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From: Mike Easter on 22 Jul 2010 16:27 John Navas wrote: > Mike Easter >> Could you please elaborate on this line? >> >> May need to use crossover type cable. >> >> ... referring to the ethernet cable to a LAN port on the router/accesspoint. >> >> Or, if there is something in the wiki about that crossover business, >> start me in the right direction. That is, I know what a crossover cable >> is; I just don't know how this maybe, maybe not, works in this application. > > There is usually no need for a crossover cable -- most ports these days > are self-configuring -- so try it first, just get a cheap crossover > cable if the port won't enable otherwise. > Thanks. Let me carry that logic one step further. If the typical router is so smart about sensing what kind of ethernet (crossover vs normal) is connected to it and 'switch'/reverse itself accordingly, does that mean that the typical modern router - functioning as a router - could be connected to a computer on its LAN by a /crossover/ cable instead of a normal cable and the router/switch would be able to figure that out and adjust accordingly? Or am I misunderstanding something about how one might use (either) a cable or a crossover cable in the example of the LAN port of a router functioning as an accesspoint? -- Mike Easter
From: John Navas on 22 Jul 2010 17:51 On Thu, 22 Jul 2010 13:27:30 -0700, in <8arntkF4vgU1(a)mid.individual.net>, Mike Easter <MikeE(a)ster.invalid> wrote: >John Navas wrote: >> There is usually no need for a crossover cable -- most ports these days >> are self-configuring -- so try it first, just get a cheap crossover >> cable if the port won't enable otherwise. >Let me carry that logic one step further. > >If the typical router is so smart about sensing what kind of ethernet >(crossover vs normal) is connected to it and 'switch'/reverse itself >accordingly, It's usually in the port chip. >does that mean that the typical modern router - functioning >as a router - could be connected to a computer on its LAN by a >/crossover/ cable instead of a normal cable and the router/switch would >be able to figure that out and adjust accordingly? It will probably work, depending on the hardware at both ends. -- John FAQ for Wireless Internet: <http://wireless.navas.us> FAQ for Wi-Fi: <http://wireless.navas.us/wiki/Wi-Fi> Wi-Fi How To: <http://wireless.navas.us/wiki/Wi-Fi_HowTo> Fixes to Wi-Fi Problems: <http://wireless.navas.us/wiki/Wi-Fi_Fixes>
From: Jeff Liebermann on 23 Jul 2010 00:34
On Thu, 22 Jul 2010 11:44:22 -0700, Mike Easter <MikeE(a)ster.invalid> wrote: >Jeff Liebermann wrote: > >> Any of the wireless routers listed can be used as an access point: >> <http://wireless.navas.us/wiki/Wi-Fi_How_To#Use_a_wireless_router_as_a_wireless_access_point> > >Could you please elaborate on this line? I'm not into complex and elaborate. Mind if I simplify on this line? >May need to use crossover type cable. > >... referring to the ethernet cable to a LAN port on the router/accesspoint. Yep. When you connect a switch or hub to another switch or hub, you run a chance that the wiring ends up with the tx (transmit) talking to the tx and the rx (receive) talking to the rx. That won't work. With 10baseT, tx goes to rx on both pairs of wires. To make this happen, you can use a crossover cable: <http://en.wikipedia.org/wiki/Ethernet_crossover_cable> a crossover adapter, or you might be lucky and own a switch or router that has "autopolarity" switching on the ethernet ports. Some routers and switches also have a switch labeled MDI/MDX which switched one port to crossover. Lots of ways to make it happen. However, you do it, look at the lights on the front of the router or switch. If you plug in both ends of a cable, the corresponding lights on both sides MUST light up. >Or, if there is something in the wiki about that crossover business, >start me in the right direction. That is, I know what a crossover cable >is; I just don't know how this maybe, maybe not, works in this application. Switches and hub ethernet ports, are wired to talk directly to the ethernet port on a LAN card as found in a typical PC or laptop. They're not really made to talk to each other, as I mentioned above. A crossover cable allows them to talk to each other. -- Jeff Liebermann jeffl(a)cruzio.com 150 Felker St #D http://www.LearnByDestroying.com Santa Cruz CA 95060 http://802.11junk.com Skype: JeffLiebermann AE6KS 831-336-2558 |