September 2011
9 posts
5 tags
Configuration Register on Cisco Routers
The two important configuration register modes to remember are:
0x2102 for normal use.
0x2142 for password recovery. This ignores the configuration (NVRAM).
Cisco page.
1 tag
Local Loop
In telephony, a local loop is the physical wire connection that reaches from the telephone company’s central office (CO) to the customer premises, whether that be a home or a business. Traditionally, the local loop was used only to carry analog signals for voice, but with today’s modems we can use DSL and ISDN over the same lines.
Local Loop Unbundling (LLU) is a telephony term that...
5 tags
Configuring Cisco Repeater Access Points
Cisco access points that have two radios, such as my 1131AG Aironet, can act as a repeater access point. One of the radios is configured as a repeater role-station, while the other remains the root role-station.
Remember: Daisy chaining access points like this will hurt throughput. Because each repeater must receive and then re-transmit each packet on the same channel, throughput is cut in half...
4 tags
Load Balancing T1 Circuits with Cisco CEF
1. Create your static routes on both interfaces, on both routers. 2. Use the ip load-sharing per packet interface command.
Link here.
3 tags
e.g.
e.g. means ‘for example’. It stands for ‘example gratia’ in Latin.
5 tags
Needed Redundancy
N+1 redundancy refers to a needed component (N) that has at least 1 backup component (+1) in the event of a failure. N+1 is referred to as active/passive or standby.
Example of N+1: a generator starting and carrying the load when normal utility power is lost. The generator is not on all the time, which would be active/active, instead it is on standby while utility power is working normally.
...
4 tags
IDE
The term IDE (integrated drive electronics) refers to any hard drive with a built-in controller. All hard drives are technically IDE drives, although we only use the term IDE when discussing ATA drives.
5 tags
Login Banner in OS X Lion
This is pretty cool. You can create a login banner within OS X Lion. This would be very helpful in a classroom network of Macs, or computers that are for public use.
http://support.apple.com/kb/HT4788
5 tags
Cisco Wireless - Show SSIDs
AP#show dot11 bssid
Interface BSSID Guest SSID
Dot11Radio1 0023.04d3.6490 Yes LAB
Dot11Radio0 0023.04cc.6e00 Yes LAB