WAN Overview Pg 1

1
WAN Overview Pg 1

• Three regional Hubs will be established at the
  District Office/Data Center, Service Center, and
  Shaw Butte Elementary School.
• Each District Hub location will house a regional
  network management host to support its area. The
  management scheme for the data portion of the
  network will be based on the Simple Network
  Management Protocol (SNMP) standards. All
  routers will be pointed to the master Network
  Management host for the purpose of downloading
  new or existing configurations.
• Each District Hub location will contain a DNS
  server to support the individual schools serviced
  out of that location. Each school site will also
  contain a host for DNS and e-mail services (local
  post office) that will maintain a complete
  directory of all staff personnel and student
  population for that location.

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WAN Overview Pg 2

• The update DNS process will flow from the
  individual school server to the Hub server and to
  the district server.
• All Internet connectivity will be supplied
  through the District Office with the District
  Office being the single point of contact for all
  schools and organizations within the district.
  The Washington School District WAN will connect
  all school and administrative offices with the
  district office for the purpose of delivering
  data.

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Washington Project The Two-Layer Hierarchical
Model

• The Washington School District WAN will be based
  on a two-layer hierarchical model. Three regional
  Hubs will be established - one each at the
  District Office/Data Center, the Service Center,
  and Shaw Butte Elementary School - in order to
  form a fast WAN core network.

4
Washington Project The Two-Layer Hierarchical
Model
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Traffic will flow as shown here.
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Point-to-Point Protocol

• PPP will be used on all connections that run
  between LANs. ISDN will be used to connect a
  community school to the autonomous network. Frame
  Relay will be used on the connection to the
  internet from the autonomous network.
• The encapsulation type is set on all the
  point-to-point connections as encapsulation ppp.
  Also the authentication is set to chap with an
  encryption strength of 0. The password for all
  the schools is the name of the central office
  plus the letters co at the end
• The encapsulation type is set on all
  point-to-point between central offices a
  encapsulation ppp. Also the authentication is set
  to chap with an encryption strength of 0. The
  password is datacenterco just like the schools.

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Serial 10 Interface for Point-to-Point to Schools
(Configuration)

• hostname data-center...!interface Serial10ip
  address 10.0.0.25 255.255.0.0no ip
  directed-broadcastno ip mroute-cacheencapsulatio
  n pppppp authentication chapppp chap password 0
  datacentercodescription 1.544 Mbps CIR PPP link
  from Data Center to a school!

8
Serial 3 Interface for Point-to-Point between
Central Offices (Configuration)

• hostname data-center...!interface Serial2ip
  address 10.0.0.3 255.255.0.0no ip
  directed-broadcastno ip mroute-cacheencapsulatio
  n pppppp authentication chapppp chap hostname
  service-centerppp chap password 0
  datacentercodescription 1.544 Mbps CIR PPP link
  from Data Center to Service Center!

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Basic Rate Interface 0 for Point-to-Point ISDN to
Community School (Configuration)

• hostname shaw-butte-school...!interface
  bri0ip address 10.0.0.45 255.255.0.0no ip
  directed-broadcastno ip mroute-cacheencapsulatio
  n pppppp authentication chapppp chap password 0
  shawbutteschoolcodescription ISDN link from
  Community School to Shaw Butte School C.O.!

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Why PPP is better than HDLC

• PPP is better suited for the job than HDLC
  because it provides better connectity and better
  reliability than HDLC. It also supports
  connectivity for upper layer protocols such as
  DHCP, DNS, HTTP and TCP.

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How Frame Relay Will Be Inserted Into The WAN

• Frame Relay will be used on the T1 link to the
  Internet Service Provider. Frame Relay is better
  used on this link than on the other links because
  it provides a low latency connection straight to
  the Internet.

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WAN Pricing

• 
  Component Price Quantity Total
  Cost
• Cisco 7513 Router
  13329.21 3 39987.63
• Cisco 2621 Router (Community School)
  2649.80 33 87443.40
• T1 Frame Relay Connection (per Month)
  870.00 1 870.00
• T1 Frame Relay Installation
  2950.00 1 2950.00
• T1 Point-to-Point (per Month)
  375.00 44 16500.00
• T1 Point-to-Point Installation
  2950.00 44 129800.00
• 
  
  Total 277,551.03