Prt WWPN T FC_ID S
=== ================ = ====== =
0 50001fe100002001 L 010000 U
0 20fd00606951a322 R fffc01 D
0 210000e08b813001 R 010d00 U
0 50001fe100002002 L 010100 U
This output shows the WWPN of all of the ports that are known to the DPM. The Prt column
shows the port number on the DPM. The WWPN column shows the WWPN seen from this
DPM port. In the third column, the ports local to the system are designated with an L, and all
visible remote host/HBA or target/disk ports are designated with an R. The fourth column
shows the Fibre Channel ID. In the fifth column, U indicates the port is both visible and currently
logged in to the DPM; D indicates a switch port that is not currently active, which is normal.
4. Review this output to ensure that the host HBA port or the target device HBA port is visible
through the expected DPM port. These entries can be correlated with the name server entries
of the fabric switch to determine whether cabling or the zoning configurations are correct.
For each even numbered port (the front-end ports), ensure that the DPM can see the host HBAs
zoned with this port. Similarly, for each odd-numbered port (the back-end ports), ensure that
the DPM is connected to the VSM server and storage system.
Using CLI commands to monitor your environment
The HP StorageWorks SAN Virtualization Services Platform Data Path Module User Guide contains
many CLI commands you can use to monitor the environment. For example, to determine if your
configuration is symmetrical, compare the output of the show debug fcsstate command after
a reboot of both DPMs. The output should be identical, except for the Port:D_ID column. Output
differences may not be indicative of a misconfiguration, but any differences should be investigated
and understood. Here is an example of the show debug fcsstate command:
admin@ssp8400-g562->show debug fcsstate | fcs_state |
Port:D_ID Flags Links Inits Targs Ltargs Luns Rports Up/Dn
0:019000 033333f9 3 8 0 0 0 10 Up
1:019f00 033333f9 2 8 15 15 757 21 Up
2:01a000 033333f9 4 8 0 0 0 10 Up
3:01af00 033333f9 2 8 15 15 757 21 Up
4:019200 033333f9 3 6 0 0 0 8 Up
5:019d00 033333f9 3 8 18 18 228 24 Up
6:01a200 033333f9 3 6 0 0 0 8 Up
7:01ad00 033333f9 3 8 18 18 228 24 Up
8:000000 00000000 0 0 0 0 0 0 Down
9:000000 00000000 0 0 0 0 0 0 Down
10:000000 00000000 0 0 0 0 0 0 Down
11:000000 00000000 0 0 0 0 0 0 Down
12:000000 00000000 0 0 0 0 0 0 Down
13:000000 00000000 0 0 0 0 0 0 Down
14:000000 00000000 0 0 0 0 0 0 Down
15:000000 00000000 0 0 0 0 0 0 Down
Monitoring for errors 57