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Difference between revisions of "Network"

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The network at TJ is expansive, if you haven't noticed already. For example, as of August 1997, the school had over 800 computers on the LAN<ref>[http://web.archive.org/web/19991006131432/www.tjhsst.edu/TriSchool/TJNet.html TJHSST and the LAN], 6 October 1999. 2 October 2010.</ref> The network was originally made up of thick and thin-net, but this was eventually transitioned to Cat 5 cable, and mostly to Cat 5e cable as the school is now<ref>[http://web.archive.org/web/19961117213851/www.tjhsst.edu/TechLabs/CS/Systems/network.html The Network]. 29 October 1996. 3 October 2010.</ref>.
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==Internet Connections==
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Around 2005-2006, TJ was connected to the Internet2 backbone through Network Virginia. One of the reasons (but probably not primary) was that Network Virginia routed IPv6 traffic, which TJ has had the ability to do for several years now.
  
==Equipment==
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TJ currently has three internet connections: I-Net, UUNET, and Network Virginia. The I-Net connection is a 150Mbps uplink to FCPS run by Cox, which accepts port 80 traffic. The UUNET connection is a T1, and is for backup purposes. The Network Virginia link is a DS3 which routes on the Internet2 educational backbone.
Back in the old days, the Syslab used a Honeywell DPS6 cabinet housed in the Machine Room for its main networking closet. This housed 4 Allied Telesyn 12-port smart hubs and 1 Allied Telesyn 24-port smart hub, which received a Internet connection by a Telebit Netblazer with a 28.8 modem dial-in to UUnet<ref>[http://web.archive.org/web/19961117213851/www.tjhsst.edu/TechLabs/CS/Systems/network.html The Network]. 29 October 1996. 3 October 2010.</ref>.
 
  
TJ has primarily been a Cisco school for many years now. Many years back, the Syslab used a Cisco Catalyst 2908XL switch named [[Spine]] which also connected to three Linksys 10/100 16-port switches. In February of 2003, the Syslab's Cisco switch was fried since all three power supplies were required for power to be redundant, and this knowledge was not known. The lab was converted to using 10Mb/s switches for a while. Sometime after this the lab acquired a Cisco 4006, which was replaced by the Cisco 4506 in Spring 2008.
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==Internal Network==
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The internal TJ network relies on a central Cisco 6509 switch with fiber links to 5 network hubs. The 6509 is currently scheduled to be upgraded to include a 10GigE module, so the satellite hubs will have 10GigE uplinks to the core switch. The Syslab, one of the satellite hubs, has four fiber links to the main switch, of which three are being used: CSL IPv4 traffic, IPv6 traffic, and Sun Ray traffic. Each of these is a 1GigE uplink from the CSL's Cisco 4506 (purchased around 2007-2008, installed spring of 2008; a fire alarm went of during the installation of the new switch).
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==Switches==
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TJ has primarily been a Cisco school for many years now. The Syslab's main router is a Cisco 4506 with a few SOHO switches for additional machines.
  
 
As a backup router, the Syslab has utilized a Cisco 1751 which resides under the floor, a few tiles away from the switch. This 10Mb/s switch was last used when the Cisco 4506 switch was being installed, and a temporary router was needed so all Syslab services weren't offline.
 
As a backup router, the Syslab has utilized a Cisco 1751 which resides under the floor, a few tiles away from the switch. This 10Mb/s switch was last used when the Cisco 4506 switch was being installed, and a temporary router was needed so all Syslab services weren't offline.
  
==Network Connections==
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==Wiring==
*UUnet - The CSL has had a UUnet connection since...forever. It is currently a T-1 line, but has been  upgraded from a 28.8k dial-in line from 1996. As it stands in 2010, it is purely for backup, but it has been in use since at least 1996<ref>[http://web.archive.org/web/19961116202118/www.tjhsst.edu/TechLabs/CS/Systems/iris.html CSL Systems - Iris] 26 September 1996. 3 October 2010.</ref>. As of 1 March, 2012, the T1, originally offered through UUNet, then MCI, then WorldCom, and now Verizon, has been suspended. The circuit is still active, but our account with Verizon is apparently suspended and we can't pass traffic through it.
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The Syslab's wiring was re-done over the summer of 2008 and Cat6 cabling was installed. Prior to this (not sure as to the date) the Syslab was decked out in Cat5e wiring. Both of these installations were done by students.
*FCPS T1 - While the CSL had the UUnet connection, the Windows-side of the network connected to the Internet through a T1 line. In the late 90's, [[Tangerine]], a server in the Syslab, acted as a proxy so machines were able to connect to the Internet via the mostly-stable T1 line<ref>[http://web.archive.org/web/19970624021806/www.tjhsst.edu/TechLabs/CS/Systems/Tang.html Tangerine: The Proxy], 25 December 1996. 3 October 2010.</ref>.
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[[Category:To Update]]
*DS3 - This connection is what TJ uses to join up to the Network Virginia backbone, which lets the school onto Internet2 at ~44Mbps. This was briefly disconnected for a year, but is still in use (2010). The connection is scheduled to be disconnected during AY2012 due to the implementation of the 1G EPL to NLR.
 
*1G EPL - The newest addition to the TJHSST network family is a 1000Mbps Ethernet Private Line (EPL) connecting TJ directly to MATP/MAX in McClean to gain direct access to the National Lambda Rail network. Peering to Internet2, NetworkVirginia, and the commodity Internet is still occurring, but in a more direct and faster way. The cost of this line is 1.4x the DS3, which will be decommissioned approximately a month after this new connection is in place.
 
 
 
==Tri-School Network==
 
TJ was one of the three schools on the Tri-School network, which were able to access the Internet via a 56Kb dial-up link provided by NASA. The connection to TJ was shared between J.E.B. Stuart High School and West Springfield High School as well.
 
 
 
Around October 1999, the Tri-School Network was upgraded to a T-1 Internet connection provided by FCPS. The links between TJ and the other schools were upgraded to cable TV links, and were T-1s as well. The protocol used for these was the Novell stack.
 
 
 
==References==
 
{{reflist}}
 

Latest revision as of 00:26, 27 February 2016

Internet Connections

Around 2005-2006, TJ was connected to the Internet2 backbone through Network Virginia. One of the reasons (but probably not primary) was that Network Virginia routed IPv6 traffic, which TJ has had the ability to do for several years now.

TJ currently has three internet connections: I-Net, UUNET, and Network Virginia. The I-Net connection is a 150Mbps uplink to FCPS run by Cox, which accepts port 80 traffic. The UUNET connection is a T1, and is for backup purposes. The Network Virginia link is a DS3 which routes on the Internet2 educational backbone.

Internal Network

The internal TJ network relies on a central Cisco 6509 switch with fiber links to 5 network hubs. The 6509 is currently scheduled to be upgraded to include a 10GigE module, so the satellite hubs will have 10GigE uplinks to the core switch. The Syslab, one of the satellite hubs, has four fiber links to the main switch, of which three are being used: CSL IPv4 traffic, IPv6 traffic, and Sun Ray traffic. Each of these is a 1GigE uplink from the CSL's Cisco 4506 (purchased around 2007-2008, installed spring of 2008; a fire alarm went of during the installation of the new switch).

Switches

TJ has primarily been a Cisco school for many years now. The Syslab's main router is a Cisco 4506 with a few SOHO switches for additional machines.

As a backup router, the Syslab has utilized a Cisco 1751 which resides under the floor, a few tiles away from the switch. This 10Mb/s switch was last used when the Cisco 4506 switch was being installed, and a temporary router was needed so all Syslab services weren't offline.

Wiring

The Syslab's wiring was re-done over the summer of 2008 and Cat6 cabling was installed. Prior to this (not sure as to the date) the Syslab was decked out in Cat5e wiring. Both of these installations were done by students.