network infrastructure n.
Skip this Video
Download Presentation
Network Infrastructure

Loading in 2 Seconds...

play fullscreen
1 / 15

Network Infrastructure - PowerPoint PPT Presentation

  • Uploaded on

Network Infrastructure. IT Supporters Update – 26 June 2007. Contents. Network overview Server connectivity upgrade Wireless network changes Subnet changes DNS and DHCP infrastructure. Network overview. Two separate networks readingConnect (for halls of residence) Campus network

I am the owner, or an agent authorized to act on behalf of the owner, of the copyrighted work described.
Download Presentation

PowerPoint Slideshow about 'Network Infrastructure' - ellis

Download Now An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.

- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -
Presentation Transcript
network infrastructure

Network Infrastructure

IT Supporters Update – 26 June 2007

  • Network overview
  • Server connectivity upgrade
  • Wireless network changes
  • Subnet changes
  • DNS and DHCP infrastructure
network overview
Network overview
  • Two separate networks
    • readingConnect (for halls of residence)
    • Campus network
  • Both networks share common border area
  • Focus on campus network
    • Each building connected at a minimum of 1Gbit/s
    • Except for Bulmershe and halls of residence
      • New router to be installed at Bulmershe to make better use of existing switches and infrastructure
      • Halls of residence too far away for more than 100Mbit/s
network overview1
Network overview
  • Border network forms connection between campus network, readingConnect and JANET
  • Two JANET connections
    • Each 1Gbit/s over long-range fibre
    • Diverse routes
    • Endpoints over 1.5Km apart
  • Fully resilient
  • Traffic split across both links during normal operation
    • Campus traffic one way
    • readingConnect traffic goes the other
network overview2
Network overview
  • 10616 IP addresses in use by 8964 unique hosts
  • 1844 hosts registered but not seen on network since Feb
    • These will be removed at the end of July
    • A list will be distributed to IT Supporters at start of July
  • Monthly stats (2 hour average) show:
    • 92.81Mbit/s peak traffic flow from JANET to campus
    • Average flow of 27.17MBit/s inbound and 15.39MBits/ outbound
    • 95th percentile is 73.02Mbit/s
server connectivity upgrade
Server connectivity upgrade
  • Introduction of 10Gbit Ethernet into the core
  • Two new (large) switches to be installed into ITS machine rooms
    • Each switch will have 10GBit/s to each core router (20Gbit/s)
    • Two switches connected to each other at 20Gbit/s
    • Each switch configured to connect up to 240 ports at 1Gbit/s
    • Switches configured as redundant pair for routing server VLANs
  • Two small switches will provide secondary connections
    • To be used by important systems only (Exchange, etc)
guest wireless network changes
Guest / wireless network changes
  • Deployment of JANET Roaming / Eduroam
    • Web-based redirect no longer permitted to be advertised as eduroam name
    • New wireless network across campus to sit alongside existing service
      • SSID ‘eduroam’
      • Requires 802.1x and WPA / WPA2 encryption
      • Set up and forget – works everywhere that has Eduroam
guest wireless network changes1
Guest / wireless network changes
  • Changes to existing ‘’ service
    • Will move outside firewall
      • But retain protection from Internet hosts
      • Same set of base services as for JANET Roaming
      • Additional resilience through second BlueSocket device
    • Web-based login will accept eduroam / JANET Roaming credentials
    • Proposed service changes Summer 2008:
      • Users will no longer be able to sign on with plain username
        • Must use ‘’ instead
      • Native CIFS access will be turned off – shares still accessible through NetDrive service (WebDAV gateway)
guest wireless network changes2
Guest / wireless network changes
  • New IP address ranges:
    • – for JANET Roaming service
    • – for plug-in and ‘’ service
  • Old address ranges to be removed by September 2007:
    • –
subnet changes
Subnet changes
  • Psychology to complete move to .114 subnet
  • Soil and Plant Science to move to own subnets
  • Systems Engineering to vacate .4 and .56 subnets
  • Student subnets in Careers, Chaplaincy and RUSU to be separated
dns dhcp infrastructure
DNS / DHCP infrastructure
  • Currently two central servers
    • Sun hardware
    • Open source software
    • A bunch of in-house scripts to generate DNS zones
    • More in-house scripts to generate DHCP configuration
    • Painful to manage
    • Relatively slow turn-around for IP address allocation
dns dhcp infrastructure1
DNS / DHCP infrastructure
  • New Infoblox 1550 appliances (HA pair)
    • Take over as master DNS database
    • Replace Sun boxes for DHCP
    • GUI for managing IP address and hostname allocation
    • Should give faster turn-around on IP allocations
    • Possibility of delegation (at least read-only) to IT supporters
  • Expansion of DNS topology
    • Existing Sun boxes become dedicated DNS cache servers
    • Addition of DNS servers into DMZ for best practise
    • Possible additional IT Services managed DNS secondary server at off-site co-location facility