Re: newbie to home network dhcp worries
From: Leythos (void_at_nowhere.lan)
Date: 01/11/05
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Date: Tue, 11 Jan 2005 15:58:39 GMT
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)
- Next message: Shalom B.: "Re: MultiHomed Workstation - Which NIC is being used?"
- Previous message: Dimitris: "Logon takes too long"
- In reply to: Herb Martin: "Re: newbie to home network dhcp worries"
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