This chapter discusses the following:
This section discusses the following:
See also “Change the Brocade Password when Prompted” in Chapter 2.
All Brocade switches contained within the SAN fabric must have the appropriate Brocade firmware. For the currently supported firmware, see the CXFS general release notes.
If the current firmware level of the switches must be upgraded, please contact your local SGI service representative or customer support center.
The Brocade switch must be configured so that its Ethernet interface is accessible (using telnet) from all CXFS administration nodes. The fencing network connected to the Brocade switch must be physically separate from the private heartbeat network.
 | Caution: The admin state must be free in order for I/O fencing to succeed. |
Switches using 4.x.x.x or later firmware permit multiple telnet sessions. However, CXFS I/O fencing requires a telnet lockout for global mutual exclusion when a fencing race occurs. Therefore, you must configure these switches to set the maximum allowed simultaneous telnet sessions for the admin user to 1. (Brocade switches running 3.x.x.x firmware are shipped with the required restrictions configured by default).
To verify the firmware version, log into the switch as user admin and use the version command, as shown in the following example:
workstation% telnet brocade1 Trying 169.238.221.224... Connected to brocade1.example.com Escape character is '^]'. Fabric OS (tm) Release v2.6.0d login: admin Password: brocade1:admin> version Kernel: 5.4 Fabric OS: v2.6.0d <== Firmware Revision Made on: Fri May 17 16:33:09 PDT 2002 Flash: Fri May 17 16:34:55 PDT 2002 BootProm: Thu Jun 17 15:20:39 PDT 1999 brocade1:admin> |
To verify the Brocade license, log into the switch as user admin and use the licenseshow command, as shown in the following example:
brocade:admin> licenseshow
dcRyzyScSedSz0p:
Web license
Zoning license
SES license
Fabric license
SQQQSyddQ9TRRdUP:
Release v2.2 license |
You must limit the maximum allowed simultaneous telnet session
To limit the maximum allowed simultaneous telnet sessions for the admin user to 1 on the Brocade 200E/3250/3252/3850/3852/3900/4100/4900/5000, do the following:
Connect to the switch via the telnet command and log in as root.
Issue the sync command to avoid filesystem corruption:
# sync
Edit the /etc/profile file to change the max_telnet_sessions from 2 to 1 and place the information in a new file. For example:
# cd /etc # sed -e 's/max_telnet_sessions=2/max_telnet_sessions=1/' profile >profile.new
Distribute the edited profile file to both partitions on both central processors. For example:
# cp profile.new profile # cp profile.new /mnt/etc/profile
Issue the sync command again to avoid filesystem corruption:
# sync
To limit the maximum allowed simultaneous telnet sessions for the admin user to 1 on the Brocade 12000/24000/48000, do the following:
Connect to the switch via the telnet command and log in as root.
Use the haShow command to make sure that both central processors are up. This is indicated by the message Heartbeat Up within the output of the haShow command. If it is not up, wait a few minutes and run haShow again to check for the status.
Issue the sync command on the filesystems to avoid filesystem corruption:
# rsh 10.0.0.5 sync # rsh 10.0.0.6 sync
Edit the /etc/profile file to change the max_telnet_sessions from 2 to 1 and place the information in a new file. For example:
# cd /etc # sed -e 's/max_telnet_sessions=2/max_telnet_sessions=1/' profile >profile.new
Distribute the new profile to both partitions and central processors. For example:
# rcp /etc/profile.new 10.0.0.5:/etc/profile # rcp /etc/profile.new 10.0.0.5:/mnt/etc/profile # rcp /etc/profile.new 10.0.0.6:/etc/profile # rcp /etc/profile.new 10.0.0.6:/mnt/etc/profile
Issue the sync command again to avoid filesystem corruption:
# rsh 10.0.0.5 sync # rsh 10.0.0.6 sync
To change Brocade Fibre Channel cable connections used by nodes in the CXFS cluster, do the following:
Cleanly shut down CXFS services on the nodes affected by the cable change. Use the CXFS GUI or cxfs_admin.
Rearrange the cables as required.
Restart CXFS services.
Reconfigure I/O fencing if required. You must perform this step if I/O fencing is enabled on the cluster and if you added/removed any Brocade switches. You must use the CXFS GUI or cxfs_admin to add or remove switches from the CXFS configuration as required.
If any CXFS client nodes are connected to a new (or different) Brocade switch, restart CXFS services on those nodes. This will ensure that the CXFS administration servers can correctly identify the Brocade ports used by all clients.
All QLogic Fibre Channel (FC) switches contained within the SAN fabric must have the appropriate QLogic firmware installed, as shown in the CXFS general release notes.
For more information, see the QLogic SANbox2-64 Switch Management User's Guide.
| Caution: The admin state is required for I/O fencing. To avoid interference with fencing, release admin mode as soon as possible. Do not leave admin mode sessions open. |
The default port configuration on a QLogic 9200 FC switch is not compatible with the CXFS environment. To use the appropriate port configuration, change the following parameters:
| LinkSpeed | Set to the appropriate value, such as 2 for 2 GB/s. (In some cases, Auto does not function properly.) | |
| PortType | Enter the appropriate type, usually F. (You cannot use the GL autonegotiated mode.) | |
| NoClose | Set to True to prevent the Fibre Channel circuit from shutting down during a host reboot. | |
| IOStreamGuard | Set to Enable if the port is connected to a host HBA or to Disable if the port is connected to a storage HBA. (You cannot use Auto mode because most HBAs cannot negotiate this.) |
To modify these parameters, use the admin command. For example, for a port connected to an SGI Altix:
SANbox #> admin start SANbox (admin) #> config edit The config named default is being edited. SANbox (admin-config) #> set config port 31 A list of attributes with formatting and current values will follow. Enter a new value or simply press the ENTER key to accept the current value. If you wish to terminate this process before reaching the end of the list press 'q' or 'Q' and the ENTER key to do so. Configuring Port Number: 31 ------------------------ AdminState (1=Online, 2=Offline, 3=Diagnostics, 4=Down) [Online] LinkSpeed (1=1Gb/s, 2=2Gb/s, 4=4Gb/s, A=Auto) [Auto ] 2 PortType (GL / G / F / FL / Donor) [GL ] F SymPortName (string, max=32 chars) [Port31] Altix45 ALFairness (True / False) [False ] DeviceScanEnable (True / False) [True ] ForceOfflineRSCN (True / False) [False ] ARB_FF (True / False) [False ] InteropCredit (decimal value, 0-255) [0 ] ExtCredit (dec value, increments of 15, non-loop only) [0 ] FANEnable (True / False) [True ] AutoPerfTuning (True / False) [True ] MSEnable (True / False) [True ] NoClose (True / False) [False ] True IOStreamGuard (Enable / Disable / Auto) [Auto ] Enable PDISCPingEnable (True / False) [True ] Finished configuring attributes. This configuration must be saved (see config save command) and activated (see config activate command) before it can take effect. To discard this configuration use the config cancel command. .... SANbox (admin-config) #> config save The config named default has been saved. SANbox (admin) #> config activate The currently active configuration will be activated. Please confirm (y/n): [n] y SANbox (admin) #> admin end SANbox #> show config port 31 Configuration Name: default ------------------- Port Number: 31 ------------ AdminState Online LinkSpeed 2Gb/s PortType F SymbolicName Altix45 ALFairness False DeviceScanEnabled True ForceOfflineRSCN False ARB_FF False InteropCredit 0 ExtCredit 0 FANEnabled True AutoPerfTuning True MSEnabled True NoClose True IOStreamGuard Enabled PDISCPingEnabled True |