multi isp with css11500 series

[mingchieh]

Hello!!

I want to sell a css11501 content switch to my customer , my

customer only need to connect to internet via multiisp adsl line

I want to config css11501 to have Nat to internet and use multiisp load sharing

can css11501 do it ?

[Gilles Dufour]

A simple router would be a better solution.

Cisco routers can loadshare accross multiple isp with no problem and perform nat.

Gilles.

[mingchieh]

Thank you very much about your answer

but I have some question

I think that I use a 2600 or 3600 router to do nat without Bgp

this is my config

Int fa0/1

ip address isp1 addesss

ip nat outside

load-sharing per packet (or per destination)

int fa0/2

ip address isp2 address

ip nat outside

load-sharing per packet (or per destination)

int fa0/3

ip address (ny LAN Gateway)

ip nat inside

Is it correct ??

How to key the ip route command ??

I mean should I use the floatiog route ??

Do you have a EXample ?

also

Would you help me to find this document ??

"Enabling Enterprise Redundancy to Multiple ISP with the

Cisco Content Services Switch (CSS 11000) Multihoming Function" by Robert

Barton, an SE at the Cisco Vancouver, Canada, office.

[Gilles Dufour]

the router will do loadbalancing as long as it has more than 1 route for each a destination.

So, you could just have 2 default static routes.

like :

ip route 0.0.0.0 0.0.0.0 isp1

ip route 0.0.0.0 0.0.0.0 isp2

Also, to use the load share command, you need to enable CEF.

Gilles.

[mingchieh]

Hello!!

I found a protocol

GLBP - Gateway Load Balancing Protocol

IF I CONFIG A CISCO 3660 OR 3700 ROUTER

Can I config two wan interfaces to do GLBP on the same router ??

[Gilles Dufour]

First, why do you want to make things complicated ?

When you design a network, try to find the easiest solution.

You will reduce the risk of software bugs and it will be easier to troubleshoot.

Then, GLBP is some sort of HSRP protocol.

Which means you need 2 routers per site.

GLBP primary function is to achieve redundancy.

If you have only 1 router, it is useless for you.

For your information, here is the description of the protocol :

http://www.cisco.com/en/US/products/sw/iosswrel/ps1839/products_feature_guide09186a00801541c8.html#1027173

Then, the solution with the 2 static routes is what most people use all around the world. It's easy to setup and it works.

The only problem is that you control only the outgoing traffic.

You have no control on the incoming traffic.

If you want to have some control on the incoming traffic, you will need to setup BGP. But then it can go from easy to very tricky to setup.

I would strongly suggest you go first with the 2 static routes, and if in the future you want to tune a little bit the traffic load, you can look for other solutions.

Regards,

Gilles.

[mingchieh]

Thanks a lot

I am sorry that my english not very good

your answer makes me more understand on router Nat and load-sharing

Regards