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Two DLS lines + Cisco 3600

Posted on 2003-11-23
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Last Modified: 2010-05-18
I have two dsl connections with a block of 32 static IPs. My boss wants me to combine the two connections using the Cisco router so that I can load balance them. I have two problems.

1. The router only has two (2) ethernet ports and no serial connections. I have no idea how to hook it up to our existing hub (d-link 16 port)
2. I have no idea what command(s) I would use to combine the two interfaces.

At this time I am thinking of somehow using a combination of hubs and a cable/Dsl router (home user type, 4 ports) to achieve this in combination witht the cisco. My basic idea was to;
1. connect both of the dsl lines into the 4 port dsl router, ports 3 and four (it's a linksys)
2. connect the uplink port on the linksys to e0/0 on the cisco
3. connect e0/1 on the cisco to our existing 16 port d-link hub.

If anyone can help me at all it would be greatly appriciated. I have basic knowledge of the Cisco IOS, I am able to configure it for basic operaion using the concsle.
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Question by:alphax43
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lrmoore earned 150 total points
ID: 9808303
If both DSL connections hand off Ethernet, and both LAN interfaces are within the same subnet, you can plug them both into a hub, and one Ethernet port of the router into that same hub. Then simply use two default static routes with same cost:

ip route 0.0.0.0 0.0.0.0 [ip address DSL modem1]
ip route 0.0.0.0 0.0.0.0 [ip address DSL modem2]

The second interface of the router becomes the default gateway for all clients.

Is your router performing NAT, or do you have a firewall or something else doing that?
Else, you can look at something like the Nexland turbo:
http://www.hardware-one.com/reviews.asp?aid=248&page=1
http://www.overclockersclub.com/reviews/nexland.php
or the iSurfJanus
http://www.amplifynet.com/products/janusdx.html
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Author Comment

by:alphax43
ID: 9810561
Just need some clairfication on these commands:

"ip route 0.0.0.0 0.0.0.0 [ip address DSL modem1]
ip route 0.0.0.0 0.0.0.0 [ip address DSL modem2]"

so should it be "ip route {1st ip} {subnet} [(what is this?) DSL (what is this?)"

Thank you again for your help

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Author Comment

by:alphax43
ID: 9810953
ok I think I got it now!

Ok here we go:

My first DSL connection is not static, but doesn't change very oftain (long lease time); the second one is. They are both 3Meg ADSL lines. The scond one has an ip of 67.71.221.160. We have purchased 32 IP addresses. So we own 67.71.221.160 - 67.71.221.192. I am going to set all of my internal clients with static ips. So here is what I think I need to do

step 1: the two lines into my linksys dsl router
step 2: use the uplink port to connect to int e0/0 on the cisco 3600
step 3: set int e0/0 to be 67.71.221.161, and int e0/1 to be 67.71.221.162
step 4: e0/1 on the cisco 3600 connects to the d-link hub
step 5: set static routes on int e0/1 to be the following
  "ip route 67.71.221.160 255.255.255.0 67.71.221.161 1"
  "ip route ?(don't know the ip of the other connection yet) 255.255.255.0 67.71.221.161 1"

Do I need to also set an ip route on int e0/0? and if so would this be correct:
  "ip route 67.71.221.160 255.255.255.0 67.71.221.161 1"
  "ip route ?(unknown) 255.255.255.0 67.71.221.161 1"

And the default gateway for my clients, will it be int e0/1? (67.71.221.162)
and what about DNS for my clients; should I point them to the ISP dns server? (I can find that out)

Thank you again for all your help
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Expert Comment

by:lrmoore
ID: 9854093
Have you made any progress to report?
Do you need more information?

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