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Network confusion

Discussion in 'Networking Issues' started by martin_b, Jul 18, 2007.

  1. martin_b

    martin_b LI Guru Member

    Hello all.

    I have what could very well be a stupid question, but I'm still learning about networking...

    At work I have a ZyXEL ZyWALL 5 as the main router. That router has no WLAN option. Now, I have connected a Linksys WRT54G 2.2 with Thibor 15c firmware to that router via a switch and the Linksys is used as a wireless access point to the network.

    My question is: when computers are connected to the network via WLAN, does the Linksys' limited amount of concurrent connections (2048) become a bottleneck? The ZyXEL has a max concurrent connections of 6000, but will the Linksys act as a bottleneck in this setup, or is it not an issue, since the ZyXEL can handle plenty of connections, and that is the router which is routing the internet connection?

    Hope I have made myself understandable :)
  2. ifican

    ifican Network Guru Member

    Can it become an issue, yes. Depending on how many users you have and what they are doing. Heck a single user running p2p can make that be an issue. However if your users are doing standard web surfing, email etc, it should not be.
  3. martin_b

    martin_b LI Guru Member

    So if I tell the p2p-users to connect via cable to the ZyXEL (which can handle it and doesn't crach), then there should be no problem?
  4. ifican

    ifican Network Guru Member

    Well just because they run p2p doesnt mean it will break depends again on what program and how its setup. I would be more concerned about the fact that p2p is going on at work. The best thing to do is just use it, this way you can get an understanding if its even going to be an issue, if it becomes an issue then you can start moving users around or doing what you need too so you can keep the network stable.
  5. martin_b

    martin_b LI Guru Member

    Believe it or not, but we're actually using BitTorrent as a means of distributing stuff at work, so some of our users kind of have to use it ;)

    Secondly, i was thinking, if i hook up a computer to the WRT54G's ethernet port, will it then function as a switch-only, and "bypass" the built-in router, thus the main router (ZyXEL) will be the bottleneck?
  6. HennieM

    HennieM Network Guru Member

    Martin_b, I assume you connected your WRT to the rest of your network via one of the WRT's LAN ports. If so, then your WRT is running as an AP only, i.e. there's no routing/NAT being done on it (alternatively there's no connection via the WRT on the WAN port of the WRT). Thus, conntrack has no connections to track, and no limit to be reached. It's just a wireless/wired switch.

    BTW, where is the max 2048 connections set? I just changed my WRT54GL to 4095 with state timeout 600 sec, and Thibor 15c firmware accepted that. AFAIK the number of connections is only limited by available RAM. If you need more RAM you can also stop some other services you don't need.
  7. martin_b

    martin_b LI Guru Member

    HennieM: thanks for the explanation. You answered the question I was trying to ask ;) - the WRT is indeed connected to the rest of the network via the LAN port. Cool that it functions as a wireless switch.

    I don't know where the max connections are set. I just read somewhere (possibly in a readme to the Thibor firmware) that the Thibor 15c would set max connections to 2048. How did you manage to alter the connections and state timeout value?
  8. HennieM

    HennieM Network Guru Member

    Connection settings under Administration > Management on 15c.

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