Re: cable router behind ADSL router

In article <3bdff542-cf2d-4a66-806a-
>, Ric says...
> Hi All,
> This might be a tad OT in two of these groups, but you're all
> knowledgeable people so hope it doesn't irritate anyone too much.
>
> quick sanity check:
>
> I've got a Sky-supplied Netgear D834GT router, and I want to use that
> solely as an ADSL modem, and plug it into my new D-Link DIR-655 draft-
> N gigabit cable router so I get gigabit speeds on wired, and draft-N
> wirelessly.
>
> Being Sky-supplied, the Netgear uses Sky's firmware which lacks the
> native half-bridge support I was planning to use. Being Sky, they
> hide the ADSL username and password, too. I *think* I've found this
> out, so I could flash it back to Netgear's standard firmware which
> offers half-bridging, but if I'm wrong, I'm going to lose my internet
> access for a while, so...
>
> I was originally going to connect a LAN port on the Netgear to the WAN
> port on the D-Link, put the public IP of the Dlink in the Netgear's
> DMZ and use it that way. However, it occurred to me that there might
> be an easier way avoiding potential double-NAT issues.
>
> Can anyone see any flaws in turning off the Netgear wifi, and plugging
> a DLink LAN port (i.e. not using the WAN connection at all on the
> Dlink) into the Netgear LAN port. I then get all clients to connect
> wirelessly at draft-N speeds to the Dlink, and any traffic moving
> around the LAN will presumably be handled by the switch built into the
> Dlink, i.e. at gigabit speeds when cabled. DHCP could come from
> either box, I figure it wouldn't matter. The Netgear would still
> handle firewall duties, and the QoS built into the Dlink would still
> work as it'd be regulating traffic connected directly to it. In
> effect the Dlink would be acting as a wireless switch rather than
> routing, I guess.
>
> Am I missing something that'd stop this working?
>
Just make sure that only one device has DHCP running.


--
Conor

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In message <>, Conor
<> writes
>> Am I missing something that'd stop this working?
>>
>Just make sure that only one device has DHCP running.
Would you even need to do this? If the second router is a cable router
for an Ethernet presented service then I think it may just think the WAN
IP is the one assigned to it from the Sky router's DHCP as the cable
router is highly unlikely to do DHCP pass through. I could be very wrong
here but I've certainly used an old Belkin cable router this way. The
only immediate problem I can think of is if the private IP scope is the
same for both devices, then the NAT/routing tables might get a tad
upset...
>
>

--
Clint Sharp