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gf1966

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#133835 4-Nov-2013 16:03
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Hi Im new to the internet/networking game in NZ and would appreciate some advice/understanding of the following.

I dont understand why corporates have separate Domestic / International peering arrangements, say 100M for Domestic and 30M international. I thought that was the function of the ISP to determine where the traffic routes?

2) Does that mean that the customer must peer with the international ISP and domestic ISP separately and that they must have separate IP address space for both?

3) Do you need separate domestic/international AS numbers?

3) So if you want to host a web server for global access, do you need to configure it with 2 ip addresses or use NAT or a load balancer?


Any advice would be appreciated.

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Sounddude
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  #927087 4-Nov-2013 16:12
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Some corps do it to try and save money, Domestic is cheaper than international.

Its not something I would do as it makes your network complex and requires routers which can do BGP and support small route tables. You also need staff to drive it.

But to answer your questions

2) You need your own IP Space to do this properly, or given some from your ISP (but that means you can only use that ISP). You advertise your given IP space to both National and International ISP Peer.

3) No, one AS number for both

4) Just the one IP.

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gf1966

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  #927215 4-Nov-2013 19:58
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Sounddude: Some corps do it to try and save money, Domestic is cheaper than international.

Its not something I would do as it makes your network complex and requires routers which can do BGP and support small route tables. You also need staff to drive it.



Thanks very interesting... Im getting there.  

5) Ok so if you do not have BGP routers you can just peer with a single ISP, single peer for all local/intnl needs, COOL! But why would it be more expensive, cant the ISP meter off all the international traffic or rate limit/provide different CIR for both?

6) Can I use the same ISP with Intl/Local peering to avoid having 2 separate physical ciruits to my router?

7) Where can I buy the international peering from? Vocus, Telecom NZ, Telstra Clear any others...?


TIA!

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  #927240 4-Nov-2013 20:44
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gf1966:
Sounddude: Some corps do it to try and save money, Domestic is cheaper than international.

Its not something I would do as it makes your network complex and requires routers which can do BGP and support small route tables. You also need staff to drive it.



Thanks very interesting... Im getting there.  

5) Ok so if you do not have BGP routers you can just peer with a single ISP, single peer for all local/intnl needs, COOL! But why would it be more expensive, cant the ISP meter off all the international traffic or rate limit/provide different CIR for both?

6) Can I use the same ISP with Intl/Local peering to avoid having 2 separate physical ciruits to my router?

7) Where can I buy the international peering from? Vocus, Telecom NZ, Telstra Clear any others...?


TIA!


5. Yes most if not all can do split national/international, although these days some don't bother as nat/int prices aren't so disparate anymore.
6. Absolutely
7. Vocus, Orcon, Telecom, Telstraclear/Vodafone etc can certainly help you out :) drop me a PM with your details and I can get someone to talk to you about it offline



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  #927289 4-Nov-2013 22:14
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What kind of traffic volumes are you talking and redundancy required? Probably easiest to just get a service form one ISP and use their IP space too.




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gf1966

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  #927342 5-Nov-2013 01:08
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Hi Traffic volumes are not huge my main requirement is reliability and keeping it simple. 

I dont want separate services for Intl/domestic but I do want an alternate ISP for backup. Will I need a minimum  /24 of PI address space for multi-homing?

Sounddude
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  #927352 5-Nov-2013 06:59
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gf1966: Hi Traffic volumes are not huge my main requirement is reliability and keeping it simple. 

I dont want separate services for Intl/domestic but I do want an alternate ISP for backup. Will I need a minimum  /24 of PI address space for multi-homing?


Yes min /24. The IP range must be marked as PORTABLE by the ISP who have given it to you, or using your own IP Space given by APNIC.

Trying to multihome with 2 ISP's using NON-PORTABLE IP range will cause you nothing but grief.


These days ISP's are very reliable with most of the outages being in the access layers (fibre cuts etc). To keep things simple I would keep one ISP but get multiple access tails to the same ISP. That way the BGP config is simple and you don't have to muck around with finding PORTABLE ip space. You can still do the National/International split (if you really wanted to) and use BGP for redundancy.





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