oc192 backbone

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Posted by bob72, 10-09-2002, 01:55 PM
Hello All I was just wondering if anyone could help me on this. Actually, i am a bit confused about terms like OC3, OC12, OC48 and OC192. While i believe that OC192 servers are considered faster than others, but is this the only criteria one should have in choosing a fast server.This is crucial to our success cause we are located in Asia, with slow dial up connections. leaving aside the support issues i would seek your help in finding faster servers And someone told me that Burstnet has OC192 servers. Counting me as a novice sort of, please clear these certain doubts of mine. Thanks in advance Bob
Posted by braysurdi, 10-09-2002, 02:15 PM
Hey Bob, OC192 is a pretty fat line going into that data center. I guess it's really a question of how many servers they host to say if it's good or bad. If a company hosts a small amount of servers (like 10 or something) then OC3 lines which are 155mbps, are much more than enough. If they host thousands of servers, OC48+ will probably be needed to push the bandwidth through. Then again, you also have to figure in the actual amount of traffic being used. While our 3 servers consume about 300GB of bandwidth a month, a T1 would be enough. But if you are pushing 2500GB of traffic every 30 days, then an OC48 will be needed. BTW, the line speed OC3, OC12, OC48, etc. has nothing to do with the actual speed of the server, but how much mbps can be pushed through the line connecting it to the internet. Hope this helps Eric
Posted by DanielP, 10-09-2002, 02:41 PM
An Oc48 for just 2500gb a month? Er a 10mbit drop could handle that... so really a fractional T3/DS3 The *size* of the pipe has nothing to do with its speed. DS3 is going to be just as fast as a Oc192 as long as its not overloaded. Also, it doesn't really matter what they "claim" goes into the servers, in the end the server is going to be plugged up to a 100BaseT Ethernet card in the server. Most likely then it will go to a 12 or 24 port switch, that 24 port switch will then have a 100mbit uplink into either a master switch or a router. So in reality 12-24 servers will be sharing 100mbit of uplink to the router. From the router is where it will reach the internet. Also be wary of these companies that claim "Gig-E" connections or that they have an Oc192 run into their stuff. 95% of the time thats bs. It doesn't matter the size of the pipe, what matters is how much of it they actually lease. Did you know you can get a Time Warner or Yipes Gig-E connection and only buy 45 or 60mbit of it. Sure its there for expansion but its purely a marketing term. When in reality their able to push no more bandwidth than a regular DS3 or Fractional Oc3. So I truly would not judge any host because of what "connections" they have. If anything I'd ask them what their line usage was and what is their policy. Do they add more connectivity when the line is 80% full? Things like that are much more important than the raw size.
Posted by BigE, 10-09-2002, 03:37 PM
Having and OC192 dont mean too much what I would be worried about is if they only have this 1 link into the building. You can have and OC192 and peal off 5 DS3s off it but the bottom line is you still only have 225 MBPS not a OC192 and your not redundant in the fact your bringing in all your links off one entrance to the building. When laying fiber providers will put the most fiber they can it because it cost no more to do so. So if you get an OC3 from Qwest and they have to lay fiber they are going to lay 192 fiber but only provision an OC3 to you. Some of the better providers get larger lines such as GigE lines and buy bursting bandwidth it prices more but you always have bandwidth on demand and do not have to wait months to turn up new circuits. In the end it depends on the switch gear to what you have to your server but 90% of all servers only come with a 10/100 card. There are many ways to get the link to the server you can do as said here and have a small switch with 10/100 ports and share the 100 mbps among many servers and there is nothing wrong with doing this because it is unlikely that 24 servers are going to push 100mbps. Or you could have a larger switch that can take a gig connection then the servers on that switch are sharing a full 1000 mbps, The limit here is the server with the 10/100 card but your most likely going to be able to get the full 100mps if you ever needed it. In the end this has nothing to do with server speed thats up to the servers processing power and what it can handle.
Posted by BeDifferentSolutions, 10-09-2002, 04:40 PM
For those who say they have OC192 connections, as them if they are "lit". No. They may have the feed, but turning it on is a completely different thing. Anyone with a 56k connection into their computer can say they have a DSL drop. But to turn it on cost a butt load more and also requires a new hardware set. Just like an OC-192. So don't believe the hype. It is marketing. I can not think of any tier two DC with a Lit OC-192.
Posted by 311, 10-09-2002, 04:56 PM
Very good advice. I wish newbies here looking for hosting would actaully read what you've said. It's very good advice. I remember when I was first looking for a hosting plan, I would only sign up for hosts that claimed they had OC-48 connections or higher. I always under the assumption that the bigger the pipe size, the faster your site would load. Oh, how stupid I was...
Posted by braysurdi, 10-09-2002, 07:41 PM
My bad, it's not 2500/mo, it's 2500mbps.
Posted by arnaudpignar, 10-09-2002, 08:53 PM
OC192 is 9.6 GBits/s Sample usage of OC192 : http://west-boot.mfnx.net/traffic/dc...iad-oc192.html Basically there is not so many carrier how have OC192 network link (for ip transit) since only Juniper and Cisco 12000 are able to handle this type of link. Bursnet surelly haven't a OC192. This OC192 : http://west-boot.mfnx.net/traffic/se...1-oc192-2.html will be as fast as a OC3 (155Mbps). A T3 (45 Mbps) won't able to handle this without latence. Anyway if you don't use your box just for download file, i don't think any server will be able to deliver a 45 Mbps. For intense php / mysql server how will deliver up to 100 Mbps, you will need about 20-45 (or more depend of the code etc...) servers for deliver it without problem. Currently any T1 webhosting company will be able to deliver good, fast webhosting service. Depend of they customer size and usage.
Posted by bob72, 10-10-2002, 01:02 AM
Thanks to all of you for providing an enlightning knowledge about the fundamentals of bandwidth. I would like to specifically offer my gratitude to braysurdi, daniel and BigE. Thank you folks for your tips. thanks, BOB
Posted by braysurdi, 10-10-2002, 01:05 PM
Here's a quick pricing and bandwidth chart to see each line speed: http://www.ecttelecom.com/t1.html#799

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