Network Troubleshooting Flowchart

Revision as of 11:38, 17 December 2009 by Nathan Burt (talk | contribs)

mark as stub?

Currently, this is scratch space for work materials needed to develop flowchart specific to Midd College environment.  Please do not put sensitive information here - as this is publicly available.



Midd-specific IP info:

169 - a computer that is connected to a locally-working Ethernet, has no access to the campus DHCP server.
192 or 10 are private network addresses. These would either be original default settings that a system came with, or (more likely) the result of a computer getting configuration information from a DHCP server other than the proper Middlebury College server. This could either be settings retained from a home network, or a machine could be a victim of a rogue DHCP server—a personal computer improperly configured to act as a DHCP server.
To find the address of a rogue DHCP server on a Windows computer open a command window and type ipconfig /all. Under the stuff it lists for Ethernet adapter, note the DHCP Server IP address. Ping that address. Then type arp –a; among the Internet Address and Physical Address pairs listed you will see the physical address corresponding to the DHCP server’s IP address. Put it in the ticket and assign to the Voter gang.
172 Network Ranges
Range VLAN Description
140.233.18x.xxx Midd_Secure Secured Wireless. Should have access to all domain resources.
172.17.xxx.xxx Registration Unregistered Computer, wired connection
172.18.xxx.xxx Quarantine Quarantined due to Infection or Ill Behavior , wired connection.
172.19.xxx.xxx Penalty Box Infected or not updated computer, wired connection
172.20.xxx.xxx Midd_Unplugged Unsecured Wireless. Internet access only.
Off Campus Student Housing
Courtesy of Peter Lubans, here is the list of off-campus houses that are being used for student housing :
The housing code is the SSID of the wireless network within each house, and for the hubs that are working, the WEP password is available by request.
Off-Campus Locations  -- need to update!!!
Location Housing Code Room Numbers
1229 South St Ext SSE 001, 201, 202, 203, 204, 205
242 College Street CL2 201, 202, 203
131 Franklin Street F13 101, 102, 201
77 Main St, Apt 1 M77 101, 102
77 Main St, Apt. 2 M77 201-1, 201-2
82 Weybridge, Apt 1 WY1 101, 102
82 Weybridge, Apt 2 WY2 201-1, 201-2, 202
82 Weybridge, Apt 3 WY3 301, 302
594 Weybridge WY5 001, 002, 003
100 South Main SM0
102 South Main SM2
Campus Wired Ethernet Subnet List 140.233.x.x