Choosing a Service Provider

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Choosing a Service Provider
Managing Networks and TelecommunicationsModule 7
Part 2
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Choosing an ISP for Corporate Internet Access

• Presentation for UniSA
• Jim Kellett
• Technical Consultant
• Internode Systems Pty Ltd

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"Choosing an ISP for Corporate Infrastructure
Access to the Internet"
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Part One Customer Premises

• Internet Firewall
• May be a proprietary appliance (eg Cisco PIX)
  proprietary software (eg Checkpoint) or GPL
  software (eg Smoothwall) on generic server.
• Many incorporate VPN concentrator function for
  remote access.
• Router
• This is only required if the transmission service
  is not presented as Ethernet or if transmission
  redundancy is required.
• Sometimes the firewall is built into the router
  (eg Cisco 837).
• DMZ
• For example the web server and/or email server
  note a DMZ is not always required.
• LAN
• Internet access to users often via a proxy
  server for authentication, accounting, surf
  control.

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Part Two Transmission Service

• Permanent Dial
• PSTN (Analogue Modem) - 33 kbps, very cheap!
• ISDN Business 64 or 128 kbps, 350 to 550 per
  month
• ADSL (note asymmetric)
• Bandwidths of 256k/64k, 512k/128k, 512k/512k
  (handy for upload), 1.5M/256k widely available.
  Can support up to 8M/1M (dependent on distance)
  via Agile DSLAM.
• Typically 80 to 250 per month.
• Agile ADSL2 Supports up to 12M/1M dependent on
  distance, limited coverage.
• Agile ADSL2 Supports up to 24M/1M dependent on
  distance, limited coverage.
• Leased Line
• Typically 2 Mbps symmetrical priced from 500 to
  1500 per month no contention and high
  reliability.
• Note also similar bandwidth radio solutions -
  lower prices but subject to contention weather.
• Ethernet
• Bandwidths of 2, 5, 10, 50, 100 1000 Mbps are
  typical priced from 800 to 3,000 per month
• Generally no contention, high reliability and
  scalability.

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Part Three Internet Service Provider

• Usage Based Charging
• For example, 25 Gbytes download per month for
  750 then 0.07 per Mbyte excess.
• Permanent Dial and ADSL services are usually
  bundled with an amount of included usage (mass
  market products).
• Flat Rate Charging
• For example, unlimited traffic for 1,000 per
  Mbps per month, no excesses.
• Note this tends to be true unlimited for
  corporate usage, not shaped as with residential
  services.
• Other Charging Elements
• One static IP address is included additional IP
  addresses attract a small annual charge (and
  after a point must be justified to APNIC).
• Domain Name Hosting (eg acme.com.au) is often
  part of the solution and attracts a small annual
  charge per domain.

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Whats Inside That Internode Cloud?

• MultiMbps connections to The Gang of Four
  Telstra, Optus, MCI Connect/AAPT because all
  backbones have bad hair days!
• MultiMbps connections to major peering points
  PIPE, AARNET, SAIX, VIX, WAIX, Pacific, PIPE, etc
  its about universal connectivity.
• A private national backbone (155 Mbps STM-1 to
  622 Mbps STM-4) with redundant links via diverse
  carriers high availability even during major
  Internet outages.
• Dual (and geographically diverse) PoPs in each
  major city.
• Serious International IP thats where most of
  the web sites are!
• Lots of switches, muxes and routers quite a few
  obscure acronyms.
• Helpful people who understand how it all works.
• Big caches and mirrors are also useful features.

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OurCloud
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Would You Like Fries With That?

• Is it just an Internet Connection or is it a
  transmission link to a Service Provider?

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Web Serving

• Same platform can be used to provide very high
  bandwidth Internet connection to corporate web
  server located in high availability environment.
• Managed hardware or simple co-location.
• Note transmission link is now private
  (non-Internet, unmetered)

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DRP/BCP/Storage

• Same platform to access a high security
  environment for off-site data storage and/or
  disaster recovery (business continuity) systems.

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Wide Area Network

• Same platform for private network links to remote
  offices.

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IP Originated Voice

• Same platform for IP Telephony gateway to the
  public network.