Archive for January, 2011

Updated my theme.

Tonight I finally got around to Readhanging the site a little. I have gone with a new theme to take advantage of some of the updates. Also, I finally got my twitter link on the site. Next, Facebook and Tumblr.

MacOS display network interface configuration (command line)

To display the network interface information for a particular network interface in Snow Leopard (not sure about other versions) use the following:

ipconfig getpacket interface

For example,
# ipconfig getpacket en0
htype = 1
flags = 0
hlen = 6
hops = 0
xid = 446704316
secs = 0
ciaddr =
yiaddr =
siaddr =
giaddr =
chaddr = 0:1e:c2:f:1b:45
sname =
file =
Options count is 8
dhcp_message_type (uint8): ACK 0x5
server_identifier (ip):
lease_time (uint32): 0x15180
subnet_mask (ip):
router (ip_mult): {}
domain_name_server (ip_mult): {,}
domain_name (string): domain.local
end (none):

This gives you much more information than a standard ifconfig command. The command above will display all the current options for the interface. You can narrow this down with the getoption parameter.

Tru64 turn off/on CPUs.

Yes, I know it’s old and retired and nobody cares, but I still have to support a couple Alphas running Tru64 and I always seem to forget this.

To display the status of the CPUs, use the psrinfo command. This will tell you which CPUs are online or offline.

# psrinfo
0 on-line since 01/27/2011 09:35:36
1 on-line since 01/27/2011 09:35:36
2 on-line since 01/27/2011 09:35:36
3 on-line since 01/27/2011 09:35:36
4 on-line since 01/27/2011 09:35:36
5 on-line since 01/27/2011 09:35:36
8 on-line since 01/27/2011 09:35:36
9 on-line since 01/27/2011 09:35:36
12 on-line since 01/27/2011 09:35:36
13 off-line since 01/27/2011 09:53:52

To put a CPU offline or online use the psradm command.

# psradm -f CPU NUMBER

For example, when I turn off CPU 13 listed above, I used the following:
# psradm -f 13

# psradm -n CPU NUMBER

QoS Packet Scheduler – Windows 2008 to Windows 2003

Ran into an interesting issue when accessing a Windows 2003 domain controller from a Windows 2008 server via a gigabit interface connected to gigabit switch.

I was trying to access a Windows 2003 domain controller (HP BL460c) attached to a 1000Mb switch (Cisco 2960) from a Windows 2008 blade server (BL460c) connected to the same 1000Mb switch (Cisco 2960). Performance was terrible. I was having trouble accessing shares on the 2003 DC and the Network Policy Server was not responding to authentication requests when the server had a secure channel to this DC. However, when I had a secure channel to another Windows 2003 DC (HP DL380) connected to a 100Mb switch (Cisco 3550), I had no problems. The solution was to simply install the QoS Packet Scheduler for the Windows 2003 DC (BL460c). This took care of the issue.

Windows 2008 – to display FSMO roles.

The following command will display the current FSMO roles in a domain:

netdom query FSMO

To display the current Primary domain controller in a domain:

netdom query PDC

To display the current domain controllers for a domain:

netdom query DC

To display trust relationships:

netdom query TRUST

Windows 2008 – reset or view sercure channel.

I have used the following to check when domain controller a member server has a secure channel with:

C:\>netdom verify SERVERNAME
The secure channel from SERVERNAMEto the domain DOMAINAME has been verified. Th
e connection
is with the machine \\SERVERNAME.DOMAINNAME.

The command completed successfully.

Furthermore, you can use the following to reset the secure channel:

The secure channel from SERVERNAME to the domain DOMAINNAME has been reset. The c
onnection is
with the machine \\SERVERNAME.DOMANANAME.

The command completed successfully.

I have used similar commands on older OSs, but I am not sure if they were part of the install or part of a resource kit. I have tested these on Windows 2008 and Windows 7.

iPhone field test.

To put your iPhone in field test mode, so that you can see the actual signal strength numerically:

Open the phone application.

Enter the following from the keypad: *3001#12345#*

Press call.

This will put in field test mode, and will replace your bar signal strength with the numerical representation.

Evidently, this has been blocked in a recent version of IOS. I did this from a jailbroken IOS version 4.1 (8B117) with baseband 01.59.00.

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