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Beginner

Router Interface binding

Router 1941 is installed with additional 4 Gig-interfaces card; we have 4 ADSL Router with 4 MB connections. I need to connect all the ADSL connection to the router 4 port and combine them into 16 MB, is there any way to combine 4 Gig interfaces?

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Hall of Fame Expert

Router Interface binding

Hello Mohamed,

all you can do is to use all the 4 DSL lines in parallel but you cannot combine them to make them appear a single link.

You will need 4 default static routes like

ip route 0.0.0.0 0.0.0.0 gi1/0

ip route 0.0.0.0 0.0.0.0 gi1/1

ip route 0.0.0.0 0.0.0.0 gi1/2

ip route 0.0.0.0 0.0.0.0 gi1/3

And you will need appropriate NAT commands to perform NAT of internal source addresses when accessing the internet

ip nat source inside route-map nat-g10 interface gi1/0 overload

ip nat source inside route-map nat-g11 interface gi1/1 overload

ip nat source inside route-map nat-g12 interface gi1/2 overload

ip nat source inside route-map nat-g13 interface gi1/3 overload

where each route-map is like the following:

route-map nat-g10 permit 10

match ip address 10

match interface gi1/0

route-map nat-g11 permit 10

match ip address 10

match interface gi1/1

route-map nat-g12 permit 10

match ip address 10

match interface gi1/2

route-map nat-g13 permit 10

match ip address 10

match interface gi1/3

access-list 10 permit 0.0.0.255

Hope to help

Giuseppe

View solution in original post

4 REPLIES 4
Hall of Fame Expert

Router Interface binding

Hello Mohamed,

all you can do is to use all the 4 DSL lines in parallel but you cannot combine them to make them appear a single link.

You will need 4 default static routes like

ip route 0.0.0.0 0.0.0.0 gi1/0

ip route 0.0.0.0 0.0.0.0 gi1/1

ip route 0.0.0.0 0.0.0.0 gi1/2

ip route 0.0.0.0 0.0.0.0 gi1/3

And you will need appropriate NAT commands to perform NAT of internal source addresses when accessing the internet

ip nat source inside route-map nat-g10 interface gi1/0 overload

ip nat source inside route-map nat-g11 interface gi1/1 overload

ip nat source inside route-map nat-g12 interface gi1/2 overload

ip nat source inside route-map nat-g13 interface gi1/3 overload

where each route-map is like the following:

route-map nat-g10 permit 10

match ip address 10

match interface gi1/0

route-map nat-g11 permit 10

match ip address 10

match interface gi1/1

route-map nat-g12 permit 10

match ip address 10

match interface gi1/2

route-map nat-g13 permit 10

match ip address 10

match interface gi1/3

access-list 10 permit 0.0.0.255

Hope to help

Giuseppe

View solution in original post

Beginner

Router Interface binding

Hi Larosa Giuseppe,

Thanks for the reply,

In this scenario the NAT will be done by the edge ADSL routers, and Is that only the 4 static route will be enough for load sharing or need to be add each interface “IP Load-Sharing Destination-Base” command, any other method to accomplish this task!

Beginner

Router Interface binding

Thanks.

Hall of Fame Expert

Router Interface binding

Hello Mohamed,

I'm sorry I had missed your followup question.

Load sharing is achieved with the 4 static default route no special commands are needed in interface configuration mode.

Hope to help

Giuseppe

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