Monday, 18 August 2014

Install Cisco MDS9124 / MDS9148 additional FC port licenses

Install Cisco MDS9124  / MDS9148 additional FC port licenses
Login to Cisco License portal at
Use the PAK (Product Authorization Key) number that came with the printed card beside the switch or SFPs.
To obtain the license, you will be required to provide the switch serial number along with the PAK. Use the following procedure to obtain the switch serial number:
Login to the switch command console
Issue the “show license host” command. The serial number is the character string after the “=” sign.
For example:
CISCOSWITCH# show license host
License hostid: VDH=FOX12345ABC
Here, the switch serial number is “FOX12345ABC”
Follow the wizard in Cisco’s web site to obtain the license. It will arrive to your email mailbox, or it can be downloaded directly from this portal.

Login to Cisco device manager app as admin
Go to the menu Admin, Flash Files
Click Copy …
Direction: Server - > Switch
Protocol: tftp
Server Address: Type in the IP address of the tftp server where the “.lic” file is
Server file: locate the file in the tftp server, but remove all the path, except for the filename. This is because it needs to be relative to the tftp server root
Switch File: use “bootflash:/FILENAME.lic”, being FILENAME.lic the same name as the original file.
Most of the parameters here will be auto-populated, but need to be verified.
Click Apply.
Then Close and refresh the previous window. The file should be listed in the bootflash:
Click Close
At this point, there are two ways to install the license in the switch:
Option 1, using the command line
Login to the switch using a ssh session and type the command to activate the license as follows:
CISCO-MDS9124 login: admin
Cisco Storage Area Networking Operating System (SAN-OS) Software
TAC support:
Copyright (c) 2002-2007, Cisco Systems, Inc. All rights reserved.
The copyrights to certain works contained herein are owned by
other third parties and are used and distributed under license.
Some parts of this software may be covered under the GNU Public
License or the GNU Lesser General Public License. A copy of
each such license is available at and
CISCO-MDS9124# install license bootflash:FILENAME.lic
Installing license .......done
CISCO-MDS9124# exit

Option 2, using the device manager:
Go to the Cisco device manager and goto admin, Licenses
Click the Install tab and click the arrow at the end of the “URI” box. It will show a drop down list of the license files present in the switch. Select the one that was recently transferred to the switch.
Both boxes, URI and Target Filename will be automatically populated
Click Install
After a few seconds the Status should say “success”

Verify that the licenses were installed properly:
Go to the Cisco device manager and goto admin, Licenses
The additional licenses should show up in the Features tab, Installed Count column

And on the main window, also the ports should be activated.

Tuesday, 12 August 2014

Setting up slewing NTP option in Linux for Oracle Database

Many times while installing/configuring Oracle Cluster, DBA’s  receive the following error message.
Checking NTP daemon command line for slewing option “-x”Check: NTP daemon command line
Node Name                     Slewing Option Set?  ————————————  ————————
vcsnode1                         no
vcsnode2                         no
Result:NTP daemon slewing option check failed on some nodes PRVF-5436 : The NTP daemon running on one or more nodes lacks the slewing option “-x”Result: Clock synchronization check using Network Time Protocol(NTP) failed
To fix this error, slewing needs to be configured.
Follow the below steps to configure slewing in Linux.
  • Stop ntpd daemon using the following command.
[root@vcsnode1 ~]# service ntpd stop
Shutting down ntpd:                                        [  OK  ]
[root@vcsnode1 ~]#
  • Edit /etc/sysconfig/ntpd file.  Usually the file looks as given below.
[root@vcsnode1 sysconfig]# cat ntpd
# Drop root to id ‘ntp:ntp’ by default.
OPTIONS=”-u ntp:ntp -p /var/run/”
# Set to ‘yes’ to sync hw clock after successful ntpdate
[root@vcsnode1 sysconfig]#
  • Edit the file and add “-x” to  ”OPTIONS=”-u ntp:ntp -p /var/run/”" line befor e”-u”
  • After editing the file, the contents should look like given below
[root@vcsnode1 sysconfig]# cat ntpd
# Drop root to id ‘ntp:ntp’ by default.
OPTIONS=”-x -u ntp:ntp -p /var/run/”
# Set to ‘yes’ to sync hw clock after successful ntpdate
[root@vcsnode1 sysconfig]#
  • Start ntpd daemon using the following command
[root@VCSNode2 ~]# service ntpd start
Starting ntpd:                                             [  OK  ]
[root@VCSNode2 ~]#

  • Ask the DBA to install/proceed to configure Oracle Cluster

Thursday, 7 August 2014

How to configure Raw Disks in RHEL 5 for Oracle11g udev

The following is to change the owner, group and permissions for raw devices used for Oracle RAC.
Create a file called /etc/udev/rules.d/65-raw-permissions.rules with these contents:
#Set permissions of raw bindings to Oracle Clusterware devices
KERNEL=="raw1", OWNER="root", GROUP="oinstall", MODE="640"
KERNEL=="raw2", OWNER="root", GROUP="oinstall", MODE="640"
KERNEL=="raw3", OWNER="oracle", GROUP="oinstall", MODE="640"
KERNEL=="raw4", OWNER="oracle", GROUP="oinstall", MODE="640"
KERNEL=="raw5", OWNER="oracle", GROUP="oinstall", MODE="640"

Test executing:
udevtest /class/raw/raw1
It should show something like:
udevtest /class/raw/raw1
main: looking at device '/class/raw/raw1' from subsystem 'raw'
udev_rules_get_name: rule applied, 'raw1' becomes 'raw/raw1'
udev_device_event: device '/class/raw/raw1' already in database, validate currently present symlinks
udev_node_add: creating device node '/dev/raw/raw1', major = '162', minor = '1', mode = '0640', uid = '0', gid = '600'
main: run: 'socket:/org/kernel/udev/monitor'
main: run: '/lib/udev/udev_run_devd'
main: run: 'socket:/org/freedesktop/hal/udev_event'
main: run: '/sbin/pam_console_apply /dev/raw/raw1 '

To apply the rules run:
# start_udev
Starting udev:                           [  OK  ]