About Me

ISP & Network guru with 15 years experience in the ISP field.

 

January 2010
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Real World Wireless Application

From Slashdot:

“Armatix has built a pistol that will disarm itself when it is taken away from a watch that sends it a wireless arming signal. The .22 caliber guns will go on sale in the US within months, and the initial price is 7,000 euro. Higher caliber models will follow. To activate the gun, users [...]

Install Photo of the day

Canopy Cluster with GPS Sync

802.22

http://en.wikipedia.org/wiki/IEEE_802.22

One of the big benefits of this is the CPE talk back to the base station and relay data about their connection.  After amassing this data determine if the base stations needs to hop a channel or stay on the same channel. Very cool for dealing with noise on the fly.

Cisco TSHOOT Beta Exam

From http://ciscocert.custhelp.com/app/answers/detail/a_id/5798

The TSHOOT beta is an early release of the TSHOOT certification exam, which is used to determine the predictive ability of the exam questions.  It is the same length and covers the same topics as the final exam.  Candidates who pass a beta exam receive full credit, however scores on beta exams are not immediately available. [...]

Starting a WISP – Mounting antennas

There are a wide variety of ways to mount equipment.  We are big fans of using standoffs.  By using standoffs you are lessening the rick of electrical surge damage. Electricity will find the shortest path to ground.  It won’t travel down/up a tower, out to a standoff, and back.  Standoffs also do the important job [...]

Install Photo of the day

Rohn 25 around 120 feet

300 million for 14 grants

http://www.dailywireless.org/2010/01/25/300m-in-broadband-grants-for-14-projects/

This is one reason WISPs need to unify.  Look at the list of companies that are getting this money.  I count 11 telephone companies & Utilities. At this rate the typical WISP will have an uphill battle.  To me the WISP industry is not a long term model.  I could be wrong.  This is why [...]

Cisco Netflow Video

Configure Netflow From Youtube

Picture of the Day

Mikrotik 5.8 Backhaul

Connection Limits on Mikrotik

I recently had an instance where I had to re-visit adding connection limits to a CPE running lots of connections.  they were probably P2P. Here is the code we added:

/ip firewall filter
add chain=forward action=log tcp-flags =syn protocol=tcp connection-limit=100,32 log-prefix=”CONN_LIMIT:” comment=”connection limit” disabled=no
add chain=forward action=drop tcp-flags =syn protocol=tcp connection-limit=100,32 comment=”connection limit” disabled=no

What this code does is [...]