Wednesday, 1 October 2014

Best Practices for Determining the Traffic Matrix in IP Networks

• Internal Traffic Matrix
   – PoP to PoP matrix
      • Can be from core (CR) or access (AR) routers
   – Class based
• External Traffic Matrix
    – PoP to External AS
          • BGP
          • Origin-AS or Peer-AS
                 – Peer-AS sufficient for Capacity Planning and Resilience Analysis
           • Useful for analyzing the impact of external failures on the core network (capacity/resilience)
• Example Data from Tier-1 IP Backbone
   – Measured Traffic Matrix (MPLS TE based)
   – European and American subnetworks
   – 24h data
• Properties
   – Temporal Distribution
       • How does the traffic vary over time
   – Spatial Distribution
       • How is traffic distributed in the network?
   – Relative Traffic Distribution
       • “Fanout”
Traffic Collection:
• Data is collected at fixed intervals
    – E.g. every 5 or 15 minutes
• Measurement of Byte Counters
    – Need to convert to rates
    – Based on measurement interval
• Create Traffic Matrix
   – Peak Hour Matrix
      • 5 or 15 min. average at the peak hour
   – Peak Matrix
      • Calculate the peak for every demand
      • Real peak or 95-percentile
Collection Methods:
• NetFlow
     – Routers collect “flow” information
    – Export of raw or aggregated data
    – Routers collect aggregated destination statistics
    – LDP
          • Measurement of LDP counters
     – RSVP
          • Measurement of Tunnel/LSP counters
• Estimation
     – Estimate Traffic Matrix based on Link Utilizations

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Breakfast At Serengeti

Breakfast At Serengeti
Lion's Share

The Ngorongoro Family

The Ngorongoro Family
Click on the Picture Above To Make It Larger

Tabloid Time: The Aliens Are a'Landing ?!.. ;-)

At the risk of being ridiculed and being labelled a freak, I shall like to draw everyone's attention to the following recent events....If you watch the videos then turn on the sound for the commentary...

Fireball across Ausin, Texas (16th Feb 2009). According to BBC, apparently, its NOT debris from a recent satellite collision...:

Same in Idaho in recent times. NO meteor remains found yet:

Exactly same in Sweden:

This was recorded on 25th Feb 2007 in Dakota, US:

This year has seen three of the spookiest UFO videos surface, with people in India, Mexico and even in space, NASA, spotting things they couldn't explain:

CHECK out this one on 24th Januray, 2009 in Argentina close to Buenos Aires:
You tube:
Press Coverage

AND Lastly, and more importantly, from Buzz Aldrin on Apollo 11 :

Heh?! Don't know how authentic these news are... don't even know if these are UFO's or meteors or ball lightning or something else. But, if meteors, then where are the meteorites ? However, I see no reason why life cannot exist in other planets and why they could not be sneaking around here :-) . I for one, have long suspected some of my relations to be space aliens or at least X-people from X-files :-)

I am waiting for a job on an Alien spaceship myself. :-)

Giraffes in Parallel Universe

Giraffes in Parallel Universe
At Lake Manyara

Serengeti Shall Never Die

Serengeti Shall Never Die
Wildebeeste Calf starts running only 5 min. after being born. CLICK on the pitcture to view Slideshow