Adding a wireless router to an existing network with Cisco router

I have a Linksys WRT54G router that I plan to add to an existing network
which is using a Cable Modem, Cisco router and a hub. It is a Novell
network if that matters.

I've learned that to incorporate the wireless router into the network, I
need to disable the DHCP on the Linksys router. Fine...that's easy
enough.

I've also learned that I need to change the LAN IP address of the
Linksys router to correspond with the Cisco router's IP address.

When I look at Network Connections on one of the connected PC's it shows
the IP Address to be 10.10.10.10 and the subnet mask to be 255.255.255.0

I'm accustomed to seeing IP address look like 192.168.0.101 or something
like that so I'm not sure what to make of the 10.10.10.10 address.

Am I on the right track here? If that is a valid IP address, then the
next step is to enter that address into the LAN IP of the Linksys, use a
straight through ethernet cable from an available port on the Cisco
router to the Uplink port on the Linksys and all should then work?

Comments?

Thanks,

Michael

--

> disable the DHCP on the Linksys router.

> I've also learned that I need to change the LAN IP address of the
> Linksys router to correspond with the Cisco router's IP address.

When configuring a router as an access point the LAN IP of the router
need not be in any predetermined range. It may be anything.

> I'm accustomed to seeing IP address look like 192.168.0.101 or
> something like that so I'm not sure what to make of the 10.10.10.10
> address.

It's a private range, just like 192.168/16.

> use a straight through ethernet cable from an available port on the
> Cisco router to the Uplink port on the Linksys and all should then
> work?

If the port on the Cisco is a switch/LAN port.

You've confused me a bit. Are you saying that it doesn't matter what I
enter as the LAN IP address of the Linksys router?

And then your comment about the port on the Cisco must be a switch/LAN
port ... isn't that what all ports are on the back of a router? And if
there is a hub, couldn't I just as well plug into the hub instead of
directly into the Cisco router?

Michael

In article <442dd000$0$74023$(E-Mail Removed) ews.net>,
Dom <(E-Mail Removed)> wrote:

> > disable the DHCP on the Linksys router.
>
> > I've also learned that I need to change the LAN IP address of the
> > Linksys router to correspond with the Cisco router's IP address.
>
> When configuring a router as an access point the LAN IP of the router
> need not be in any predetermined range. It may be anything.
>
> > I'm accustomed to seeing IP address look like 192.168.0.101 or
> > something like that so I'm not sure what to make of the 10.10.10.10
> > address.
>
> It's a private range, just like 192.168/16.
>
> > use a straight through ethernet cable from an available port on the
> > Cisco router to the Uplink port on the Linksys and all should then
> > work?
>
> If the port on the Cisco is a switch/LAN port.

--

> Are you saying that it doesn't matter what I enter as the LAN IP
> address of the Linksys router?

Yes. If you are not routing it doesn't matter.

> the port on the Cisco must be a switch/LAN port ... isn't that what
> all ports are on the back of a router?

The Cisco is not unlike any other router in that one interface will
likely be used for the WAN and another for the LAN.

> And if there is a hub, couldn't I just as well plug into the hub
> instead of directly into the Cisco router?

Yes.

Michael Erb <(E-Mail Removed)> hath wroth:

>You've confused me a bit. Are you saying that it doesn't matter what I
>enter as the LAN IP address of the Linksys router?

Sorta. An access point works on the MAC layer (ISO layer 2). It
doesn't know anything about IP addresses and such. However, you need
an IP address for the Linksys in order to configure it. Select any IP
address that is in the same Class C IP block as the Cisco.
10.10.10.xxx or whatever. Make sure the IP isn't already used and
that it's not in the DHCP range of your existing Cisco.

If you don't want users on the Cisco to "see" the Linksys, you can
literally use any RFC-1918 non-routeable IP address. However, you'll
need to manually set the IP address of your managment workstation to
be able to access the Linksys.

--
Jeff Liebermann (E-Mail Removed)
150 Felker St #D http://www.LearnByDestroying.com
Santa Cruz CA 95060 http://802.11junk.com
Skype: JeffLiebermann AE6KS 831-336-2558

"Michael Erb" <(E-Mail Removed)> wrote in message
news:nospam-(E-Mail Removed)...
>I have a Linksys WRT54G router that I plan to add to an existing network
> which is using a Cable Modem, Cisco router and a hub. It is a Novell
> network if that matters.
>
> I've learned that to incorporate the wireless router into the network, I
> need to disable the DHCP on the Linksys router. Fine...that's easy
> enough.
>
Ok

> I've also learned that I need to change the LAN IP address of the
> Linksys router to correspond with the Cisco router's IP address.

It should be a static IP on the Cisco any IP that's not issued by the DHCP
server on the Cisco.

On Linksys router it should be the following:

1) DHCP disabled on the Linksys.
2) Configure the Linksys to not obtain an IP from the Cisco, like the router
was being a router and it was connected to the modem it would get an DHCP IP
from the ISP. You don't want that mode of the router. You want to give or
configure the Linksys for the IP(s) its to use.
A) IP = a static IP on the Cisco a static IP on the Cisco is any IP
that's not in the range of the DHCP server on the Cisco.
As an example taking the Linksys router that was being used as a
router with its DHCP enabled and it's connected to the modem.
DHCP IP(s) start at 192.168.1.100 to the DHCP issue count. If the count is
10, the last DHCP IP that can be issued is 192.168.1.110. Any IP
after that is a static IP that's not issued by the DHCP server.
B) Subnet Mask is 255.255.255.0 or whatever the Subnet Mask is on the
Cisco.
C) Gateway IP will be the device IP of the Cisco or whatever that IP
that is used to access the Admin screen of the Cisco
through a browser.

>
> When I look at Network Connections on one of the connected PC's it shows
> the IP Address to be 10.10.10.10 and the subnet mask to be 255.255.255.0

It should be getting an IP from the DHCP server on the Cisco, as the Cisco
is the gateway device.
>
> I'm accustomed to seeing IP address look like 192.168.0.101 or something
> like that so I'm not sure what to make of the 10.10.10.10 address.

If set correctly, then you're not going to see any IP that you would see if
the Linksys router was connected to the modem and acting as the gateway with
it's DHCP enabled. It's going to be an IP from the Cisco just like other
machines connected to the Cisco are using its IP(s).
>
> Am I on the right track here? If that is a valid IP address, then the
> next step is to enter that address into the LAN IP of the Linksys, use a
> straight through ethernet cable from an available port on the Cisco
> router to the Uplink port on the Linksys and all should then work?
>
> Comments?
>

You should be using a LAN port on the Cisco and plug the Linksys into it.

You should also remember that the Cisco may have a 10 user license or
something like that possibly, meaning that only 10 IP(s) can be used by
users connected to the router including that Linksys using an IP and any
machines connected to the Linksys getting an IP from the Cisco. The license
will not allow you to use the 11th IP, as an example.

Duane

That's LAN port to LAN port on both the Cisco and the Linksys.

Duane

Well, sometimes things are so easy it's scary.

So after about a week of worrying about this installation, I proceeded.

First I hooked up a laptop directly to the Linksys so that I could access
the WebAdmin panel and turn off DHCP. I also changed the SSID to a more
appropriate name. I didn't change the default LAN IP address at all.Then I
disconnected the laptop and hooked up the Linksys WRT54G to an open LAN port
on the Hub and was immediately able to gain access to the Internet. So
that's all good.

However, I can't seem to access the Linksys WebAdmin from a networked
computer. If I enter 10.10.10.1, I get the Cicsco router, but if I enter
192.168.1.1 (which is the Router IP of the Linksys) nothing happens.

I'm sure this is a simple thing, but not for me unfortunately. What
configuration do I need to change to enable access to the Linksys?

Also, if someone is accessing the Internet wirelessly via the Linksys (the
entire reason we installed it in the first place) we want to ensure that
they cannot access our local network in any way whatsoever. Nor do we want
our ethernet network to show up in their "View Network Connections". Is
there some way to set the Linksys up to disallow any other local network
connectivity other than allowing Internet access?

Michael
"Dom" <(E-Mail Removed)> wrote in message
news:442ddb6c$0$15990$(E-Mail Removed) reenews.net...
>> Are you saying that it doesn't matter what I enter as the LAN IP address
>> of the Linksys router?
>
> Yes. If you are not routing it doesn't matter.
>
>> the port on the Cisco must be a switch/LAN port ... isn't that what
>> all ports are on the back of a router?
>
> The Cisco is not unlike any other router in that one interface will
> likely be used for the WAN and another for the LAN.
>
>> And if there is a hub, couldn't I just as well plug into the hub instead
>> of directly into the Cisco router?
>
> Yes.

[POSTED TO alt.internet.wireless - REPLY ON USENET PLEASE]

In <vGuYf.15740$(E-Mail Removed)> on Tue, 04 Apr 2006 13:39:39
GMT, "cnymike" <(E-Mail Removed)> wrote:

>Also, if someone is accessing the Internet wirelessly via the Linksys (the
>entire reason we installed it in the first place) we want to ensure that
>they cannot access our local network in any way whatsoever. Nor do we want
>our ethernet network to show up in their "View Network Connections". Is
>there some way to set the Linksys up to disallow any other local network
>connectivity other than allowing Internet access?

I don't know about your Linksys, but some wireless routers can be configured
to allow wireless clients access to the Internet (WAN) but not access to the
wired LAN. One such is the Hawking HWR54G Rev M (in Advanced Settings
I think).

--
Best regards, SEE THE FAQ FOR ALT.INTERNET.WIRELESS AT
John Navas <http://en.wikibooks.org/wiki/FAQ_for_alt.internet.wireless>

>
> Also, if someone is accessing the Internet wirelessly via the Linksys (the
> entire reason we installed it in the first place) we want to ensure that
> they cannot access our local network in any way whatsoever. Nor do we want
> our ethernet network to show up in their "View Network Connections". Is
> there some way to set the Linksys up to disallow any other local network
> connectivity other than allowing Internet access?
>
It's called network segmentation. The Cisco router is the gateway router
and the Linksys is set back to router mode (hold down the Reset button for
30 seconds on the Linksys to set it back to its factory defaults, which is
default of being a router and plug Linksys WAN port to Cisco Uplink
ort -- (I think as I have never done it). The Cisco is the gateway for the
Linksys, but each will be on their on segments. The Cisco on 10.10.10 and
Linksys on 192.168.1 and each serving their own DHCP IP(s) to their machines
connected to them and machines on either segment will not see nor can they
access each other. I think a machine connected to their respective router
will be able to access the router's Admin setup via a browser giving the
Device IP of the router.

You may want to call Cisco if you have a current support agreement and ask
them for help on what to do and be done with it.

Duane