Re: newbie to home network dhcp worries

From: Ryan Hanisco (rhanisco_at_flagshipis.com)
Date: 01/11/05 

Date: Tue, 11 Jan 2005 17:33:02 -0600

I'm gonna regret saying anything... but...

Just because it works doesn't make it the best solution. Of course, there
is a point where this becomes moot here too... He'll never care if it
scales, has double NAT issues or would prevent tunneling. 

-- 
Ryan Hanisco
MCSE, MCDBA
Flagship Integration Services
"Leythos" <void@nowhere.lan> wrote in message
news:MPG.1c4dc29237cb1685989e96@news-server.columbus.rr.com...
> In article <#Luo3u#9EHA.4028@TK2MSFTNGP15.phx.gbl>, news@LearnQuick.com
> says...
> > "Leythos" <void@nowhere.lan> wrote in message
> > news:MPG.1c4d863ddd00c40b989e94@news-server.columbus.rr.com...
> > > In article <OrpTCL79EHA.3368@TK2MSFTNGP15.phx.gbl>,
news@LearnQuick.com
> > > says...
> > > > >Actually i have learned
> > > > > alot from this conversation, at the moment i have nat and dhcp
enabled
> > on
> > > > > both and its working, the 3 pc's get different address's depending
> > upon
> > > > > which is booted first from the router.
> > > >
> > > > What is the DHCP on the modem accomplishing?
> > >
> > > The same thing DHCP is suppose to accomplish - providing an IP to the
> > > Linksys Router with the information necessary to reach the ADSL modem
> > > and DNS information.
> >
> > Ok, that is not practical -- if the Linksys router
> > is receiving a dynamic address the Modem will
> > NOT be able to route back to the interior network
> > unless you ALSO run a Dynamic Routing protocol
> > (probably RIP) on both devices.
>
> And this is the entire point of the discussion with YOU - it's already
> working, works fine in most of the home/residential devices, and has
> already been proven to work at least 8 layers deep in our offices.
>
> While it's not the method to use if you want inbound from the net, it
> does allow bidirectional outbound conversations without any problems.
>
> > While this is possible with SOME of these routers
> > (not all), it is unnecessary if you merely give the
> > Linksys a static address, and give the Modem a
> > manual ROUTE.
>
> Leaving everything in Dynamic on the WAN and LAN, it will work with
> Netgear, Linksys, D-Link, and others. It will also work with many
> firewalls, where they get a WAN IP dynamically from the ISP's router and
> then the user has one or more additional Linksys routers setup with a
> DHCP enabled WAN port (on the LAN side of the firewall which is
> servicing DHCP) and then the linksys providing DHCP to it's LAN side to
> workstations or nodes. It's simple, it's a normal use of DHCP, it
> follows the standards for how devices use DHCP, and it's already proven
> to work.
>
> The fact that it's not easy to route inbound unsolicited traffic means
> nothing, that was never a part of this discussion or the OP's question.
>
> The fact that router addresses COULD change does not impact then network
> or the users, at least as long as all the units properly connect via
> DHCP to each other.
>
> Sure, it would be better if the Linksys router was using a fixed WAN
> address on the modems LAN, but as long as the modem knows where the
> Linksys router is (via it's DHCP assignment), it's not going to have any
> trouble routing traffic from the Linksys LAN to the Modem to the
> internet and back (as long as it started on the Linksys LAN).
> >
> > As I have told you all along, the DHCP on the Modem
> > is "ok" but it isn't really helping you.
>
> And no one is disagreeing with you, in fact I have already agreed with
> it and suggested that it would be easier to manage inbound traffic if
> the Linksys was using a fixed IP on the WAN - and that both need to be
> in different subnets (Modem LAN 192.168.1.0/24 and Linksys LAN
> 192.168.2.0/24).
>
> Why don't you try it yourself so that you can see that it works, works
> well, and not just guess that it's not going to work well. Even between
> lease renewals it works fine. I've got this setup running at several
> sororities - PUBLIC IP to ROUTER doing DHCP to (WAN=DHCP) ROUTER
> (LAN=DHCP)doing DHCP to the houses computers. Between the inner and
> outer routers is a server with a fixed IP that monitors the traffic
> outbound and does smtp forwarding for the internal users. None of them
> have a problem.
>
>
> -- 
> -- 
> spamfree999@rrohio.com
> (Remove 999 to reply to me)

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