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Home > Archive > alt.certification.cisco > December 2003 > Setting up home network
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Setting up home network
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| KaBookie 2003-12-12, 2:24 pm |
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I recently bought 2 cisco 2501 routers and a catalyst 1900 switch. I was
wanting to setup a in home network with my broadband connection.
How can i do this when i only have one ethernet port on each router and
2 serial ports on each router?
Thanks in advance
KaBookie
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View this thread: http://www.mcse.ms/message175219.html
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| Use one router's Ethernet port to connect to your broadband router, connect
the two 2501s with a serial cable and connect the other 2501's Ethernet port
to your 1900 switch. Then plug your computers in the 1900 switch. Divide
your LAN (ex. 192.168.1.0 /24) into subnets such as:
192.168.1.0 /20
192.168.1.0 255.255.255.240
192.168.1.16 255.255.255.240
etc.
If your broadband router's LAN IP address is 192.168.1.1 255.255.255.0, then
configure 2501's Ethernet port for 192.168.1.2 255.255.255.240. This way
your broadband router will still think that you have a flat network even
though you subdivided it into 16 subnets.
Enable Proxy ARP on 2501's Ethernet port so that it would respond to ARP
requests addressed to hosts behind it (remember, your broadband router will
have no idea it's talking to a router, so it will be sending ARP requests to
reach the hosts on the LAN). Then configure 2501s serial port for
192.168.1.17 255.255.255.240. Configure the other 2501's serial port for
192.168.1.18 255.255.255.240. Finally, configure the other 2501's Ethernet
port for 192.168.1.33 255.255.255.240. Assign static IPs from subnet
192.168.1.32 255.255.25.240 to your workstations and configure static DNS
servers on your workstations.
Configure a static route in 2501s connected to your broadband router,
pointing to broadband router's LAN IP address. Run a routing protocol
between two 2501s. Depending on the routing protocol you decide to run,
redistribute the static route from the 2501 connected to the broadband
router to the 2501 connected to the 1900 switch.
The alternative would be to connect one 2501 directly to your broadband
modem, but unless you have a static IP address from your provider, you will
have to configure a DHCP client on 2501. Not all feature sets support DHCP
client on 2501. You will have to find out if your IOS feature set supports
it. If it does, you can even redistribute your providers DHCP lease to your
workstations. You will also need to configure an access-list on your 2501 to
serve as a firewall or if you have a feature set with stateful firewall, you
can even do that. This involves a lot more configuration than just having a
2501 connected to a broadband router.
Grey
"KaBookie" <KaBookie.yc9aa@mail.mcse.ms> wrote in message
news:KaBookie.yc9aa@mail.mcse.ms...
>
> I recently bought 2 cisco 2501 routers and a catalyst 1900 switch. I was
> wanting to setup a in home network with my broadband connection.
>
> How can i do this when i only have one ethernet port on each router and
> 2 serial ports on each router?
>
> Thanks in advance
>
>
> KaBookie
> ------------------------------------------------------------------------
> Posted via http://www.mcse.ms
> ------------------------------------------------------------------------
> View this thread: http://www.mcse.ms/message175219.html
>
| |
| Bernie 2003-12-13, 12:24 am |
| On Fri, 12 Dec 2003 13:50:42 -0500, "Grey" <bbb@ccc.com> wrote:
>Use one router's Ethernet port to connect to your broadband router, connect
>the two 2501s with a serial cable and connect the other 2501's Ethernet port
>to your 1900 switch. Then plug your computers in the 1900 switch. Divide
>your LAN (ex. 192.168.1.0 /24) into subnets such as:
>
>192.168.1.0 /20
>192.168.1.0 255.255.255.240
>192.168.1.16 255.255.255.240
>etc.
>
>If your broadband router's LAN IP address is 192.168.1.1 255.255.255.0, then
>configure 2501's Ethernet port for 192.168.1.2 255.255.255.240. This way
>your broadband router will still think that you have a flat network even
>though you subdivided it into 16 subnets.
If you would go to all this trouble to make it look like a flat
network, why not simply plug the Catalyst into the broadband router
and be done with it... It is better to have a flat network than to
try to make a routed network act like a flat network, because at least
you would be using the right tools for the job. No need to proxy ARP.
>Enable Proxy ARP on 2501's Ethernet port so that it would respond to ARP
>requests addressed to hosts behind it (remember, your broadband router will
>have no idea it's talking to a router, so it will be sending ARP requests to
>reach the hosts on the LAN). Then configure 2501s serial port for
>192.168.1.17 255.255.255.240. Configure the other 2501's serial port for
>192.168.1.18 255.255.255.240. Finally, configure the other 2501's Ethernet
>port for 192.168.1.33 255.255.255.240. Assign static IPs from subnet
>192.168.1.32 255.255.25.240 to your workstations and configure static DNS
>servers on your workstations.
>
>Configure a static route in 2501s connected to your broadband router,
>pointing to broadband router's LAN IP address. Run a routing protocol
>between two 2501s. Depending on the routing protocol you decide to run,
>redistribute the static route from the 2501 connected to the broadband
>router to the 2501 connected to the 1900 switch.
>
>The alternative would be to connect one 2501 directly to your broadband
>modem, but unless you have a static IP address from your provider, you will
>have to configure a DHCP client on 2501. Not all feature sets support DHCP
>client on 2501. You will have to find out if your IOS feature set supports
>it. If it does, you can even redistribute your providers DHCP lease to your
>workstations. You will also need to configure an access-list on your 2501 to
>serve as a firewall or if you have a feature set with stateful firewall, you
>can even do that. This involves a lot more configuration than just having a
>2501 connected to a broadband router.
A lot depends on whether he has a broadband router, broadband modem,
or whatever. That determines what would be necessary for him to run
on the other gear. I am also not a big fan of trying to figure out
how many devices can be squeezed in between my PC and my DSL
connection. I have a switch, a Firewall/NAT device, a DSL modem, and
that is it. If I am in my laz-e-boy with my laptop, I have an AP,
switch, firewall/NAT device, DSL modem. The rest of my equipment is
in a lab. Home networks (IMO) should be simple with the rest of the
extra "for-fun" gear behind the production part of your network or
separated entirely.
>Grey
>
>"KaBookie" <KaBookie.yc9aa@mail.mcse.ms> wrote in message
>news:KaBookie.yc9aa@mail.mcse.ms...
>
--Bernie
| |
|
| Bernie,
I think the guy has just bought two 2501 routers and is playing with them.
He probably wants to tap into his broadband connection to be able to route
to the Internet. One thing is to run pings back and forth between two
routers; another thing is when you can actually get on the Internet through
Cisco routers you've just configured yourself. Also, he probably wants to
run different routing protocols between the two routers and play with static
route redistribution. Practicing access-lists are also great when you can
route to and from the Internet. So, I don't think his goal is to use the two
2501 routers for the sole purpose of getting computers on his home network
to connect to the Internet.
The reason he needs to subdivide his flat network into subnets and use Proxy
ARP on the Cisco router connected to the broadband router is because
broadband routers don't understand subnets on their LAN side. On the other
hand, if he wants to connect his Cisco routers to the broadband router, he
needs to have Cisco routers' interfaces in different subnets.
Certainly, if his goal is to browse the Internet he shouldn't use outdated
Cisco routers with one Ethernet interface for this purpose. But I think he
is trying to use them with a different purpose in mind.
Grey
"Bernie" <Bernie@weekend.com> wrote in message
news:ev6ltv8udj5ke6ldvm9ttv2o3
skpk6ccr6@4ax.com...
> On Fri, 12 Dec 2003 13:50:42 -0500, "Grey" <bbb@ccc.com> wrote:
>
connect[color=blue]
port[color=blue]
then[color=blue]
>
> If you would go to all this trouble to make it look like a flat
> network, why not simply plug the Catalyst into the broadband router
> and be done with it... It is better to have a flat network than to
> try to make a routed network act like a flat network, because at least
> you would be using the right tools for the job. No need to proxy ARP.
>
will[color=blue]
to[color=blue]
Ethernet[color=blue]
will[color=blue]
DHCP[color=blue]
supports[color=blue]
your[color=blue]
to[color=blue]
you[color=blue]
a[color=blue]
>
> A lot depends on whether he has a broadband router, broadband modem,
> or whatever. That determines what would be necessary for him to run
> on the other gear. I am also not a big fan of trying to figure out
> how many devices can be squeezed in between my PC and my DSL
> connection. I have a switch, a Firewall/NAT device, a DSL modem, and
> that is it. If I am in my laz-e-boy with my laptop, I have an AP,
> switch, firewall/NAT device, DSL modem. The rest of my equipment is
> in a lab. Home networks (IMO) should be simple with the rest of the
> extra "for-fun" gear behind the production part of your network or
> separated entirely.
>
was[color=blue]
>
>
>
>
> --Bernie
| |
| BoogieMan 2003-12-13, 11:25 am |
| On Sat, 13 Dec 2003 00:45:01 -0500, "Grey" <bbb@ccc.com> wrote:
>Bernie,
>
>I think the guy has just bought two 2501 routers and is playing with them.
>He probably wants to tap into his broadband connection to be able to route
>to the Internet. One thing is to run pings back and forth between two
>routers; another thing is when you can actually get on the Internet through
>Cisco routers you've just configured yourself. Also, he probably wants to
>run different routing protocols between the two routers and play with static
>route redistribution. Practicing access-lists are also great when you can
>route to and from the Internet. So, I don't think his goal is to use the two
>2501 routers for the sole purpose of getting computers on his home network
>to connect to the Internet.
Right. That is why if it were me, I would connect the routers behind
(for lack of better term) or parallel to my access. The routers are
there, you can put a file server on the other end, etc. and use it.
You can also hack the config to bits, rebuild it, play mad scientist
and it doesn't affect your primary internet use.
>The reason he needs to subdivide his flat network into subnets and use Proxy
>ARP on the Cisco router connected to the broadband router is because
>broadband routers don't understand subnets on their LAN side. On the other
>hand, if he wants to connect his Cisco routers to the broadband router, he
>needs to have Cisco routers' interfaces in different subnets.
I understand why, I just had a different perspective on the answer.
And we are also assuming it is a broadband router. It could be a
simple modem in which case he might need PPPoE without all the other
workarounds.
>Certainly, if his goal is to browse the Internet he shouldn't use outdated
>Cisco routers with one Ethernet interface for this purpose. But I think he
>is trying to use them with a different purpose in mind.
I am working on the assumption that at the end of the day it is all of
our goals to browse the Internet without having to take down all the
gear and reconfigure devices on a regular basis. In this case you can
have your cake and eat it too if you set it up the right way.
>Grey
>
>"Bernie" <Bernie@weekend.com> wrote in message
> news:ev6ltv8udj5ke6ldvm9ttv2o3
skpk6ccr6@4ax.com...
>connect
>port
>then
>will
>to
>Ethernet
>will
>DHCP
>supports
>your
>to
>you
>a
>was
>
| |
| Pastor 2003-12-13, 3:25 pm |
| Just happened to read this post and was interested cause seems like you guys
know what you're talking about. I have a 1602 with a 56K 4 wire connection,
also has an ethernet. Then I have two 2501's and one 2524. And last a
Cisco 1924. I ahve DSL coming in to my house. Can I get to the internet
from my PC then thru a Cisco setup and out DSL modem with the equipment I
have? Appreciate any help. Thanks.
"BoogieMan" <nospamplease@nospam.com> wrote in message
news:u3bmtvssqsgflb616fd94st3c
tnbdva9vm@4ax.com...
> On Sat, 13 Dec 2003 00:45:01 -0500, "Grey" <bbb@ccc.com> wrote:
>
them.[color=blue]
route[color=blue]
through[color=blue]
static[color=blue]
two[color=blue]
network[color=blue]
>
> Right. That is why if it were me, I would connect the routers behind
> (for lack of better term) or parallel to my access. The routers are
> there, you can put a file server on the other end, etc. and use it.
> You can also hack the config to bits, rebuild it, play mad scientist
> and it doesn't affect your primary internet use.
>
Proxy[color=blue]
other[color=blue]
he[color=blue]
>
> I understand why, I just had a different perspective on the answer.
> And we are also assuming it is a broadband router. It could be a
> simple modem in which case he might need PPPoE without all the other
> workarounds.
>
outdated[color=blue]
he[color=blue]
>
> I am working on the assumption that at the end of the day it is all of
> our goals to browse the Internet without having to take down all the
> gear and reconfigure devices on a regular basis. In this case you can
> have your cake and eat it too if you set it up the right way.
>
Ethernet[color=blue]
Divide[color=blue]
255.255.255.0,[color=blue]
way[color=blue]
even[color=blue]
ARP[color=blue]
requests[color=blue]
for[color=blue]
DNS[color=blue]
run,[color=blue]
broadband[color=blue]
2501[color=blue]
firewall,[color=blue]
having[color=blue]
and[color=blue]
>
>
>
| |
| Bernie 2003-12-28, 1:24 am |
| On Sat, 13 Dec 2003 09:24:03 -0600, BoogieMan
<nospamplease@nospam.com> wrote:
Strange.... I guess I had an old (and different) profile on my
laptop....
[color=blue]
>On Sat, 13 Dec 2003 00:45:01 -0500, "Grey" <bbb@ccc.com> wrote:
>
>
>Right. That is why if it were me, I would connect the routers behind
>(for lack of better term) or parallel to my access. The routers are
>there, you can put a file server on the other end, etc. and use it.
>You can also hack the config to bits, rebuild it, play mad scientist
>and it doesn't affect your primary internet use.
>
>
>I understand why, I just had a different perspective on the answer.
>And we are also assuming it is a broadband router. It could be a
>simple modem in which case he might need PPPoE without all the other
>workarounds.
>
>
>I am working on the assumption that at the end of the day it is all of
>our goals to browse the Internet without having to take down all the
>gear and reconfigure devices on a regular basis. In this case you can
>have your cake and eat it too if you set it up the right way.
>
--Bernie
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