[AusNOG] Attempting to understand DC internet connectivity

[Harry Chan]

Hi Richard,

 

Normal IP Transit will including local and international – it’s just something you won’t need to worry about until higher commitment rates. It might not matter at all.

 

I’m sure everyone has some contention ratio at one end or the other. You’ll need to evaluate the network performance and make a judgement. The costs vary not just because of contention but other things such as latency and throughput. If you’re consuming content – be sure to run traces and speed tests from the upstream you’re purchasing to see how it goes.

 

Keep in mind that there’s commit and port speed. What speeds do you need to reach? Is it constant? You may need more than 10mbit at once but not all the time. This may change your costs and even minimum commit required with upstreams. Some do offer burstable speeds – some don’t.

 

In terms of redundancy – you can always ask upstreams for dual handoff – 2 ports from separate routers (on top of having multiple upstreams).

 

BGP won’t load balance single connections. Perhaps multiple on different IPs. You may or may not get an even split. I wouldn’t depend on it.

 

Cheers,

 

-- 

 

Harry Chan

 

From: Richard Thornton [mailto:richie.thornton at gmail.com] 
Sent: Monday, 13 April 2015 10:42 PM
To: Harry Chan; ausnog at lists.ausnog.net
Subject: Re: [AusNOG] Attempting to understand DC internet connectivity

 

Thanks Harry, stick to international per mbit in the beginning, got it.

To clarify:

-I already have stuff in SY3 colo through a reseller, I want to explore going direct, relocating within SY3 would be nice (I think they do half racks now).

-I already have an allocation from APNIC.

-Taking up to 1/2 a rack is OK.

-I plan to mostly consume content.

-I plan to grow the mbit/sec considerably.

-I would want direct 24/7 access to my rack.

-I like the idea of choosing my upstreams, adding local later and maybe connecting in to AWS and Azure.

Newbie questions alert: 

When you see pricing advertised like $18 per mbit for SAU colo (with redundant upstreams), are they just passing on the massive discounts they get for large pipes or is there some form of contention ratio going on, they seem to be much cheaper than going direct with a single upstream?

If you had two upstreams and wanted 20mbit total from Vocus and Telstra, how would you carve up the mbit for redundancy, have 10mbit from each so if one fails you temporarily lose half your bandwidth (BGP wasn't that great at load balancing can you even get a 50/50 split like that)?

Do upstreams generally support the creation of queues and receiving DSCP markings on their border, so you could shape an IP coming from your network to stop them consuming all your upstream bandwidth?

That's about it for now.

Thanks.

Richard 

On Mon, 13 Apr 2015 17:28 Harry Chan <harry.chan at queryfoundry.com <mailto:harry.chan at queryfoundry.com> > wrote:

Hi Richard, on such low commits most providers won’t differentiate between local / international or there won’t be much price difference or advantage. It only makes a difference once your commit a lot higher.

From: AusNOG [mailto:ausnog-bounces at lists.ausnog.net <mailto:ausnog-bounces at lists.ausnog.net> ] On Behalf Of Richard Thornton


Sent: Monday, 13 April 2015 5:23 PM
To: ausnog at lists.ausnog.net <mailto:ausnog at lists.ausnog.net> 
Subject: [AusNOG] Attempting to understand DC internet connectivity

 

Hello Everybody,

 

Newbie here, hopefully this hasn't been asked before (I couldn't see a way to search the archives) so please be gentle.

 

Say I go direct to one of the big Sydney DC providers and take up whatever minimum RU they require, say it's Equinix, it looks like I can take their (already highly redundant) internet product or I can bake my own by peering with other (national and international) upstream providers that I choose and Equinix will cross connect me to them, is that correct?

 

What would be the (very) rough setup costs involved and per mbit / per month costs for say 30mbit (combined 2 peers international and 2 peers national, I ask this because I don't think most DC internet products separate international and national) or 10mbit (2 peers international) / 20mbit (2 peers national) as well as any advantages/disadvantages of each method? (in both cases assume I have the equipment and expertise to install and configure it all).

 

Apologies if I haven't asked this properly, essentially what  I am asking is whether it is considerably cheaper to build a resilient internet connection by buying direct from upstream peers like Vocus for such low bandwidth, is it even possible, do they have a minimum bandwidth requirement for customers?

 

Thanks for looking.

 

Best regards

Richard

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