Embed Size (px)
Citation preview
FSILG Data Networks
Stuart Peloquin, MIT ResNet CoordinatorOliver Thomas, Manager, MIT Help Desk
FSILG House Manager Course, IAP 2006
Wednesday, 18 January 2006
FSILG HM 101, IAP 2006 (othomas, peloquin)
Agenda
• Status update: external connectivity to off-campus houses
• Network design: ways to architect internal networks (general principles, central resources)
• Escalation and contact chain(net contacts, central support, network operations, Verizon)
FSILG HM 101, IAP 2006 (othomas, peloquin)
Key takeaways
• The better your connection to the outside, the more important the quality of your network on the inside becomes
• Understand the difference between a shared and switched network
• Understand the difference between a monolithic and segmented network
• Critically important: current ILG Network Contacts (help make it so!)
FSILG HM 101, IAP 2006 (othomas, peloquin)
External connectivityto off-campus houses
• “External” refers to the fact that connectivity to off-campus ILG’s runs through a third-party service provider, Verizon, and MIT does not control the network end-to-end or at remote end
• MIT invested in a major upgrade of external connectivity (beginning May of 2005)
– Moving from T1 copper lines (1.5 Mbps effective) to dedicated fiber (set at 10 Mbps)
– FTTP more robust than copper
– Bandwidth upgradeable
FSILG HM 101, IAP 2006 (othomas, peloquin)
Connectivity to house:entry equipment
• Verizon network interface
– equipment maintained and branded by Verizon
– should not be touched except by Verizon service techs
• MITnet router
– 48-port Cisco 3000 series router
– What your network plugs into
– Do not power-cycle without permission from MIT Network Operations
• Keep both powered and secured
FSILG HM 101, IAP 2006 (othomas, peloquin)
Network design
Shared (or “hubbed”) network (bad!)
Verizon Network Interface
MITnet Router
MITnet / World
Your hub(s)
FSILG HM 101, IAP 2006 (othomas, peloquin)
Network design
Switched network (good!)
Verizon Network Interface
MITnet Router
MITnet / World
Your switch(es)
FSILG HM 101, IAP 2006 (othomas, peloquin)
Network design
Monolithic versus segmented networks
• New MITnet routers installed in houses have 48 internal ports
• Design choices when connecting your internal networks
• This choice only makes sense for switched networks (highly desirable with new external connectivity)
FSILG HM 101, IAP 2006 (othomas, peloquin)
Network design
Monolithic network
Verizon Network Interface
Your switch(es)
MITnet Router
FSILG HM 101, IAP 2006 (othomas, peloquin)
Network design
Segmented network(better for most houses)
Verizon Network Interface
1st floor switch
MITnet Router
2nd floor switch
Wireless switch
FSILG HM 101, IAP 2006 (othomas, peloquin)
Network design
Segmented network
etc…
Verizon Network Interface
MITnet Router
FSILG HM 101, IAP 2006 (othomas, peloquin)
Escalation and contact chain:who fixes what?
• Problems with the fiber link:
• Problems with the MITnet router:
• Problems with the house network(anything on the house side of the MITnet router):
ResidentsILG NetContacts(ht-ilg-acl)
MIT IS&T:[email protected]
MIT IS&T:Network
Operations
VerizonCommercialData Svcs
ResidentsILG NetContacts(ht-ilg-acl)
MIT IS&T:[email protected]
MIT IS&T:Network
Operations
ResidentsILG NetContacts(ht-ilg-acl)
MIT IS&T:[email protected]
MIT IS&T:Network
Operations
Outside wiring
contractors
FSILG HM 101, IAP 2006 (othomas, peloquin)
Key takeaways
• The better your connection to the outside, the more important the quality of your network on the inside becomes
• Understand the difference between a switched and shared network
• Understand the difference between a monolithic and segmented network
• Critically important: current ILG Network Contacts (help make it so)
FSILG HM 101, IAP 2006 (othomas, peloquin)
Resources and contacts
• [email protected] is primary contact mechanism for ILG Net Contacts
to report problems and request help
• We will provide general internal network design, troubleshooting, and
product advice and can refer to MIT contractors for more extensive
design and implementation work. (Note: if desiring external
connectivity beyond 10 Mbps, this may require upgrade and audit of the
internal network.)
• Central grant funds are available for internal network upgrades. See
http://mit.edu/irdf/
• http://mit.edu/rescomp/ilg/
– New: one-sheets documenting internal networks (one directory per house in“rescomp” locker, editable by currnet ILG Net Contacts)
– Some status and outage information (also mrtg and 3down)
– Useful for IS&T in helping with troubleshooting; useful to new ILG Net Contacts
