ISPs make the Internet… Why you don’t want to be one Dennis Boylan [email protected].
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Transcript of ISPs make the Internet… Why you don’t want to be one Dennis Boylan [email protected].
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World Domination:Mission Status
• Internet Acceptance: Established
• Distribution Network: Established
• Corporate Acceptance: Beginning
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What are ISPs?
• Internet Service Provider
• Inter-network service provider
• Network Operators
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Customer Connections
• Dialup– Analog (v.90)– Digital (ISDN)
• Dedicated– Analog (v.90)– DSL (ADSL, IDSL, HDSL)– 56K, 64K, Fractional DS1, Fractional DS3
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Customer Connections continued
• Dedicated (continued)– Bridged– Fractional OC3, Fractional OC12
• Encapsulation– ATM, Frame, POSIP, PPP, SMDS, LAN
(FDDI, Ethernet, Token Ring)
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Typical Dialup
Modem Modem
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Typical Dedicated
E thernet
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Backbone Connections
• DS1• DS3• OC3c• OC12c• OC48c• OC192• OC768
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Services
• DNS
• Dialup
• News
• Web
• Caching
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NAPs
• Network Access Point
• Connects 2 or more networks
• Public NAPS
• Private NAPS
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Major Public NAPs
• MAE-East, MAE-East ATM• MAE-West, MAE-West ATM• Ameritech NAP• SPRINT NAP• PAIX• PB NAP (ATM)• CIX
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NAPS continuedMinor/New
• MAE-LA
• SIX
• MAE-Central (Dallas)
• AIX
• Many Many Others
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NAP Connections
• ATM– DS1 through OC12c
• FDDI (half/full duplex)
• Ethernet/Fast Ethernet(half/full duplex)
• HDLC/Frame Relay– DS1 through OC3
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BGP
• Border Gateway Protocol
• Generates route announcements
• Requires an AS number
• Currently over 10,000 AS numbers
• Provides for access lists
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Levels of ISPs
• Tier 1– Present at 2 or more Public NAPS– Own backbone between NAPS– Full peering with all other Tier 1– Does not pay for transit
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Levels of ISPs continued
• Non-Level 1– Any ISP that pays for transit– Not all ISPs are equal
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Problems with Services
• Hardware failures
• Software failures
• Misconfiguration
• Maintenance windows
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Problems with Telcos
• Fiber cuts
• Circuit ordering
• Circuit capacity
• Billing
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Problems with Telcos continued
• Maintenance
• Redundancy
• Busy signals
• Circuit Grooming
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Problems with Customers
• 7x24 Support
• Billing/collection
• SPAM (UBE)
• Denial of service
• Volume of traffic
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Problems with ARIN/InterNIC
• Lost registrations
• Lost changes
• Double billing
• More paperwork
• Time to complete requests
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Problems with FCC/Gov’t
• Additional Taxes
• Additional Regulations
• Does not understand the industry
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Problem with Facilities
• Power
• Environmental (HVAC)
• Security Access
• Telco Access
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Problems with Personnel
• Continual training
• Lack of qualified people
• Cost of qualified people