Topic 'What is 100G optical?' in forum 'Comcast HSI' - dslreports.com

Re: What is 100G optical?

Sat, 19 Jan 2013 14:12:08 EDT

tshirt posted : It helps not raise the cost of increased usage.
This is why you keep hearing that the cost of backbone transit is less and less per bit everyday.
Unfortunately, It takes a huge investment to rollout this technology and all the associated upgrades to make use of the extra bandwidth, so while your bill didn't drop, your cost per bit is likely less than ever before.

Re: What is 100G optical?

Sat, 19 Jan 2013 13:51:13 EDT

Oedipus posted : No.

Re: What is 100G optical?

Sat, 19 Jan 2013 13:37:38 EDT

Madtown posted : Will this help lower cost for the customers too?

Re: What is 100G optical?

Thu, 17 Jan 2013 22:35:55 EDT

fonzbear2000 posted : Thanks for the explanation Espaeth. Definitely a great thing for Comcast then! :)

Re: What is 100G optical?

Thu, 17 Jan 2013 22:30:21 EDT

espaeth posted :

said by fonzbear2000:

What exactly is that? Does it have anything to do with internet connections? What, if any, are the benefits of it to us? I'm looking for a super easy to understand explanation of this.

It's really just a higher capacity interface, like the bump from 100mbps Ethernet to gigabit Ethernet. This larger interface allows for more benefits in cases where you would normally have multiple links between devices.

Packets need to be kept in order from source to destination or you run into flow problems with layer 4 protocols like TCP. In order to accomplish this, routers hash traffic flows so that any given flow stays on one particular interface.

The problem carriers face today is that hashing has to be done at wire speed in hardware, so it cannot be traffic aware. This results in uneven loading.

Say you have 25gbps of traffic between Atlanta and Dallas. As a carrier, you might need 4 or 5 10gig links to carry that traffic because of the unevenness of the hashing algorithm.

When you increase your interface capacity to 100gig, you can aggregate more traffic together in fewer links.

Fewer, bigger links = increased efficiency, lower operational cost per mbps.

Re: What is 100G optical?

Thu, 17 Jan 2013 22:14:35 EDT

YukonHawk posted : Disregard.

Re: What is 100G optical?

Thu, 17 Jan 2013 22:11:44 EDT

fonzbear2000 posted :

said by graysonf:

Try googling '100G optical'

I just did that and now have a better understanding of all this. It's great to see that Comcast is getting into better technology that can bring us even faster speeds.
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Re: What is 100G optical?

Thu, 17 Jan 2013 22:03:59 EDT

fonzbear2000 posted :

said by Oedipus:

What are you doing on fiercetelecom if you don't know what a backbone or core is?

I saw the news item on the home page of this site:
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Re: What is 100G optical?

Thu, 17 Jan 2013 21:58:00 EDT

Oedipus posted : What are you doing on fiercetelecom if you don't know what a backbone or core is?

Re: What is 100G optical?

Thu, 17 Jan 2013 21:51:47 EDT

graysonf posted : Try googling '100G optical'

What is 100G optical?

Thu, 17 Jan 2013 21:43:58 EDT

fonzbear2000 posted : »www.fiercetelecom.com/story/comc···13-01-17

What exactly is that? Does it have anything to do with internet connections? What, if any, are the benefits of it to us? I'm looking for a super easy to understand explanation of this.
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