Networking in the Real World Presentation for CS520 Ed Drouillard, IT Services, University of Windsor January 23, 2004

Networking in the Real World Agenda Design Implementation Usability Management The local network Access to External networks Future plans Q&A

Networking in the Real World Design –IP Network type Class (A, B, C) of IP –Old Style –Revamped as the IP space was being used up too quickly CIDR blocks –New Style – less rigid definitions, less IP space waste –Anticipated size of the network Based on number of client connections Less complications if you have a uniform address space

Networking in the Real World Design –Register the Domain name with a Registrar – Canadian Registration Authoritywww.cira.ca –Listing of companies offering part of the IP space in Canada –E.g. –Structure Star, other topologies Subnet Mask, Umask Subnet/VLAN plan –Segregation, Broadcast storms Server connection

Networking in the Real World Design –Ethernet versus ATM Ethernet –Frames (packets) –Ubiquitous –Less complicated –Corporate networks –Variable traffic more likely, but priorities can now be specified ATM (Asynchronous Transfer Mode) –53 byte Cells –More costly –Circuits need to be preplanned and setup between devices –WAN utilization –Mixed network, voice, Videoconferencing env. –Good when bandwidth needs to be guaranteed (QOS)

Networking in the Real World Design –Bandwidth considerations Performance requirements Ethernet: 10MbE, FE, GbE, 10GbE ATM:OC3, OC12, OC48, OC192 (155Mb, 622Mb, 2.4Gbps, 10Gbps) –Application for Autonomous System Number (ASN) ( UoW = 11700) Needed when you have more than 1 network provider (rfc1930) –multi-homed –a 16 bit integer and hence limited to ASNs

Networking in the Real World Implementation –ISP – Internet service provider –PoP – Point of Presence –Equipment Vendor Selection Cisco, Nortel, Extreme, Cabletron, … –Routers, Core and Edge switches –Cable infrastructure Fiber types –Multi-mode, Single-mode Copper –Category 5, 5E, 6, 7, … Racks, Patch panels, BIX connectors –Staffing

Networking in the Real World Usability –Network address assignment IP addressing allocation –Static versus DHCP –Security Management –Control Load balancers Firewalls Packet Shapers Virus checkers SPAM filters –Monitoring Tools –MRTG, What’s UP, … –Troubleshooting Sniffer

Networking in the Real World The local network –FE to almost every desktop system using copper From network closets in each building –GbE connected to all major campus buildings –Fiber connects buildings from UCC –GbE connected servers in ITS The DMZ –Firewall layer Load balancers and firewalls External DNS

Networking in the Real World

Access to External networks –WEDnet – Windsor and Essex County public institutions School boards, Hospitals, College, University ATM based Buying club uses the City of Windsor’s networking infrastructure –Providers connected Telus – Internet Hydro One – Internet CA*net – connected to ONET, via AT&T –Soon to be replaced with CA*net connected through ORION

Networking in the Real World Future plans –Wireless implementation b, g (Shared 11Mbps & 54Mbps) – More VoIP – GbE to selected desktops – Will Require rewiring the campus! – 10GbE – IPv6 Q&A

Networking in the Real World