lol...Butch beat me to the punch. Marlon stated: >How many ip addys does each customer need in a fully routed >network? gateway, ip and broadcast. I see that as three. Or does >a /30 use up four?
I still don't see how you add what you stated above as three: Network (1) Gateway (2) IP (3) Broadcast (4) Nevertheless, a bridged network requires this many IPs no different than a routed network. The difference is routing requires the use of three additional IPs per segment of your network and not necessarily for each client. Here is a quick cheat sheet on subnets: /32 = one IP /31 = two IP subnet (rarely used) /30 = four IP subnet /29 = eight IP subnet /28 = sixteen IP subnet /27 = thirty-two IP subnet /26 = sixty-four IP subnet /25 = one hundred twenty-eight IP subnet /24 = two hundred fifty-six IP subnet etc, etc... So, for an example if you had a HUB site with four Sectors and each Sector has approx 25-50 clients you could do one of two things. Bridge the entire 100-200 clients into one large broadcast domain by bridging all four Sectors into one dumb switch or you could segment each Sector into its own subnet by routing your network. Certainly the bridging solution is easier to implement, but considering the risk of one client becoming infected and taking down the entire HUB vs. only one sector I would recommend routing. Simply place a five or more port router at the base of the tower and assign a /26 Subnet to each Sector. In doing this you've "burned" only nine more IP addresses routing vs. bridging to serve the same 200+ clients. The bridged design will "burn" three IPs vs. the routed design "burning" twelve, but again considering the benefits of routing over bridging this is a small price to pay. Best, Brad -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Butch Evans Sent: Sunday, December 03, 2006 1:07 PM To: WISPA General List Subject: Re: [WISPA] 900 Mhz Mikrotik SR9 Clients On Sun, 3 Dec 2006, Marlon K. Schafer wrote: The customer will still use 1. >Either way, by bridging each customer only needs one. your customers don't have a gateway? The only difference in routing and bridging as far as this is concerned, is where the gateway IP resides. >The benefits that come with routing to each customer can be made up >for by using a router and/or firewall at each cpe and by blocking >client to client communications. Both this and routing result in >the same thing eh? Customers don't mess with the other customers or >the network. Controlling client to client comms on a single AP will only limit access to other clients of the same AP...It will not prevent customer a on AP1 from communicating with customer a on AP2. -- Butch Evans Network Engineering and Security Consulting 573-276-2879 http://www.butchevans.com/ Mikrotik Certified Consultant (http://www.mikrotik.com/consultants.html) -- WISPA Wireless List: wireless@wispa.org Subscribe/Unsubscribe: http://lists.wispa.org/mailman/listinfo/wireless Archives: http://lists.wispa.org/pipermail/wireless/ -- WISPA Wireless List: wireless@wispa.org Subscribe/Unsubscribe: http://lists.wispa.org/mailman/listinfo/wireless Archives: http://lists.wispa.org/pipermail/wireless/
