Internal:Networking

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Exactly what you'd guess.

Network services

  • Network address translation
IP range may be limited, and more secure this way by default
  • DHCP
Automatic connectivity negotiation—makes everyone's life easier
  • Caching nameserver
Resolution for local hostnames, speed
  • Lighttpd, Ruby
Web-based software for conference management
  • MySQL
Databases should be transferred to local server during conference in case of Internet connectivity outage
  • HTTP proxy
Speed++
  • IRC BNC
Keep people connected when they lose their WiFi link


Floor plan

Access point placement

Backbone

  1. Gartenhaus as backbone hub
  2. Roof, connecting the broadnet uplink
  3. In the lobby in front of Grosser Saal
  4. Terassensaal

Those 4 APs will be equipped with high-gain antennas. The first two have to be outdoor antennas. The backbone will be closed to the public (encryption, MAC based access list, ...).

Terassensaal

  1. One AP for the chill out area

Gartenhaus

  1. One AP for the organization committee

Conference building

2 OG (3rd floor)

  1. One AP for the lobby
  2. One AP inside of Grosser Saal, connected to the first one via WDS (AP client mode)

3 OG (4th floor)

  1. One AP for the lobby, connected to the first AP in 2 OG by cable

1 OG (2nd floor)

  1. One AP for the lobby, connected to the first AP in 2 OG by cable
  2. One AP inside of Kleiner Saal, connected to the first one via WDS (AP client mode)

EG (1st floor, ground level)

  1. One AP for the lobby, connected to the first AP in 2 OG by cable
  2. One AP in the corridor, in front of E10, connected to the first AP in 2 OG by cable
  3. One AP in E11, connected to the first AP via WDS (AP client mode)
  4. One AP in E10, connected to the second AP via WDS (AP client mode)
  5. One AP in E12, connected to the second AP via WDS (AP client mode)

=> 16 APs in total

Access Point models

Linksys WAP54G

  • Cheap, only 60 Euro
  • Various modes:
    • Access Point
    • AP client, link an Ethernet to a WLAN
    • Repeater, extending the range of an AP
    • Bridge, two Bridges can connect two Ethernets
  • The different modes are mutually exclusive. A WAP54G can either be used as AP or to connect an Ethernet LAN or to extend the range.
  • SNMP support. Manual does not tell which SNMP version is used.
  • Web based configuration
  • detachable antennas
  • plastics case

Netgear WG302

  • about 200 Euro
  • DHCP server
  • Various modes:
    • Access Point
    • Point-to-point bridge
    • Point-to-multi-point bridging
    • Wireless repeater
    • no AP client mode
  • The manual does not explicitly state this, but it looks like the modes being mutually exclusive, too.
  • SNMP support, syslog support
  • CLI support, config files can be copied from one AP to another.
  • SSH or web based config
  • RADIUS
  • detachable antennas, reverse SMA connector
  • can be powered via 802.3af Power over Ethernet
  • metal case

Summary

11x WG302 for backbone 200€ 2'200€
1x WG302 spare part 200€ 200€
4x 9dBi outdoor antenna, 15m (45ft) cable 150€ 600€
5x WAP54G for AP clients 60€ 300€
1x WAP54G spare part 60€ 60€
Total 3360€

I can help out with approx 10 WRT54GS Accesspoints, which work very stable. -- Joerg.Hoh 30 June 2005 14:10 (UTC)

Switch placement

Gartenhaus

1x 8port in 1st floor Netgear FS108 40€ 40€
1x 16port in the basement Netgear FS116 100€ 100€

Terassensaal

3x 8port in different corners of the room Netgear FS108 40€ 120€

Conference building

3x 8port in each seminar room (1st floor) Netgear FS108 40€ 120€
1x 8port PoE switch in the lobby (1st floor) Netgear FS108P 100€ 100€
2x 8port in different corners of Kleiner Saal (2nd floor) Netgear FS108 40€ 120€
1x 8port in the lobby (2nd floor) Netgear FS108 40€ 40€
1x 16port inside Grosser Saal (3rd floor) Netgear FS116 100€ 100€
3x 8port inside Grosser Saal, different corners (3rd floor) Netgear FS108 40€ 120€
1x 8port PoE switch in the Lobby (3rd floor) Netgear FS108P 100€ 100€
1x 8port in the lobby (4th floor) Netgear FS108 40€ 40€

Spare parts

1x Netgear FS108 40€ 40€
1x Netgear FS108P 100€ 100€
1x Netgear FS116 100€ 100€
Total 1240€

Shopping list

Product Count price/1 total CSV Mindfactory
Netgear FS116 3 100€ 300€ 175,77€ -
Netgear FS108 15 40€ 600€ - 453,60€
Netgear FS108P 3 100€ 300€ - 263,64€
Netgear WG302 12 200€ 2'400€ 2'251,20€ -
9dBi outdoor antenna, 15m (45ft) cable 4 150€ 600€
LinkSys WAP54G 6 60€ 360€ 338,34€ -
Total 4'560€ 2'765,31€ 717,24€

Other computing devices

  • 2 wireless laptops for registration/checkin
German Verein has two apple notebooks -- JV

In need of

  • 1 computer per presentation room
for freematrix radio to broadcast to all who can't attend -- Apple
You'll get one for Großer Saal and one for Kleiner Saal. -- JeLuF 19:20, 13 July 2005 (UTC)

Network map

Click to enlarge

Campus

Wm0.1-page1.png


Conference building

Wm0.1-page2.png

Questions

  • What kind of internet connection do we get?
    • 10 Mb/s bidirectional microwave from Broadnet.
  • Where is the internet connection located in the HdJ?
    • On the roof. We'll have to zap the signal from there to the Gartenhaus NOC, then branch off from there.
      • Is it possible to use a cable (copper/fibre) for this? Even if you have direct sight, you may have problems. Beside the problem, that some people use by accident that connection with their notebooks.
        • The NOC will be in a separate building several yards away, and the antenna a few stories up, so no. As usual with this sort of setup, the wireless link will be isolated, directional, and WPA-encrypted.
  • Do we really want to have a wireless backbone?
    • Yes.
      • I made a really good experience with cable-bound backbones. Yes, it requires time and equipment to setup, but cable doesn't make a problem. No microwave disturbing the frequencies, no shielded windows, no metal. And in every case you'll have enough internal bandwidth.
        • Wired connections are obviously superior in every respect except their need for wires. Were the HdJ already wired for ethernet, things would be very different, but we have to deal with what we have. The setup we have planned is not at all uncommon, and was decided upon after months of careful consideration and discussion.