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PodSnacks: Multiprotocol Label Switching (MPLS)

Posted Monday, July 07, 2008 6:00 AM by mgilbert :: 0 Comments
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Attachment(s): http://podcast.hill-vt.com/podsnacks/2007q2/mpls.mp3
Well, we've been threatening to do this for a while, so today is MPLS day. Tune in as Michel explains the basic concepts. You can listen to (or download) the PodSnack by clicking here , or you can use the Flash player below. If you have an idea or Read More...

PodSnacks: Quality of Service vs. Class of Service

Posted Tuesday, December 11, 2007 6:00 AM by mgilbert :: 2 Comments
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Attachment(s): http://podcast.hill-vt.com/podsnacks/2007q1/cos-qos.mp3
Two concepts that are commonly confused in the telecommunications industry are Class of Service (CoS) and Quality of Service (QoS). In today's PodSnack, Mark and Michel discuss these two terms, provide some simple definitions and a simple analogy Read More...

PodSnacks: ATM Service Types

Posted Friday, November 02, 2007 6:00 AM by mgilbert :: 0 Comments
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Attachment(s): http://podcast.hill-vt.com/podsnacks/2007q4/atm_vc.mp3
Today I want to wander back to the world of ATM . ATM defines several different types of virtual circuit , and they have bizarre names like CBR , VBR , UBR , GFR , and ABR . So today Trevor and I are going to walk you through the difference between these Read More...

PodSnacks: MPLS QoS

Posted Tuesday, October 23, 2007 6:00 AM by mgilbert :: 0 Comments
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Attachment(s): http://podcast.hill-vt.com/podsnacks/2007q4/mpls_qos.mp3
The discussion about congestion and packet discard discard continues! Today, Trevor and I chat a bit about the way packet discard is handled in MPLS networks, including how mapping is performed between the various CoS signaling strategies (e.g., DiffServ Read More...

PodSnacks: Packet Discard

Posted Monday, October 22, 2007 6:00 AM by mgilbert :: 0 Comments
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Attachment(s): http://podcast.hill-vt.com/podsnacks/2007q4/packet_discard.mp3
Trevor and I seem to be on a roll, so what the heck, let's have another PodSnack together. Today's topic picks up on the the other day, when we discussed congestion . Today we're going to discuss packet discard . Enjoy! As always, you can Read More...

PodSnacks: Congestion

Posted Thursday, October 18, 2007 6:00 AM by mgilbert :: 0 Comments
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Attachment(s): http://podcast.hill-vt.com/podsnacks/2007q4/congestion.mp3
I trapped Trevor in the office today, and we had a bit of a conversation about congestion . Since it fit well with the discussion we've been having about queuing, I thought it would be a good idea to record it and post it. Congestion happens in queuing Read More...

PodSnacks: Deficit Weighted Round Robin Queuing

Posted Monday, October 15, 2007 6:00 AM by mgilbert :: 0 Comments
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Attachment(s): http://podcast.hill-vt.com/podsnacks/2007q4/dwrr.mp3
Today we complete our discussion of queuing . We've looked at FIFO queues and strict priority queues (SPQ). We've also looked at round robin queues and weighted round robin (WRR) queues. In our last snack on this specific topic, we're going Read More...

PodSnacks: Weighted Round Robin

Posted Friday, October 12, 2007 6:00 AM by mgilbert :: 0 Comments
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Attachment(s): http://podcast.hill-vt.com/podsnacks/2007q4/wrr.mp3
Today we build on our discussion of round robin queues by looking at a way to give different queues in the system a weighting. The new queuing system is, obviously enough, called weighted round robin queuing . It's still not the perfect queue, but Read More...

PodSnacks: Round Robin Queuing

Posted Thursday, October 11, 2007 6:00 AM by mgilbert :: 0 Comments
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Attachment(s): http://podcast.hill-vt.com/podsnacks/2007q4/rrq.mp3
I sure as heck hope you're interested in queuing concepts, because we seem to be on a roll with different queuing models. So far we've talked about first in, first out (FIFO) queues and strict priority queues (SPQ). Today we are going to talk Read More...

PodSnacks: Strict Priority Queuing

Posted Wednesday, October 10, 2007 6:00 AM by mgilbert :: 0 Comments
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Attachment(s): http://podcast.hill-vt.com/podsnacks/2007q4/spq.mp3
In our on-going series about queuing in packet networks, today we're going to look at a queuing technique that is more sensitive to the differences in traffic type than first in, first out (FIFO) queues. This type of queue, called a strict priority Read More...

PodSnacks: DiffServ

Posted Tuesday, October 09, 2007 6:00 AM by mgilbert :: 0 Comments
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Attachment(s): http://podcast.hill-vt.com/podsnacks/2007q4/diffserv.mp3
Since we've been on something of a quality of service (QoS) theme, and since we got a request for it, today we're going to talk a little about DiffServ . DiffServ is more about class of service (CoS) than it is about QoS, but the concepts are Read More...

PodSnacks: First In, First Out

Posted Monday, October 08, 2007 6:00 AM by mgilbert :: 0 Comments
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Attachment(s): http://podcast.hill-vt.com/podsnacks/2007q4/fifo.mp3
We've been doing some snacks about queuing in packet networks. Today we return to that them with a look at the most basic form of queuing: the first in, first out (FIFO) queue. This queue type would seem to be the most fair: arriving packets go to Read More...

PodSnack: Traffic Shaping

Posted Friday, October 05, 2007 6:00 AM by mgilbert :: 0 Comments
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Attachment(s): http://podcast.hill-vt.com/podsnacks/2007q4/traffic_shaping.mp3
You want your traffic to be in better shape? No problem. A little diet. A little exercise. Those packets will be lean and mean in no time at all. Unfortunately, traffic shaping is not quite as easy as diet and exercise. (Actually, now that I think about Read More...

PodSnacks: Queuing Delay

Posted Thursday, October 04, 2007 6:00 AM by mgilbert :: 0 Comments
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Attachment(s): http://podcast.hill-vt.com/podsnacks/2007q4/queuing_delay.mp3
Recently, we did a PodSnack on the concept of delay in packet networks. We noted that one of the thorny forms of delay to deal with is queuing delay . This delay occurs when more packets arrive to be forward on a particular facility than the facility Read More...

PodSnacks: Delay

Posted Friday, September 28, 2007 7:00 AM by mgilbert :: 0 Comments
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Attachment(s): http://podcast.hill-vt.com/podsnacks/2007q3/delay.mp3
We hear references to the importance of Quality of Service (QoS) in packet networks all the time. This concept is an important one as we increasingly use our packet networks to carry more than just data. Although QoS is not solely a matter of controlling Read More...
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